E STAMP CORP
S-1/A, 1999-10-07
BUSINESS SERVICES, NEC
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<PAGE>


  As filed with the Securities and Exchange Commission on October 7, 1999
                                                      Registration No. 333-85359
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549
                               ----------------

                              AMENDMENT NO. 5
                                       TO
                                    FORM S-1
                             REGISTRATION STATEMENT
                                     Under
                           The Securities Act of 1933
                               ----------------
                              E-STAMP CORPORATION
             (Exact name of Registrant as specified in its charter)
                               ----------------
<TABLE>
<S>               <C>                           <C>
    Delaware                  5961                       76-0518568
(State or other   (Primary Standard Industrial        (I.R.S. Employer
jurisdiction of    Classification Code Number)     Identification Number)
incorporation or
 organization)
</TABLE>

                          2855 Campus Drive, Suite 100
                          San Mateo, California 94403
                                 (650) 554-8454
  (Address, including zip code, and telephone number, including area code, of
                   Registrant's principal executive offices)
                               ----------------
                                ROBERT H. EWALD
                     President and Chief Executive Officer
                          2855 Campus Drive, Suite 100
                          San Mateo, California 94403
                                 (650) 554-8454
 (Name, address, including zip code, and telephone number, including area code,
                             of agent for service)
                               ----------------
                                   Copies to:
<TABLE>
<S>                               <C>
         DAVID J. SEGRE                        MICHAEL J. HALLORAN
      MICHELLE L. WHIPKEY                        JAMES P. CLOUGH
       MARK D. BEARIAULT                        PATRICK J. DEVINE
Wilson Sonsini Goodrich & Rosati                 JAMES J. MASETTI
    Professional Corporation              Pillsbury Madison & Sutro LLP
       650 Page Mill Road                      2550 Hanover Street
  Palo Alto, California 94304              Palo Alto, California 94304
         (650) 493-9300                           (650) 233-4500
</TABLE>

                               ----------------

   Approximate date of commencement of proposed sale to the public: As soon as
practicable after the effective date of this Registration Statement.

   If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [_]

   If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [_]

   If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]

   If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]

   If delivery of the prospectus is expected to be made pursuant to Rule 434,
check the following box. [_]

                               ----------------

   The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant
shall file a further amendment which specifically states that this Registration
Statement shall hereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to such Section 8(a),
may determine.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+We will amend and complete the information in this prospectus. Although we    +
+are permitted by US federal securities laws to offer these securities using   +
+this prospectus, we may not sell them or accept your offer to buy them until  +
+the documentation filed with the Securities and Exchange Commission relating  +
+to these securities has been declared effective by the Securities and         +
+Exchange Commission. This prospectus is not an offer to sell these securities +
+or our solicitation of your offer to buy these securities in any jurisdiction +
+where that would not be permitted or legal.                                   +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

                  SUBJECT TO COMPLETION--October 7, 1999

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
Prospectus

      , 1999

                               [LOGO OF E-STAMP]

                        6,500,000 Shares of Common Stock

- --------------------------------------------------------------------------------
  The Company:

  . We provide an Internet postage service that enables users to purchase,
    download and print postage directly from their personal computers.

  . E-Stamp Corporation 2855 Campus Drive, Suite 100 San Mateo, California
    94403(650) 554-8454

  Symbol & Market:

  . ESTM/Nasdaq National Market

  The Offering:

  . We are offering 6,500,000 shares of our common stock.

  . The underwriters have an option to purchase an additional 975,000 shares
    from the Company to cover over-allotments.

  . This is our initial public offering. We anticipate that the initial public
    offering price will be between $14.00 and $16.00 per share.

  . We plan to use the proceeds from this offering for sales and marketing
    expenses and general corporate purposes.

  . Closing:        , 1999.
<TABLE>
  -------------------------------------------------
   <S>                      <C>           <C>
                              Per Share       Total
  -------------------------------------------------
   Public offering price:      $             $
   Underwriting fees:
   Proceeds to Company:
  -------------------------------------------------
</TABLE>

     This investment involves risk. See "Risk Factors" beginning on Page 6.

- --------------------------------------------------------------------------------
Neither the Securities and Exchange Commission nor any state securities
commission has determined whether this prospectus is truthful or complete. Nor
have they made, nor will they make, any determination as to whether anyone
should buy these securities. Any representation to the contrary is a criminal
offense.
- --------------------------------------------------------------------------------

Donaldson, Lufkin & Jenrette

          Banc of America Securities LLC

                          Deutsche Banc Alex. Brown

                                                                  DLJdirect Inc.
<PAGE>

   You should rely only on the information contained in this document. We have
not authorized anyone to provide you with information that is different. This
document may only be used where it is legal to sell these securities. The
information in this document may only be accurate as of the date of this
document.

   "E-Stamp" is a registered trademark, and "E-Stamp.com," "The Internet
Postage Company," and the E-Stamp logo are trademarks of E-Stamp. All other
trademarks or service marks appearing in this prospectus are trademarks or
service marks of others.

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                          Page
<S>                                                                       <C>
Prospectus Summary.......................................................   1
Risk Factors.............................................................   6
Use of Proceeds..........................................................  17
Dividend Policy..........................................................  17
Corporate Information....................................................  17
Forward-Looking Statements...............................................  17
Capitalization...........................................................  18
Dilution.................................................................  19
Selected Financial Data..................................................  20
Management's Discussion and Analysis of Financial Condition and Results
 of Operations...........................................................  21
</TABLE>

<TABLE>
<CAPTION>
                                                                            Page
<S>                                                                         <C>
Business...................................................................  28
Management.................................................................  44
Related Party Transactions.................................................  54
Principal Stockholders.....................................................  57
Description of Capital Stock...............................................  60
Rescission Offer...........................................................  63
Shares Eligible for Future Sale............................................  64
Underwriting...............................................................  66
Legal Matters..............................................................  69
Experts....................................................................  69
Additional Information.....................................................  70
Index to Financial Statements.............................................. F-1
</TABLE>
<PAGE>

                               PROSPECTUS SUMMARY

   This summary highlights information contained elsewhere in this prospectus.
This summary is not complete and does not contain all the information you
should consider before buying shares in the offering. You should read the
entire prospectus carefully.

                              E-Stamp Corporation

Our Business

   We provide an Internet postage service that enables users to purchase,
download and print postage directly from their personal computers. The postage
can be printed directly onto envelopes, labels or documents using standard
laser or inkjet printers, 24 hours a day, seven days a week, without the need
to remain connected to the Internet. Customers can buy the software and
hardware components needed to use our Internet postage service through our
online store at www.e-stamp.com, over the telephone or at office supply stores.
We also plan to sell our services through computer superstores and catalogs.
Our Internet postage service is based upon our E-Stamp software, our secure
postage hardware device that enables the storage on the user's desktop of up to
a maximum of $500 of postage as currently allowed under U.S. Postal Service
regulations, and a U.S. Postal Service address verification CD-ROM. Our
Internet postage software and hardware currently sells for a suggested retail
price of $49.99. As part of our marketing strategy, we have previously, and may
from time to time, offer our software and hardware free of charge through
promotional arrangements with third parties. We charge a 10% convenience fee
when Internet postage is purchased, with a minimum fee of $4.99 and a maximum
fee of $24.99 per purchase. We also plan to offer for sale later this year
postage related consumables and peripherals including an Internet postage
scale, labels, window envelopes and a label printer manufactured by third
parties with whom we have established relationships.

   We received approval from the U.S. Postal Service on August 9, 1999 for our
Internet postage service, and since that date have been providing our service
nationally. Our commercial roll-out is currently limited to 100,000 customers.
The U.S. Postal Service will evaluate our service when we obtain approximately
100,000 customers. Although the U.S. Postal Service has not informed us whether
it will continue to impose limitations on the number of our customers following
this evaluation, we will continue to be subject to U.S. Postal Service
regulations. As a result, the U.S. Postal Service could continue to require
periodic reviews before authorizing greater numbers of customers. Our Internet
postage service is targeted at small business, small office and home office
users, most of whom usually connect to the Internet on modems at speeds of 28.8
or 33.6 kilobytes per second and share lines with telephones or fax machines.
Our Internet postage software is tightly integrated with popular business
computer programs including Microsoft Word and Outlook. This integration allows
users to print our Internet postage without leaving Microsoft Word and to
access addresses in Outlook without leaving the E-Stamp application. We believe
our Internet postage service will enhance customer satisfaction during the mail
and postage process by improving overall access, convenience and flexibility
for small business, small office and home office users, and will increase
operating efficiencies and decrease postal fraud for the U.S. Postal Service by
including a unique digital signature on each digital stamp.

   We have focused on forming marketing and distribution relationships with
industry leaders in order to quickly build our brand awareness with small
business, small office and home office users and to accelerate the adoption of
our Internet postage service. Our marketing and distribution relationships
include the following:

  . Microsoft, which is also one of our equity investors, has selected us as
    a nonexclusive online postage provider for its Microsoft Office Update
    Web site;

  . Yahoo! has chosen us to be its exclusive Internet postage merchant within
    the Yahoo! Postal Center;

                                       1
<PAGE>


  . Excite@Home, which is also one of our equity investors, has entered into
    a binding letter of intent to establish us as a nonexclusive Internet
    postage provider on its @Work Web site; and

  . America Online has agreed to include us as a nonexclusive tenant in its
    new Postage Services Center.

   In addition, we have developed marketing or distribution relationships with
Compaq, Francotyp Postalia, Avery Dennison, Sunbeam Corp.'s Pelouze Scale Co.
division, Tension Envelope, EarthLink, Intuit and Dymo-Costar. A number of
these third parties are still in the process of establishing the marketing,
promotional and distribution activities for our service called for under our
agreements with them. Failure to achieve these efforts in a timely and
successful manner would limit their usefulness in promoting adoption of our
service. We expect to enter into additional marketing and distribution
relationships as our business grows and we expand our portfolio of products and
services.

We Are At An Early Stage of Commercialization, Have A Large Accumulated Deficit
And Expect To Incur Continuing Losses

   We have a very limited operating history and only began offering our
Internet postage service on a commercial basis on August 9, 1999. Through June
30, 1999, we had generated no revenues and had an accumulated deficit of $39.0
million. We have generated only nominal revenues since the recent commercial
introduction of our service. We have incurred increasing losses and had an
operating loss for the six month period ended June 30, 1999 of $12.5 million.
We expect to continue to incur net losses for the foreseeable future and may
never achieve profitable operations. The market for Internet postage has not
yet developed and we cannot assure you that it will develop or that, if it
develops, customers will use our service.

Our Market Opportunity

   In an effort to enhance customer satisfaction, provide convenient postal
services, leverage users' existing investments in computer hardware and
software and improve access to the small business, small office and home office
market, the U.S. Postal Service developed the Information Based Indicia
Program. This program is designed to authorize third party vendors to sell
products or services that enable users to print postage, also referred to as
digital stamps, from a personal computer using ordinary laser or inkjet
printers. This new form of postage provides an opportunity to access the U.S.
postage market, which represented $60 billion in 1998. Of this amount,
$38 billion was represented by postage stamps and postage meters, which are
primarily used for first class, priority and express mail, which is the target
market for Internet postage. Keenan Vision, an independent research firm,
estimates that the market for first class, priority and express mail will grow
to $46 billion by the year 2002.

   The emergence of Internet postage has created an attractive channel for the
sale of postage to small business, small office and home office users currently
underserved by existing products and services. According to International Data
Corporation, there were 44.6 million small business, small office and home
office users in the U.S. in 1998, which is expected to grow to 57.6 million by
2002. In terms of postage usage, small business, small office and home office
users generally conduct an essential part of their communications with
suppliers and customers through the postal system. Nevertheless, few small
business, small office and home office users use postage meters to automate the
mailing process. In addition, small business, small office and home office
users are increasingly adopting the Internet to improve their business
processes.

                                       2
<PAGE>


Our Growth Strategy

   Our objective is to be the leading provider of Internet postage services.
Key elements of our growth strategy include:

  . Entering into marketing and distribution relationships with industry
    leaders to quickly acquire customers, build brand recognition and
    accelerate adoption of our Internet postage service.

  . Initially focusing on the large and growing small business, small office
    and home office market.

  . Building and promoting our brand through a variety of marketing and
    promotional techniques and including our logo and Web site address on
    each digital stamp.

  . Leveraging our technology platform and expertise to develop a family of
    Internet postage services including a server-based service and an
    intranet based service to address other market segments.

  . Pursuing multiple and recurring revenue streams by capitalizing on our
    expertise in secure payment processing and the printing of authenticated
    documents to offer other products and services that could be purchased
    online and printed from the desktop, such as tickets and gift
    certificates.

  . Pursuing international Internet postage opportunities.

                                       3
<PAGE>

                                  The Offering

<TABLE>
 <C>                                <S>
 Common stock offered by E-Stamp..  6,500,000 shares
 Common stock to be outstanding
  after this offering.............  37,641,962 shares
 Use of proceeds..................  We plan to use the net proceeds from this
                                    offering principally for sales and
                                    marketing expenses, with the balance for
                                    general corporate purposes, including
                                    working capital and expansion of our
                                    corporate infrastructure.
 Nasdaq National Market symbol....  ESTM
</TABLE>

   Unless otherwise indicated, this prospectus assumes the conversion of our
outstanding preferred stock into common stock on a 1.25 for 1 basis upon the
closing of this offering, reflects a stock dividend to be made prior to
completion of this offering of one share of common stock on each four shares of
our outstanding common stock, and assumes that the underwriters do not exercise
the option granted by us to purchase additional shares in the offering to cover
over-allotments.

                                ----------------

   The number of shares of common stock to be outstanding after this offering
is based on shares outstanding as of October 1, 1999. This number excludes:

  . 2,576,229 shares of common stock reserved for future issuance under our
    stock option, director stock option and employee stock purchase plans;

  . 1,419,893 shares of common stock subject to outstanding options; and

  . 75,040 shares of common stock issuable upon the exercise of outstanding
    warrants.

                                       4
<PAGE>

                         Summary Financial Information
                     (In thousands, except per share data)

   The following table summarizes our financial data. The weighted average
shares used in calculating our pro forma net loss per share data excludes our
sale in August 1999 of shares of our convertible preferred stock for aggregate
proceeds of $30.2 million, our sale in September 1999 of shares of our common
stock with a fair value of $7.8 million for aggregate cash proceeds of $5.0
million, the exercise of warrants to purchase 83,855 shares of common stock in
September 1999 at $0.01 per share with a fair value of $1.0 million, the grant
of 187,500 shares of common stock to two of our executives in August 1999 with
a fair value of $1.8 million, and includes the automatic conversion of all
other outstanding shares of our convertible preferred stock into shares of our
common stock which will occur upon the closing of this offering.

<TABLE>
<CAPTION>
                                                             Six Months Ended
                                 Year Ended December 31,         June 30,
                                 --------------------------  -----------------
                                  1996     1997      1998     1998      1999
                                                               (unaudited)
<S>                              <C>      <C>      <C>       <C>      <C>
Statement of Operations Data:
  Net revenues.................. $   --   $   --   $    --   $   --   $    --
  Operating loss ...............  (6,575)  (7,821)  (11,080)  (4,498)  (12,543)
  Net loss......................  (6,339)  (7,678)  (10,710)  (4,455)  (12,367)
  Accretion on redeemable
   convertible
   preferred stock .............     --      (196)   (1,383)    (307)   (1,176)
  Net loss attributable to
   common stockholders.......... $(6,339) $(7,874) $(12,093) $(4,762) $(13,543)
  Net loss per common share:
    Basic and diluted........... $ (0.51) $ (0.61) $  (0.92) $ (0.37) $  (1.00)
    Weighted average shares.....  12,543   12,966    13,075   13,026    13,486
  Pro forma net loss per
   share:.......................
    Basic and diluted
     (unaudited)................                   $  (0.57)          $  (0.57)
    Weighted average shares
     (unaudited)................                     18,753             21,846
</TABLE>

   The following table summarizes our balance sheet data. The pro forma data
reflects our sale in August 1999 of shares of our convertible preferred stock
for aggregate proceeds of $30.2 million, our sale of common stock in September
1999 with a fair value of $7.8 million for aggregate cash proceeds of $5.0
million, the exercise of warrants to purchase 83,855 shares of common stock in
September 1999 at $0.01 per share with a fair value of $1.0 million, the grant
of 187,500 shares of common stock to two of our executives in August 1999 with
a fair value of $1.8 million and the automatic conversion of all outstanding
shares of our redeemable convertible preferred stock into shares of our common
stock which will occur upon the closing of this offering. The pro forma as
adjusted data reflects the sale of 6,500,000 shares of common stock in this
offering at an assumed initial public offering price of $15.00 per share, after
deducting the underwriting discount and estimated offering expenses payable by
us.

<TABLE>
<CAPTION>
                                                      As of June 30, 1999
                                                  -----------------------------
                                                              Pro    Pro Forma
                                                   Actual    Forma  As Adjusted
                                                          (unaudited)
<S>                                               <C>       <C>     <C>
Balance Sheet Data:
  Cash and cash equivalents...................... $  1,916  $37,116  $126,791
  Working capital (deficit)......................     (324)  34,876   124,551
  Total assets...................................    3,096   38,296   127,971
  Capital lease obligations, net of current
   portion.......................................        6        6         6
  Common stock subject to rescission.............    2,499    2,499     2,499
  Redeemable convertible preferred stock.........   24,645      --        --
  Total stockholders' equity (deficit)...........  (26,792)  33,053   122,728
</TABLE>

                                       5
<PAGE>

                                  RISK FACTORS

   You should carefully consider the risks described below before buying shares
in this offering.

We have a limited operating history with a history of losses, only began
offering our Internet postage service on a commercial basis in August 1999,
expect to incur losses in the future, and may never achieve profitability.

   We have a very limited operating history. You should consider our prospects
in light of the risks and difficulties frequently encountered by early stage
companies in new and rapidly evolving markets. We cannot be certain that we
will achieve profitability or, if achieved, that we will be able to sustain or
increase profitability on a quarterly or annual basis. As of June 30, 1999, we
had not generated any revenues and had an accumulated deficit of $39.0 million.
Since August 1999, we have generated only nominal revenues. We have incurred
increasing losses and had an operating loss for the six month period ended June
30, 1999 of $12.5 million. We have not achieved profitability and expect to
continue to incur net losses for the foreseeable future. We expect to incur
increasing sales and marketing, research and development and administrative
expenses. As a result, we will need to generate significant revenues to achieve
and maintain profitability.

The success of our business will depend upon acceptance by customers of our
Internet postage service.

   We expect that our Internet postage service will generate a substantial
portion, if not all, of our near-term future revenues. As a result, we depend
on the commercial acceptance of our Internet postage service. If we fail to
successfully gain commercial acceptance of our Internet postage service, we
will be unable to generate significant revenues. The market for Internet
postage has not developed, and we cannot assure you that it will develop. We
cannot predict the extent to which users will be willing to use the Internet to
purchase postage rather than using traditional methods. To the extent users
choose to purchase postage over the Internet, we cannot be certain that these
customers will use our service.

Intellectual property infringement claims, including claims asserted by Pitney
Bowes against us, could prevent or hinder our ability to sell Internet postage.

   We face the risk that other parties' intellectual property positions will
impair successful development of the Internet postage market or our ability to
effectively participate in it. Pitney Bowes filed a patent infringement lawsuit
against us in U.S. District Court in June 1999. The suit alleges infringement
of seven patents owned by Pitney Bowes related to postage application systems
and seeks treble damages, a preliminary and permanent injunction, attorneys'
fees and other unspecified damages. On July 30, 1999, we filed our answer to
Pitney Bowes' complaint. Pendency of the litigation can be expected to result
in significant expenses to us and the diversion of management time and other
resources, the extent of which cannot be quantified with any reasonable
accuracy given the early stage of this litigation. If Pitney Bowes is
successful in its claims against us, then we may be hindered or even prevented
from competing in the Internet postage market and our operations would be
severely harmed. The Pitney Bowes suit could result in limitations on how we
implement our services, delays and costs associated with redesigning our
services and payments of license fees and other monies. An injunction obtained
by Pitney Bowes could eliminate our ability to market critical products or
services.

Pitney Bowes may be unwilling to discuss licensing or cross-licensing
arrangements with us, which could adversely impact our ability to compete in
the market for Internet postage products and services.

   Although we and Pitney Bowes, prior to filing of the current litigation, had
been in discussions regarding cross-licensing a number of our patents and
Pitney Bowes' patents, some of which are identified in Pitney Bowes' complaint,
we cannot predict whether these discussions will recommence in the future or
the impact of Pitney Bowes' intellectual property claims on our business or the
Internet postage market. Since commencement of the litigation, we have not had
discussions with Pitney Bowes regarding licensing or cross-

                                       6
<PAGE>

licensing arrangements nor do we have information concerning Pitney Bowes'
present willingness to engage in discussions.

If the U.S. Postal Service discontinues Internet postage as an approved postage
method because of counterfeiting or other issues or revokes approval of our
Internet postage service, our business will fail.

   We continue to be subject to U.S. Postal Service scrutiny and other
government regulations. The U.S. Postal Service could discontinue Internet
postage as an approved postage method because of counterfeiting of Internet
postage, security or other issues, in which case our business would fail.
Further, if we are unable to successfully complete subsequent evaluations by
the U.S. Postal Service, to adapt our Internet postage service to any new
requirements or specifications or to provide adequate security, the U.S. Postal
Service could revoke its approval of our Internet postage service, in which
case our business would fail.

The commercial roll-out of our Internet postage service is currently limited to
100,000 customers and the U.S. Postal Service could continue to require
periodic reviews before authorizing greater numbers of customers.

   Under the Information Based Indicia Program, the commercial roll-out of our
Internet postage service is currently limited to 100,000 customers. The U.S.
Postal Service will evaluate our service when we obtain approximately 100,000
customers. If we do not successfully complete this evaluation, the U.S. Postal
Service could delay or even prevent use of our Internet postage service by more
than 100,000 customers. The U.S. Postal Service could continue to require
additional periodic reviews before authorizing greater numbers of customers.
Any such delay in our ability to expand our customer base would result in loss
of revenue and could harm our ability to build our brand and obtain market
acceptance of our Internet postage service.

We cannot be certain that we will be able to continue to satisfy existing, new
or changed U.S. Postal Service regulations in the future, and if we are not
able to do so our ability to distribute our Internet postage service would be
adversely affected.

   If we encounter difficulties with continuing compliance with U.S. Postal
Service regulations, our ability to distribute or extend the distribution of
our Internet postage service could be adversely affected. U.S. Postal Service
regulations may require that our personnel with access to postal information or
resources obtain security clearances. These regulations may cause delays or
disruptions in our business if our personnel cannot receive necessary security
clearances in a timely manner, or at all, and may limit our ability to hire
necessary personnel. Any other change in the current or future regulatory
environment could have an adverse impact on our business and could harm our
operating results and profitability.

Our Internet postage hardware device may interfere with the operation of some
printers, which may decrease adoption of our Internet postage service and which
has in the past resulted in, and may in the future result in, product returns.

   Our secure Internet postage device in some cases interferes with the
operation of multifunction printers, which combine printing, faxing, copying
and scanning functions and bi-directional printers and is generally unable to
print postage on these types of printers. We believe a significant number of
our product returns to date may have been prompted by this incompatibility. If
we are unable to successfully modify our secure Internet postage device or
software to solve these issues, it will severely harm our ability to market our
Internet postage service to users of multifunctional and bi-directional
printers.

If we cannot successfully manage the commercial availability of our Internet
postage service, our ability to attract and retain customers will be harmed.

   Our reputation and our ability to attract, retain and provide services to
our customers depend upon the reliable performance of our Web site, network
infrastructure and transaction-processing systems. If we are unable at any time
to provide our customers with our Internet postage service in a satisfactory
manner, our

                                       7
<PAGE>

customers may become dissatisfied and could cease using our Internet postage
service. We have very limited experience conducting marketing campaigns, and we
may fail to generate significant interest in our Internet postage service. On
the other hand, if we generate extensive interest in our service, we cannot
assure you that we will be able to effectively manage commercial availability
of our Internet postage service due to the strains this demand will place on
our Web site, network infrastructure and our transaction-processing systems.

If we are unable to maintain and develop our marketing and distribution
relationships, our Internet postage service may not achieve commercial
acceptance.

   We have established marketing and distribution relationships with a limited
number of third parties. We rely heavily upon these relationships to build our
E-Stamp brand and to accelerate the adoption of our Internet postage service.
We have limited experience in establishing and maintaining these relationships.
If we are unable to successfully maintain our existing relationships or to
establish new relationships, our Internet postage service may not achieve
commercial acceptance. In addition, a number of these third parties are still
in the process of establishing the marketing, promotional and distribution
activities for our service called for under our agreements with them. We cannot
assure you that these efforts will be achieved in a timely and successful
manner and this would limit their usefulness in promoting adoption of our
service.

If we do not achieve broad brand recognition, our ability to attract customers
will suffer dramatically.

   We must quickly build our E-Stamp brand to gain market acceptance for our
service. If we fail to gain market acceptance for our Internet postage service,
our ability to attract customers will suffer dramatically. We believe it is
imperative to our long term success that we obtain significant acceptance of
our service. We cannot be certain that we will have sufficient resources to
build our brand and achieve commercial acceptance of our service. To establish
our brand awareness, we must invest substantial resources to develop our
products, pursue marketing and distribution relationships, implement marketing
initiatives, and provide a high quality experience to our users.

Subsequent Internet postage services, if successfully developed by us, will
require additional U.S. Postal Service approvals that may delay their
commercial introduction.

   We have not begun the U.S. Postal Service approval process for future
services we have under development, including our server-based service. Our
current Internet postage service took approximately 18 months to complete the
beta test portion of the U.S. Postal Service's approval process. We cannot
assure you of the duration of the approval process for our server-based or any
subsequent service, or that these services will ever be approved by the U.S.
Postal Service. Further, we cannot assure you that we will be able to
successfully develop our future services in a timely manner or at all. Failure
to timely receive U.S. Postal Service approval for our server-based service or
subsequent services could limit our ability to successfully grow our business.

We have experienced significant growth in our expenses and operations in recent
periods, and any failure to manage this growth could damage our ability to
obtain market acceptance for our Internet postage service.

   Our ability to successfully offer our Internet postage service and implement
our business plan requires an effective planning and management process. We
have increased, and plan to continue to increase, the scope of our operations
and have experienced, and expect to continue to experience, significant growth
in our expenses and operations. If we are unable to manage growth effectively
or experience disruptions during our expansion, our ability to market and
extend distribution of our Internet postage service and our ability to develop
future services will be seriously harmed. To manage the expected growth of
operations and personnel, we will need to improve existing and implement new
transaction-processing, operational and financial systems, procedures and
controls. In addition, we will need to expand, train and manage an increasing
employee base and to expand our finance, administrative and operations staff.
Our current expansion has placed, and we expect our future expansion to

                                       8
<PAGE>

continue to place, a significant strain on our managerial, operational and
financial resources. Our current and planned personnel, systems, procedures and
controls may be inadequate to support our future operations.

If the sole supplier of our Internet postage hardware device is unable to
timely meet our commercial supply needs, our ability to expand our customer
base will be severely limited and we will lose revenue.

   Dallas Semiconductor Corporation is the single source of supply for our
secure Internet postage device. We do not have a guaranteed supply arrangement
with Dallas Semiconductor, and we order such devices on a purchase order basis.
Any difficulties encountered by our sole supplier that result in product
defects, production delays, cost overruns, or the inability to fulfill orders
on a timely basis would hurt our reputation and result in loss of revenue. If
we cannot obtain an adequate supply of our Internet postage device, we will be
unable to timely deliver our Internet postage device to customers and, without
the device, customers would be unable to purchase postage using our Internet
postage service. Neither we nor our supplier maintain an extensive inventory of
our Internet postage device. We cannot assure you that our supplier will timely
meet our commercial supply needs or that alternative suppliers will be
available in the future. We have not qualified any alternative sources for the
supply of our secure Internet postage device.

System failures could harm our reputation, result in loss of revenue and
substantially and adversely affect our ability to attract or retain customers.

   Our business and reputation with customers depend upon the efficient and
uninterrupted operation of our Web site, processing systems and network
infrastructure, including critical portions of this infrastructure that are
hosted by third parties, for registration of new customers and processing of
Internet postage transactions. In addition, our service depends upon continuous
operation of the U.S. Postal Service's secure postage accounting vault for our
customers to purchase postage. We have experienced system failure for short
periods of up to four hours during initial commercial launch of our service and
we may suffer additional interruptions in our service. Problems or system
failures at either our location or third party locations could result in
interruptions in our service. Unscheduled downtime of our service may result in
loss of revenue and if these system failures persist, our business, reputation
and brand could be severely harmed. We cannot assure you that we will be able
to timely expand our systems infrastructure to support growth in traffic from
our customers.

Our systems and those hosted by third parties are vulnerable to damage or
interruption which could harm our reputation and result in a loss of revenue.

   Our systems and those hosted by third parties are vulnerable to damage or
interruption as a result of fire, flood, power loss, telecommunications
failure, software errors or bugs, hardware failures or computer viruses,
computer hacking and other acts of misconduct, earthquakes and similar events.
Our postage processing systems are located in Northern California, a
seismically active region. We do not have fully redundant systems, a formal
disaster recovery plan or alternative providers of hosting services, and we do
not carry sufficient business interruption insurance to compensate us for
losses that may occur. Despite any precautions we may take, problems or system
failures at our third party hosted facilities could result in interruptions in
our service which could injure our reputation and cause us to lose revenue.

The inability to expand our system's capacity may limit our growth.

   Our inability to add additional software and hardware or to upgrade our
technology, transaction processing systems or network infrastructure to timely
accommodate increased Web site traffic or transaction volume could have adverse
consequences. These consequences include unanticipated system disruptions,
slower response times, degradation in levels of customer support and impaired
quality of the user's experience on our service and delays in reporting
accurate financial information. We may be unable to effectively upgrade and
expand our systems in a timely manner or to integrate smoothly any newly
developed or purchased technologies with our existing systems. These
difficulties could harm or limit our ability to expand our business.


                                       9
<PAGE>

If we are unable to provide new features or functionality to our technology,
transaction processing systems or network infrastructure, our growth may be
limited.

   Our failure to provide new features or functionality to our technology,
transaction processing systems or network infrastructure could adversely affect
demand for our Internet postage service, which would harm or limit our ability
to expand our business.

We rely heavily upon third parties to market and distribute our Internet
postage service to customers.

   We rely upon third parties to market and distribute our Internet postage
service. We cannot assure you that we will be able to develop and maintain
satisfactory relationships with such parties on acceptable commercial terms, if
at all, or that we will be able to obtain adequate distribution channels for
our service. Our marketing and distribution relationships with third parties,
which include providing links to our website and distributing our product
through bundling arrangements, may not generate significant traffic on our
website or otherwise generate significant interest in our service. We cannot
assure you that office supply, computer or other retailers will carry our
product or devote sufficient marketing, shelf space or other resources to it.
If we are unable to provide an adequate distribution channel for our Internet
postage service, customers will have difficulty purchasing our product through
retail channels which would severely harm our ability to grow our business. We
depend upon the U.S. Postal Service and other delivery services for the
delivery of our secure postage device. Strikes or other service interruptions
affecting delivery services used by us would have a material adverse effect on
our ability to deliver our Internet postage service to our customers.

The Internet postage market is highly competitive and we may be unable to
compete successfully against new entrants and established industry competitors
with significantly greater financial resources.

   The market for Internet postage products and services is new, rapidly
evolving and intensely competitive. We expect that our primary competitors will
include traditional providers of postage products and services, including
Pitney Bowes and Neopost, that have longer operating histories, larger customer
bases, greater brand recognition, greater financial, marketing, service,
support, technical, intellectual property and other resources than us. We will
also compete with providers of traditional postage products and delivery
services, such as the U.S. Postal Service, Federal Express and United Parcel
Service. In addition to providers of traditional postage products and services,
we compete with three other Information Based Indicia Program vendors, Neopost,
Pitney Bowes and Stamps.com, who have all initiated the certification process
with the U.S. Postal Service. Only one of these, Stamps.com, has been approved
for commercial release by the U.S. Postal Service to date. Many of our
competitors may be able to devote greater resources to marketing and
promotional campaigns, adopt more aggressive pricing policies and devote
substantially more resources to Web site and systems development than us. This
increased competition may result in reduced operating margins, loss of market
share and a diminished brand recognition.

A breach of our online security would harm our reputation and could interrupt
service to our customers.

   A fundamental requirement to conduct electronic commerce is the secure
transmission of information over public networks. We rely on encryption and
authentication technology to provide the security necessary for transmission of
postage and other confidential information. Any breach of these security
measures would severely impact our reputation and would likely result in the
loss of customers. Advances in computer capabilities, new discoveries in the
field of cryptography, or other events or developments may result in a
compromise or breach of the algorithms we use to protect customer transaction
data. Security breaches could also expose us to a risk of loss or litigation
and possible liability for failing to secure confidential customer information.
Accordingly, we may be required to expend significant capital and other
resources to protect against potential security breaches or to alleviate
problems caused by any breach.

                                       10
<PAGE>

If we are unable to successfully protect our intellectual property, our
competitive position will be harmed.

   We rely on a combination of patent, trademark, service mark, copyright and
trade secret laws, contractual restrictions on disclosure and transferring
title and other methods in an effort to establish and protect proprietary
rights in our services, know-how and information. If our patents or other
intellectual property fail to protect our technology, our competitive position
could be harmed. In addition, third parties may develop alternative
technologies or products that do not infringe on any of our patents or other
intellectual property. Steps taken to protect our intellectual property may not
be sufficient to prevent misappropriation of technology or deter independent
third party development of similar technologies. Additionally, the laws of
foreign countries may not protect our services or intellectual property rights
to the same extent as do the laws of the United States.

Continued adoption of the Internet as a method of conducting business is
necessary for our future growth.

   The failure of the Internet to continue to develop as a medium for the
purchase of goods and services would adversely affect the willingness or
ability of users to use the Internet to purchase postage. Concerns over the
security of transactions conducted on the Internet and the privacy of consumers
may also inhibit the growth of the Internet and other online services
generally, and online commerce in particular. A decline in the growth of the
Internet could decrease demand for our services and increase our cost of doing
business. We cannot assure you that the Internet will continue to be widely
accepted and adopted for purchasing goods and services.

Failure to expand Internet infrastructure could limit our future growth.

   The recent growth in Internet traffic has caused frequent periods of
decreased performance, and if Internet usage continues to grow rapidly, the
Internet's infrastructure may not be able to support these demands and its
performance and reliability may decline. If outages or delays on the Internet
occur frequently or increase in frequency, overall Web usage, including usage
of our Web site to purchase Internet postage, could grow more slowly or
decline. Our ability to increase the speed and scope of our services to users
is ultimately limited by and dependent upon the speed and reliability of the
Internet.

Our quarterly results are subject to significant fluctuations, and our stock
price may decline if we do not meet expectations.

   Since August 1999, we have generated only nominal revenues from our
operations. Accordingly, we have little basis upon which to predict future
operating results. We expect that our revenues, margins and operating results
will fluctuate significantly due to a variety of factors. Factors affecting our
quarterly results include:

  .  the costs of our marketing programs to establish the E-Stamp brand name
     and generate market demand for our Internet postage service;

  .  timing of the commercial release of additional Internet postage services
     developed by us, which depends in part on the timing of U.S. Postal
     Service approval for any such services;

  .  the number, timing and significance of new products or services
     introduced by our competitors, which are outside our control;

  .  the level of service and price competition;

  .  changes in our operating expenses as we expand operations; and

  .  general economic factors, which are outside our control.

   Timing of commercial release of new products or services by us and our
competitors and general economic factors will also affect our long-term
financial results. Substantially all of our operating expenses are

                                       11
<PAGE>

related to personnel costs, marketing programs and overhead, which cannot be
adjusted quickly and are therefore relatively fixed in the short term. Our
operating expense levels are based, in significant part, on our expectations of
future revenues. If our expenses precede increased revenues, both gross margins
and results of operations could be harmed because of increased costs and
expenses in the short term. Due to the foregoing factors and the other risks
discussed in this prospectus, you should not rely on period-to-period
comparisons of our results of operations as an indication of future
performance. It is possible that in some future periods our results of
operations will be below public expectations. In this event, the market price
of our common stock is likely to fall.

We depend on key personnel and attracting qualified employees for our future
success.

   Our success depends to a significant degree upon the continued contributions
of our executive management team and other senior level financial, technical,
marketing and sales personnel. Our key employees consist of Robert H. Ewald,
our President and Chief Executive Officer, Nicole Eagan, our Senior Vice
President, Marketing and Sales, and Anthony H. Lewis, Jr., our Vice President
and Chief Financial Officer. The loss of the services of any of these key
employees or other members of our senior management team could have a material
adverse effect on our business and results of operations. We anticipate that
the number of our employees may increase significantly during the next 12
months as we increase our research and development activities and sales and
marketing efforts. Our success depends upon our ability to attract and retain
additional highly qualified senior management and technical, sales and
marketing personnel to support planned growth of our operations. Competition
for qualified employees is intense, particularly in the Internet and high
technology industries. The process of locating and hiring personnel with the
combination of skills and attributes required to carry out our strategy is
time-consuming and costly. The loss of key personnel or our inability to
attract additional qualified personnel to supplement or, if necessary, to
replace existing personnel, could have a material adverse effect on our
business and results of operations.

Rapid technological change may make our Internet postage service obsolete or
cause us to incur substantial costs to adapt to these changes.

   The use of the Internet for the purchase and sale of goods and services is
characterized by rapidly changing technology, evolving industry standards and
frequent new product announcements. To be successful, we must adapt to these
rapid changes by continually improving the performance, features and
reliability of our products and services, and to develop new products and
services, or else our products and services may become noncompetitive or
obsolete. We also could incur substantial costs to modify our service or
infrastructure and to develop new products and services, in order to adapt to
these changes. Our business, operating results and financial condition could be
harmed if we incur significant costs without adequate results, or find
ourselves unable to adapt rapidly to these changes.

We may be unable to effectively manage any future acquisitions of new or
complementary businesses, products or technology.

   We may pursue the acquisition of new or complementary businesses, including
individual products or technologies, in an effort to enter into new markets,
diversify our sources of revenue and expand our services. At present, we have
no commitments or agreements and are not currently engaged in discussions for
any material acquisitions or investments. To the extent we pursue new or
complementary businesses, we may not be able to expand our services and related
operations in a cost-effective or timely manner. We may experience increased
costs, delays and diversions of management's attention when integrating any new
businesses. We may lose key personnel from our operations or those of any
acquired business. Furthermore, any new business or service we launch that is
not favorably received by users could damage our reputation and brand name. We
also cannot be certain that we will generate satisfactory revenues from any
expanded services to offset related costs. Any expansion of our operations
would also require significant additional expenses, and these efforts may
strain our management, financial and operational resources. Additionally,
future acquisitions may also

                                       12
<PAGE>

result in potentially dilutive issuances of equity securities, the incurrence
of additional debt, the assumption of known and unknown liabilities, and the
amortization of expenses related to goodwill and other intangible assets, all
of which could harm our business, financial condition and operating results.

Internet postage cannot currently be used internationally which may limit our
future growth.

   At present, Internet postage approved by the U.S. Postal Service can only be
used to send mail from one United States address to another. Unless and until
foreign postal authorities create a certification process and recognize
information-based indicia postage, our Internet postage service will not be
able to address foreign markets which may limit our future growth. Efforts in
Europe and other foreign markets related to adoption of Internet postage are at
a very preliminary stage. We cannot assure you that foreign postal authorities
will adopt policies and processes for Internet postage that are compatible with
those approved by the U.S. Postal Service on a timely basis or at all.

If we market our services internationally, regulation by international agencies
could disrupt our operations.

   If foreign postal authorities in the future accept postage generated by our
services and if we obtain the necessary foreign certification or approvals, we
would be subject to ongoing regulation by international governments and
agencies. If we achieve significant international acceptance of our services,
our business activities will be subject to a variety of potential risks,
including the adoption of laws and regulatory requirements, political and
economic conditions, difficulties protecting our intellectual property rights
and actions by third parties that would restrict or eliminate our ability to do
business in some jurisdictions. If we begin to transact business in foreign
currencies, we will become subject to the risks attendant to transacting in
foreign currencies, including the potential adverse effects of exchange rate
fluctuations.

If we do not adequately address "Year 2000" issues, we may incur significant
costs and our reputation and ability to gain market acceptance for our Internet
postage service could suffer.

   Failure of our internal computer systems or third-party equipment or
software, or systems maintained by our users and third parties with whom we
have marketing or distribution agreements, to operate properly with regard to
the Year 2000 issues could require us to incur significant unanticipated
expenses to remedy any problems and could cause system interruptions and loss
of data. Any of these events could harm our reputation and materially and
adversely affect our ability to gain market acceptance for our Internet postage
service. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations--Year 2000 Compliance."

We may need additional capital and failure to obtain such capital could harm
our ability to market our Internet postage service and to develop future
services.

   We require substantial working capital to fund our business. We cannot be
certain that additional financing will be available to us on favorable terms
when required, or at all. Since our inception, we have experienced negative
cash flow from operations and expect to experience significant negative cash
flow from operations in the future. We currently anticipate that the net
proceeds of this offering, together with our available funds, will be
sufficient to meet our anticipated needs for working capital and capital
expenditures through at least the next 12 months. The estimate of the time
period during which these proceeds will be sufficient is a forward-looking
statement that is subject to risks and uncertainties. Our actual funding
requirements may differ materially from this as a result of the number of
factors, including our plans to fully support the commercial release and
support of our Internet postage service, our development and introduction of
new services and our investments in expanding our systems infrastructure and
staffing. We may need to raise additional funds prior to the end of the next 12
months or at a later date.


                                       13
<PAGE>

Our payment obligations under our marketing and distribution agreements could
increase.

   Our aggregate payment obligations under our existing agreements with Yahoo!,
Microsoft, Earthlink, Excite@Home and Intuit total approximately $5.5 million
during the second half of 1999, $10.5 million during the year 2000, and $2.4
million during the year 2001. We have also agreed to pay approximately $1.3
million to an Internet service provider, and have agreed to pay Compaq
royalties.We could be required to make additional payments under our agreements
with these parties if advertising exceeds established levels of page views or
generates and exceeds established levels of new customers.

Regulatory and legal uncertainties could inhibit development of the Internet as
a marketplace for electronic commerce services.

   A number of laws and regulations may be adopted with respect to the Internet
relating to user privacy, pricing, content, copyrights, distribution, and
characteristics and quality of products and services that could adversely
affect adoption of the Internet for electronic commerce services, which would
harm our ability to attract and retain customers. Moreover, the applicability
of existing laws to the Internet is uncertain with regard to many issues such
as property ownership, export of encryption technology, sales tax, libel and
personal privacy. The application of laws and regulations from jurisdictions
whose laws do not currently apply to our business or the application of
existing laws and regulations to the Internet and other online services could
adversely affect demand for our Internet postage service and could increase our
cost of doing business.

U.S. Postal Service regulations require a user of our Internet postage service
to print both the destination address and the digital stamp, which will
discourage use of our Internet postage service to print digital stamps for use
with pre-printed return envelopes.

   U.S. Postal Service regulations require a user of our Internet postage
service to print both the destination address and the digital stamp. We have
found that many users will not take the time to type in destination addresses
to print a digital stamp for use with pre-printed payment envelopes. In
addition, the digital stamp is too large to fit on many return envelopes. As a
result, users will generally not use our service to print digital stamps for
return envelopes. In addition, our Internet postage service cannot be used to
print digital stamps for handwritten envelopes.

Our Internet postage will not print unless the U.S. Postal Service address
verification CD-ROM is loaded in the drive of the user's personal computer and
verifies the destination address.

   The U.S. Postal Service requires that each digital stamp be encoded with the
destination address, which must be verified by the U.S. Postal Service's
address verification CD-ROM before the digital stamp is printed. Destination
addresses in the U.S. Postal Service database are subject to change as persons
or businesses establish a new address or for other reasons. As a result, we
will be required to periodically mail to users of our service updated address
verification CD-ROMs. Until an updated CD-ROM is received, a user will be
unable to print a digital stamp for a new address that was not included in the
U.S. Postal Service database at the time the existing CD-ROM was manufactured.

Shares eligible for future sale by our existing stockholders may adversely
affect our stock price.

   If our stockholders sell substantial amounts of our common stock, including
shares issued upon the exercise of outstanding options, in the public market
following this offering, the market price of our common stock could fall. In
addition, such sales could create the perception to the public of difficulties
or problems with our products and services. As a result, these sales also might
make it more difficult for us to sell equity or equity-related securities in
the future at a time and price that we deem appropriate.

   Upon completion of this offering, we will have outstanding 37,641,962 shares
of common stock, assuming no exercise of the underwriters' over-allotment
option and no exercise of outstanding options or warrants after

                                       14
<PAGE>

October 1, 1999. Of these shares, the shares sold in this offering are freely
tradable. The remaining 31,141,962 shares will become eligible for sale in the
public market as follows:

<TABLE>
<CAPTION>
   Number of
     Shares   Date of Availability for Sale
   <C>        <S>
    2,097,632 At the date of this prospectus

      113,576 90 days after the date of this prospectus

   19,854,064 180 days after the date of this prospectus subject to
              restrictions under the federal securities laws

    9,076,690 More than 180 days after the date of this prospectus,
              subject to restrictions under the federal securities
              laws
</TABLE>

We have broad discretion to use the proceeds from this offering and may not use
the proceeds effectively.

   The majority of the net proceeds of this offering are not allocated for
specific uses other than sales and marketing expenditures, working capital and
general corporate purposes. Thus, our management has broad discretion over how
these proceeds are used and could spend most of these proceeds in ways with
which our stockholders may not agree. We cannot assure you that the proceeds
will be invested in a way that yields a favorable return.

Our securities have no prior market and our stock price may decline after the
offering.

   Before this offering, there has not been a public market for our common
stock and an active public market for our common stock may not develop or be
sustained after this offering. The initial public offering price will be
determined by negotiations between E-Stamp and the representatives of the
underwriters, and we cannot assure you that the trading market price of our
common stock will not decline below the initial public offering price.

On September 10, 1999, we sold 726,745 shares of our common stock to affiliates
of Deutsche Post and Deutsche Telekom at a price of $6.88 per share, which is
less than half of our assumed initial offering price of $15.00 per share.

   On September 10, 1999, we sold 726,745 shares of our common stock to
affiliates of Deutsche Post and Deutsche Telekom at a price of $6.88 per share.
The price paid by the affiliates of Deutsche Post and Deutsche Telekom is less
than half of our assumed initial public offering price of $15.00 per share, and
we cannot assure you that the trading market price of our common stock will not
decline below the initial public offering price.

Internet related stock prices are especially volatile and this volatility could
cause our stock price to fluctuate dramatically which could result in
substantial losses to investors.

   The stock market and specifically the stock of Internet related companies
have been very volatile. This broad market volatility and industry volatility
may reduce the price of our common stock, because our business is Internet-
based without regard to our operating performance. In particular, following
initial public offerings, the market prices for stock of Internet related
companies often reach levels that bear no relation to the operating performance
of these companies. The market prices are generally not sustainable and could
vary widely. If our common stock trades to high levels following this offering,
it could eventually experience a significant decline.

                                       15
<PAGE>

Shares issued, and option grants made, under our 1996 stock plans and our 1999
stock plan violated the registration requirements of federal and state
securities laws.

   Shares issued and options granted under our 1996 Stock Option and Restricted
Stock Plan, our 1996 Non-Employee Director Stock Plan and our 1999 Stock Plan
violated state and federal securities laws because these stock issuances and
option grants were not exempt from registration or qualification under federal
and state securities laws and registration or qualification was not obtained.
If the rescission offer that we intend to make to the holders of these shares
and options beginning approximately 30 days after the effective date of this
offering is accepted, we could be required to make aggregate payments to the
holders of these shares and options of up to $6.9 million plus statutory
interest. We currently expect to use a portion of the proceeds from this
offering to make such payments. Federal securities laws do not expressly
provide that a rescission offer will terminate a purchaser's right to rescind a
sale of stock which was not registered as required. If any or all of the
offerees reject the rescission offer, we may continue to be liable under
federal and state securities laws for up to an aggregate amount of
approximately $6.9 million plus statutory interest. See "Rescission Offer."

                                       16
<PAGE>

                                USE OF PROCEEDS

   Our net proceeds from the sale of the 6,500,000 shares of common stock
offered hereby are estimated to be $89.7 million, based on an assumed initial
public offering price of $15.00 per share and after deducting the underwriting
discount and estimated offering expenses. If the underwriters' over-allotment
option is exercised in full, our net proceeds will be approximately $103.3
million.

   We expect to use approximately 65% of the net proceeds for sales and
marketing expenditures related to promoting our Internet postage service,
building E-Stamp brand recognition, and developing additional marketing and
distribution relationships, with the remaining 35% being used for general
corporate purposes, including working capital, satisfaction of our potential
obligations under the rescission offer and expansion of our corporate
infrastructure. In addition, we may use a portion of the net proceeds to
acquire complementary products, technologies or businesses; however, we
currently have no commitments or agreements and are not involved in any
negotiations to do so. Pending use of the net proceeds of this offering, we
intend to invest the funds in short-term, interest-bearing, investment-grade
securities.

                                DIVIDEND POLICY

   We have never declared or paid any cash dividends on our capital stock. We
currently expect to retain future earnings, if any, for use in the operation
and expansion of our business and do not anticipate paying any cash dividends
in the foreseeable future.

                             CORPORATE INFORMATION

   We were incorporated in Delaware in August 1996. Prior to that time, we
conducted operations as Post N Mail, L.L.C., a Texas limited liability company
formed in April 1994. Post N Mail was merged into E-Stamp in September 1996.
Our principal executive offices are located at 2855 Campus Drive, Suite 100,
San Mateo, California 94403 and our telephone number is (650) 554-8454. Our Web
site is located at http://www.e-stamp.com. Information contained on our Web
site does not constitute part of this prospectus.

                           FORWARD-LOOKING STATEMENTS

   This prospectus contains forward-looking statements that involve risks and
uncertainties. We use words such as "anticipates," "believes," "plans,"
"expects," "future," "intends" and similar expressions to identify such
forward-looking statements. This prospectus also contains forward-looking
statements attributed to third parties relating to their estimates regarding
the growth of Internet usage, business-to-business, business-to-consumer
electronic commerce, postage usage, small office-home offices and related
service markets and spending. You should not place undue reliance on these
forward-looking statements. Our actual results could differ materially from
those anticipated in these forward-looking statements for many reasons,
including the risks faced by us described in "Risk Factors" and elsewhere in
this prospectus.

                                       17
<PAGE>

                                 CAPITALIZATION

   The following table sets forth the following information:

  .  our actual capitalization as of June 30, 1999, which reflects a stock
     dividend to be made prior to the completion of this offering of one
     share of common stock on each four shares of our outstanding common
     stock;

  .  our pro forma capitalization after giving effect to our sale of 726,745
     shares of common stock with a fair value of $7.8 million in September
     1999 for aggregate cash proceeds of $5.0 million, our sale of 2,928,521
     shares of convertible preferred stock in August 1999, convertible into
     3,660,651 shares of common stock, for an aggregate purchase price of
     $30.2 million, the exercise of warrants to purchase 83,855 shares of
     common stock at $0.01 per share in September 1999 with a fair value of
     $1.0 million, the grant of 187,500 shares of common stock to two of our
     executives in August 1999 with a fair value of $1.8 million, the
     automatic conversion of all outstanding shares of redeemable convertible
     preferred stock into shares of common stock on a 1.25-for-1 basis which
     will occur upon the closing of this offering; and

  .  our pro forma as adjusted capitalization to give effect to the sale of
     6,500,000 shares of common stock at an assumed initial public offering
     price of $15.00 per share in this offering, after deducting the
     underwriting discount and estimated offering expenses payable by us.

<TABLE>
<CAPTION>
                                                     As of June 30, 1999
                                                  ----------------------------
                                                                        Pro
                                                              Pro     Forma As
                                                   Actual    Forma    Adjusted
                                                  (In thousands, except par
                                                         value data)
<S>                                               <C>       <C>       <C>
Capital lease, net of current portion............ $      6  $      6  $      6
Common stock subject to rescission, $0.001 par
 value per share, 3,844 issued and outstanding,
 actual, pro forma and pro forma as adjusted.....    2,499     2,499     2,499
Preferred stock; $0.001 par value, issuable in
 series, 12,000 authorized shares actual and pro
 forma; 10,000 authorized pro forma as adjusted:
  Series A redeemable convertible preferred
   stock; 2,500 authorized shares, issued and
   outstanding, actual; no shares issued or
   outstanding, pro forma and pro forma as
   adjusted......................................    7,084        --        --
  Series B redeemable convertible preferred
   stock; 4,188 shares authorized, issued and
   outstanding, actual; no shares authorized,
   issued or outstanding, pro forma and pro forma
   as adjusted...................................   17,561        --        --
Stockholders' equity (deficit):
  Common stock, par value $0.001; 100,000 shares
   authorized, 12,950 shares issued and
   outstanding, actual; 200,000 shares
   authorized, 25,969 shares issued and
   outstanding, pro forma; 200,000 shares
   authorized, 32,469 shares issued and
   outstanding, pro forma as adjusted............       13        26        33
  Additional paid-in capital.....................   22,563    87,995   177,663
  Notes receivable from employees and officers...   (2,157)   (2,157)   (2,157)
  Prepaid marketing costs........................      --     (3,800)   (3,800)
  Deferred stock compensation....................  (14,427)  (14,427)  (14,427)
  Deficit accumulated during development stage...  (32,784)  (34,584)  (34,584)
                                                  --------  --------  --------
    Total stockholders' equity (deficit).........  (26,792)   33,053   122,728
                                                  --------  --------  --------
Total capitalization............................. $    358  $ 35,558  $125,233
                                                  ========  ========  ========
</TABLE>

   This table excludes the following shares:

  .  804,093 shares of common stock reserved for future issuance under our
     stock option plans as of June 30, 1999; and

  .  1,286,250 shares of common stock subject to outstanding options as of
     June 30, 1999 with an average exercise price of $0.72 per share of which
     options as to 1,056,195 shares had been exercised subsequent to June 30,
     1999.

                                       18
<PAGE>

                                    DILUTION

   The pro forma net tangible book value of our common stock on June 30, 1999,
after giving effect to the conversion of all outstanding shares of our
convertible preferred stock on a 1.25-for-1 basis, our sale of 726,745 shares
of common stock in September 1999 for an aggregate cash proceeds of $5.0
million, our sale of 2,928,521 shares of convertible preferred stock in August
1999, convertible into 3,660,651 shares of common stock, for an aggregate
purchase price of approximately $30.2 million, the exercise of warrants to
purchase 83,855 shares of common stock at $0.01 per share in September 1999,
and the grant of 187,500 shares of common stock to two of our executives in
August 1999, was $35.6 million, or approximately $1.27 per share. Pro forma net
tangible book value per share represents the amount of our total tangible
assets less total liabilities, divided by the number of shares of common stock
outstanding. Dilution in net tangible book value per share represents the
difference between the amount per share paid by purchasers of shares of our
common stock in this offering and the net tangible book value per share of our
common stock immediately afterwards. After giving effect to our sale of
6,500,000 shares of common stock offered by this prospectus at an assumed
initial public offering price of $15.00 per share and after deducting the
underwriting discount and estimated offering expenses payable by us, our net
tangible book value would have been approximately $113.1 million, or $3.78 per
share. This represents an immediate increase in net tangible book value of
$2.51 per share to existing stockholders and an immediate dilution in net
tangible book value of $11.22 per share to new investors purchasing shares of
common stock in this offering. The following table illustrates this dilution.

<TABLE>
<S>                                                                <C>   <C>
Assumed initial public offering price per share..................        $15.00
Pro forma net tangible book value per share as of June 30, 1999..  $1.27
Increase per share attributable to new investors.................   2.51
                                                                   -----
As adjusted pro forma net tangible book value per share after the
 offering........................................................          3.78
                                                                         ------
Dilution in pro forma net tangible book value per share to new
 investors.......................................................        $11.22
                                                                         ======
</TABLE>

   This table excludes all options and warrants that will remain outstanding
upon completion of this offering. As of June 30, 1999, there were options
outstanding to purchase a total of 1,286,250 shares of common stock with an
average exercise price of $0.72 per share. See Notes 4 and 10 of Notes to
Financial Statements. The exercise of outstanding options and warrants having
an exercise price less than the offering price would increase the dilutive
effect to new investors.

   The following table sets forth, as of June 30, 1999, on the pro forma basis
described above, the differences between the number of shares of common stock
purchased from us, the total price paid and average price per share paid by
existing stockholders and by the new investors in this offering at an assumed
initial public offering price of $15.00 per share, before deducting the
underwriting discount and estimated offering expenses payable by us.

<TABLE>
<CAPTION>
                            Shares Purchased  Total Consideration
                           ------------------ -------------------- Average Price
                             Number   Percent    Amount    Percent   Per Share
<S>                        <C>        <C>     <C>          <C>     <C>
Existing stockholders..... 29,812,501   82.1% $ 76,740,000   44.0%    $ 2.57
New investors.............  6,500,000   17.9%   97,500,000   56.0%     15.00
                           ----------  -----  ------------  -----
  Total................... 36,312,501  100.0% $174,240,000  100.0%
                           ==========  =====  ============  =====
</TABLE>

   If the underwriters over-allotment option is exercised in full, the
following will occur:

  . the number of shares of common stock held by existing stockholders will
    represent approximately 79.8% of the total number of shares of our common
    stock outstanding after this offering, and

  . the number of shares held by new public investors will increase to
    7,475,000 or approximately 20.2% of the total number of shares of our
    common stock outstanding after this offering.

                                       19
<PAGE>

                            SELECTED FINANCIAL DATA
                     (In thousands, except per share data)

   The statement of operations data for the years ended December 31, 1996, 1997
and 1998, and the balance sheet data as of December 31, 1997 and 1998 are
derived from our financial statements, which have been audited by Ernst & Young
LLP, independent auditors and are included elsewhere in this prospectus. The
statement of operations data for the period since inception (April 26, 1994)
through December 31, 1994 and for the year ended December 31, 1995 and the
balance sheet data as of December 31, 1994, 1995 and 1996 are derived from
audited financial statements not included in this prospectus. The financial
data as of and for the six months ended June 30, 1998 and 1999 are derived from
unaudited financial statements included elsewhere in this prospectus. We have
prepared this unaudited information on the same basis as the audited financial
statements and have included all adjustments, consisting only of normal
recurring adjustments, that we consider necessary for a fair presentation of
our financial position and operating results for such periods. When you read
this selected financial data, it is important that you also read the historical
financial statements and related notes included in this prospectus, as well as
the section of this prospectus related to "Management's Discussion and Analysis
of Financial Condition and Results of Operations." Historical results are not
necessarily indicative of future results.

<TABLE>
<CAPTION>
                            Period from
                             Inception                                          Six Months Ended
                          (April 26, 1994)     Year Ended December 31,              June 30,
                          through Dec. 31, -----------------------------------  -----------------
                                1994        1995     1996     1997      1998     1998      1999
<S>                       <C>              <C>      <C>      <C>      <C>       <C>      <C>
Statement of Operations
 Data:
Net revenues............       $   --      $    --  $    --  $    --  $     --  $    --  $     --
Operating expenses:
  Research and
   development..........          378          701    2,387    3,916     5,603    2,458     5,225
  Sales and marketing...           34           96    1,761    1,743     2,722    1,137     2,494
  General and
   administrative.......          160          532    1,739    1,748     1,897      903     1,373
  Amortization of
   deferred stock
   compensation.........           --           --      688      414       858       --     3,451
                               ------      -------  -------  -------  --------  -------  --------
Operating loss..........         (572)      (1,329)  (6,575)  (7,821)  (11,080)  (4,498)  (12,543)
Interest income
 (expense), net.........           --          (17)     236      143       370       43       176
                               ------      -------  -------  -------  --------  -------  --------
Net loss................         (572)      (1,346)  (6,339)  (7,678)  (10,710)  (4,455)  (12,367)
Accretion on redeemable
 convertible preferred
 stock..................          --           --       --      (196)   (1,383)    (307)   (1,176)
                               ------      -------  -------  -------  --------  -------  --------
Net loss attributable to
 common stockholders....        $(572)     $(1,346) $(6,339) $(7,874) $(12,093) $(4,762) $(13,543)
                               ======      =======  =======  =======  ========  =======  ========
Net loss per common
 share (basic and
 diluted)...............       $(0.05)     $ (0.11) $ (0.51) $ (0.61) $  (0.92) $ (0.37) $  (1.00)
                               ======      =======  =======  =======  ========  =======  ========
Pro forma net loss per
 share basic and
 diluted(1).............                                              $  (0.57)          $  (0.57)
                                                                      ========           ========
Weighted average shares
 outstanding (basic and
 diluted)...............       11,175       11,933   12,543   12,966    13,075   13,026    13,486
Shares used in
 calculation of pro
 forma net loss per
 share basic and
 diluted(1).............                                                18,753             21,846
</TABLE>

<TABLE>
<CAPTION>
                                    As of December 31,
                             -----------------------------------      As of
                             1994   1995   1996   1997    1998    June 30, 1999
<S>                          <C>   <C>    <C>    <C>     <C>      <C>
Balance Sheet Data:
Cash and cash equivalents..  $ 19  $  190 $3,910 $4,111  $10,217    $  1,916
Working capital (deficit)..  (426)    386  3,394  2,398    8,805        (324)
Total assets...............    93   1,428  4,873  4,763   10,811       3,096
Capital lease, net of
 current portion...........   --      --      88     38       11           6
Common stock subject to
 rescission................   --      --      31    252      971       2,499
Redeemable convertible
 preferred stock...........   --      --     --   6,126   23,469      24,645
Total stockholders' equity
 (deficit).................  (352)    646  4,070 (3,390) (15,196)    (26,792)
</TABLE>
- --------------------
(1) See Note 1 of Notes to Financial Statements for an explanation of the
    method used to determine the number of shares used in computing pro forma
    net loss per share.

                                       20
<PAGE>

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS

   This prospectus contains forward-looking statements that involve risks and
uncertainties. Our actual results could differ materially from those
anticipated in forward-looking statements for many reasons, including the risks
described in "Risk Factors" and elsewhere in this prospectus. You should read
the following discussion with the "Selected Financial Data" and our financial
statements and related notes included elsewhere in this prospectus.

Overview

   We provide an Internet postage service that enables users to purchase,
download and print Internet postage directly from their personal computers. We
pioneered the development of Internet postage, including being one of the first
companies to approach the U.S. Postal Service with the idea of printing postage
from a personal computer.

   We have incurred net losses in each quarterly and annual period since our
inception, and as of June 30, 1999, we had generated no revenues and our
accumulated deficit was $39.0 million. From November 1994 to March 1998, we
incurred operating costs primarily related to the development of our Internet
postage service in accordance with U.S. Postal Service guidelines and specified
criteria. In March 1998, after extensive development and interaction with the
U.S. Postal Service, we began the three-phase beta test certification process
required by the U.S. Postal Service to qualify Internet postage vendors for
commercial distribution of Internet postage under the U.S. Postal Service's
Information Based Indicia Program. On August 9, 1999, we received final
approval from the U.S. Postal Service for our Internet postage service and
since that date have been providing our service nationally in accordance with
approved quantities and distribution channels. As of September 24, 1999, we had
delivered our Internet postage software and hardware to approximately 14,000
persons to enable them to purchase our Internet postage.

   In addition to working with the U.S. Postal Service to obtain approval of
our Internet postage service, our primary activities since inception have
included:

  . developing our business model;

  . developing and testing our Internet postage service;

  . hiring management and other key personnel;

  . building our infrastructure; and

  . entering into marketing and distribution relationships.

   The revenue and income potential of our business and market is unproven, and
our limited operating history makes it difficult to evaluate our prospects. We
expect to continue to incur net losses for the foreseeable future and may never
achieve profitable operations. Subsequent to June 30, 1999, we have recognized
only nominal revenues from our desktop Internet postage service. We intend to
recognize revenue from an initial software license fee for our Internet postage
software and hardware, ongoing convenience fees for the purchase of postage on
the Internet, and the sale of ancillary postage supplies. Our costs of revenues
include the costs of manuals, packaging, the postage device, credit card and
electronic funds transfer fees, the address management system, support costs,
as well as fulfillment costs, and direct costs from the sale of postage
supplies.

   During the years ended December 31, 1996, 1997 and 1998 and the six months
ended June 30, 1999, in connection with the grant of stock options to
employees, we recorded deferred stock compensation totaling $19.8 million,
representing the difference between the deemed fair value of our common stock
on the date such options were granted and the exercise price. Such amount is
included as a reduction of stockholders' equity and is being amortized over the
vesting period of the individual options, generally four years, using the
graded vesting method. The graded vesting method provides for vesting of
portions of the overall award at different dates and results in higher vesting
in earlier years than straight-line vesting. We recorded amortization of
deferred stock compensation in the amount of $688,000, $414,000 and $858,000
for the years ended

                                       21
<PAGE>


December 31, 1996, 1997 and 1998 and $3.6 million for the six months ended June
30, 1999. At June 30, 1999, we had a total of $14.4 million remaining to be
amortized over the corresponding vesting periods of the stock options. We will
record additional deferred compensation totaling $9.7 million for options and
shares granted in July, August and September 1999. Such amounts related to
option grants will be amortized in accordance with the Company's accounting
policy over the remaining vesting period of the grants through mid-2003.
Approximately $1.8 million related to stock grants will be recorded as an
expense in the three months ended September 30, 1999. See Notes 4 and 10 of
Notes to Financial Statements.

   On September 10, 1999, the Company issued 726,745 shares of its common stock
and warrants to purchase an additional 83,855 shares of common stock at an
exercise price of $0.01 per share to investors for cash proceeds of $5.0
million. The fair value of the common stock and warrants was deemed by
management to be $7.8 million and $1.0 million, respectively.

   In connection with the issuance of common stock and warrants, the Company
and the investors signed non-binding letters of intent to negotiate for a
period of up to one year to enter into definitive joint venture, joint
marketing, cooperation, or technology development agreements. The Company will
record the $3.8 million excess of the fair value of the common stock and
warrants over the consideration received as a prepaid marketing cost, contra
equity account. The balance will be amortized to expense over the one year
period covered by the letter of intent. If it becomes probable that efforts to
reach definitive agreements will cease prior to the end of the one year
negotiation period, the unamortized balance will be fully expensed.

Results of Operations

 Six Months Ended June 30, 1999 Compared to Six Months Ended June 30, 1998

   Research and Development. Research and development expenses include expenses
for research, design and development of our Internet postage service, expenses
related to obtaining patents from the U.S. Patent Office, and server and
network operations. Research and development expenses increased 113% to $5.2
million for the six months ended June 30, 1999 from $2.5 million for the
six months ended June 30, 1998. Of the $2.7 million increase in research and
development expenses in 1999, $1.7 million of this amount reflected increases
in research and development employee headcount, and consulting and contractor
expenses. The balance of the increase reflected costs of project materials for
further development of our Internet postage service, server-based service,
operations network investments and costs of product shipped to customers during
the beta test portion of the U.S. Postal Service approval process. We expect
the dollar amount of research and development expenses to increase in future
periods to support further development of our Internet postage service and our
server-based service and expenses related to the development of other products
and services.

   Sales and Marketing. Sales and marketing expenses consist primarily of
salaries and related benefits for sales and marketing personnel, Web site
development, package design, advertising and promotional expenses, and trade
show expenses. Sales and marketing expenses increased 119% to $2.5 million for
the six months ended June 30, 1999 from $1.1 million for the six months ended
June 30, 1998. Of the $1.4 million increase in sales and marketing expenses in
1999, $900,000 of this amount reflected costs associated with continued
development of our marketing campaigns in anticipation of the launch of our
Internet postage service. In addition, this increase reflected costs of
$300,000 for promotional obligations and advertising placements under marketing
and distribution relationships that were not in place in the first six months
of 1998. The increase also reflected increases in our sales and marketing
personnel. We expect sales and marketing expenses to increase in dollar amount
as we promote and launch our Internet postage service and as we hire additional
personnel, continue to promote our brand and add new marketing and distribution
relationships.

   General and Administrative. General and administrative expenses consist
primarily of compensation for administrative and executive staff, fees for
professional services, depreciation expense and general office expenses.
General and administrative expenses increased 52% to $1.4 million for the six
months ended June 30, 1999 from $903,000 for the six months ended June 30,
1998. $300,000 of the increase in general and administrative expenses in 1999
reflected increases in administrative staff and professional fees. We also

                                       22
<PAGE>

incurred a one-time charge of $175,000 for a severance accrual for a former
executive officer. We expect general and administrative expenses to increase in
dollar amount due to further additions in staffing and as we incur additional
costs necessary to prepare and manage the infrastructure for business
expansion, for legal services in connection with the Pitney Bowes litigation,
and associated costs with being a public reporting company.

   Amortization of Deferred Compensation. Amortization of deferred stock
compensation was $3.5 million for the six months ended June 30, 1999. There was
no amortization of deferred stock compensation for the six months ended June
30, 1998. We recorded aggregate deferred stock compensation of $18.7 million in
the period from July 1, 1998 through June 30, 1999 for options awarded to
employees with exercise prices below the deemed fair value for financial
reporting purposes of our common stock on their respective grant dates.

   Interest Income, Net. Interest income, net, consists primarily of earnings
on our cash and cash equivalents, net of interest expenses attributable to
equipment leases and any taxes. Interest income, net, increased 309% to
$176,000 for the six months ended June 30, 1999 from $43,000 for the six months
ended June 30, 1998. The increase in interest income, net, was due to
increasing average cash and cash equivalent balances as we received funds from
our financing activities. We expect interest income, net, to increase following
this offering as a result of increased cash balances resulting from this
offering.

 Year Ended December 31, 1998 Compared to Years Ended December 31, 1997 and
 1996

   Research and Development. Research and development expenses increased 43% to
$5.6 million in 1998 from $3.9 million in 1997 and increased 64% in 1997 from
$2.4 million in 1996. A majority of the increases in research and development
expenses in 1998 and 1997 were due to increases in contractor expenses and
personnel headcount costs of $900,000 in 1998 and $1.1 million in 1997. We also
incurred increases of $800,000  in 1998 and $400,000 for costs of project
materials and network operations investments.

   Sales and Marketing. Sales and marketing expenses increased 56% to $2.7
million in 1998 from $1.7 million in 1997 and decreased 1% in 1997 from $1.8
million in 1996. $500,000 of the increase in sales and marketing expenses in
1998 was due to costs related to the continued development of our marketing and
branding campaigns, and expenses related to the anticipated launch of our
Internet postage service. In addition, this increase reflected increases in our
marketing personnel costs of $400,000 and, to a lesser extent, costs incurred
for promotional obligations under our first marketing and distribution
relationships entered in 1998. Sales and marketing expenses in 1997 decreased
modestly due primarily to a reduction in trade show activity.

   General and Administrative. General and administrative expenses increased 9%
to $1.9 million in 1998 from $1.7 million in 1997 and increased 1% in 1997 from
$1.7 million in 1996. The increase in general and administrative expenses in
1998 was due primarily to increases in general and administrative staffing and
to a much lesser extent professional service costs and general office expenses.
General and administrative expenses in 1997 increased modestly due to a small
increase in administrative staff.

   Amortization of Deferred Stock Compensation. Amortization of deferred stock
compensation increased 107% to $858,000 in 1998 from $414,000 in 1997 and
decreased 40% in 1997 from $688,000 in 1996. In 1996, we recorded deferred
stock compensation of approximately $1.1 million related to equity awards to
employees. We also recorded aggregate deferred stock compensation of
approximately $3.6 million in 1998 for options awarded to employees with
exercise prices below the deemed fair value for financial reporting purposes of
our common stock on their respective grant dates.

   Interest Income, Net. Interest income, net, increased 159% to $370,000 in
1998 from $143,000 in 1997 and decreased 39% in 1997 from $236,000 in 1996. The
increase in interest income, net, in 1998 was due to increasing average cash
and cash equivalent balances as we received funds from our financing activities
in 1998. The decrease in interest income, net, in 1997 was due to declining
average cash and cash equivalent balances as we spent funds that had been
received.

                                       23
<PAGE>

Liquidity and Capital Resources

   Since inception, we have financed our operations primarily through private
sales of equity securities. We have received approximately $73.9 million in
private funding, including $35.2 million through our most recent financings in
August and September 1999. In addition, we have a $1.25 million line of credit
with a bank, all of which is available for use by us except for a $143,000
letter of credit to secure our lease and capital lease obligations totaling
$26,000 as of June 30, 1999. This line of credit bears interest at a rate of
prime plus 0.25%.

   Net cash used in operating activities totaled $7.9 million for the six
months ended June 30, 1999, $9.6 million for the year ended December 31, 1998,
$5.7 million for the year ended December 31, 1997, and $4.9 million for the
year ended December 31, 1996. Cash used in operating activities for each period
resulted primarily from net operating losses in those periods.

   Net cash provided by (used in) investing activities totaled $(387,000) for
the six months ended June 30, 1999, $(324,000) for the year ended December 31,
1998, $(21,000) for the year ended December 31, 1997, and $202,000 for the year
ended December 31, 1996. Cash provided by (used in) investing activities for
each period resulted primarily from the acquisition of capital assets,
primarily computer and office equipment.

   Net cash provided by financing activities totaled $12,000 for the six months
ended June 30, 1999, $16.0 million for the year ended December 31, 1998, $5.9
million for the year ended December 31, 1997, and $8.4 million for the year
ended December 31, 1996. Cash provided by financing activities for each period
resulted primarily from issuances of common stock and redeemable convertible
preferred stock, offset by the repayment of lease obligations and notes payable
to related parties.

   We believe that the net proceeds from this offering, together with our
current cash balances and cash flows from operations, if any, will be
sufficient to meet our present growth strategies and related working capital
and capital expenditure requirements for at least the next 12 months. Without
the proceeds of this offering, our cash resources would be sufficient to fund
our operations under our current plan through the second quarter of 2000. Our
current plan contemplates significant increases in spending when compared to
our historical expenditures. Without the proceeds from this offering, we would
be required to reduce our planned expenditures under our current operating plan
to enable our current cash resources to fund our operations for the next 12
months. We currently anticipate the need to raise additional capital prior to
achieving positive cash flows from our operations through the issuance of
additional debt or equity securities. We currently intend to use a portion of
the proceeds from this offering to satisfy our payment obligations under our
rescission offer, if any are required. We do not expect our payment obligations
under our rescission offer to have a material effect on the period of time
through which our financial resources will be adequate to support operations.
Our forecast of the period of time through which our financial resources will
be adequate to support operations is a forward-looking statement that involves
risks and uncertainties. Our actual funding requirements may differ materially
from this as a result of a number of factors including our plans to fully
support the commercial release of our desktop Internet postage service, our
introduction of new services and our investments in systems infrastructure and
staffing. We may require substantial working capital to fund our business and
we may need to raise additional capital prior to this time or thereafter. We
cannot be certain that additional funds will be available on satisfactory terms
when needed, if at all. If we are unable to raise additional necessary capital
in the future, we may be required to curtail our operations significantly.
Raising additional equity capital would have a dilutive effect on existing
stockholders.

   We believe that our exposure to market risk related to changes in interest
rates, equity prices and foreign currency exchange rates is not material. At
June 30, 1999, we did not hold any short or long-term investments.

Year 2000 Compliance

   Background. Many currently installed computer systems, software products and
other control devices are unable to accept four digit entries to distinguish
21st century dates from 20th century dates. As a result, many companies'
computer systems, software products and control devices may need to be upgraded
or replaced in order to operate properly in the year 2000 and beyond.

                                       24
<PAGE>

   Assessment and Implementation. The U.S. Postal Service requires participants
in the Information Based Indicia Program to maintain Year 2000 compliant
systems and software. As a result, we are in the process of developing a
comprehensive plan to make our internal computer software and hardware systems
Year 2000 compliant. Our Year 2000 compliance plan is comprised of 3 phases: an
assessment phase; an implementation phase; and a testing phase. This plan,
initiated in the first quarter of fiscal 1999, will be implemented by the end
of the fourth quarter of fiscal 1999. While we believe that this plan for
addressing the Year 2000 problem will be completed in a timely manner, we
cannot be certain that these Year 2000 compliance efforts will be successful.
The financial impact of making the required systems changes cannot be known
precisely at this time, but we currently expect these expenses to be less than
approximately $500,000. The financial impact, could, however, exceed this
estimate. Nonetheless, these costs are not expected to be material to our
business, financial condition, or results of operation. To date, we have
incurred expenses of less than approximately $100,000.

   Since inception, we have internally developed substantially all of the
systems for the operation of our Internet postage service. These systems
include the software used to provide customer interaction and transactional and
distribution functions to our services, as well as monitoring and back-up
capabilities. Based upon our assessment to date, we believe that our systems
will be Year 2000 compliant and have submitted Year 2000 readiness statements
to the U.S. Postal Service to indicate our Year 2000 compliance. However, we
cannot be sure how our Internet postage service will integrate with other
vendor-provided software.

   We use and depend on third-party equipment and software that may not be Year
2000 compliant. Consequently, our ability to address Year 2000 issues is, to a
large extent, dependent upon the Year 2000 readiness of these third parties'
hardware and software products. We are currently assessing the Year 2000
readiness of other third-party supplied software, computer technology and other
services and expect to complete this assessment by the beginning of the fourth
quarter of 1999. We have initiated communications or obtained information from
our vendors and suppliers of third-party equipment and software to validate
that their products and systems are Year 2000 compliant. All of our significant
vendors and suppliers of third party equipment and software have provided us
with written compliance statements or published information regarding their
Year 2000 readiness except for one vendor who has only responded orally.
Approximately 90% of our significant vendors and third party suppliers have
indicated that they are currently Year 2000 compliant, and the remaining 10%
have indicated that they are in the process of remediating Year 2000 issues and
expect to be Year 2000 compliant before year end. We will develop and
implement, if necessary, a remediation plan with respect to third-party
software, third-party vendors and computer technology and services that may
fail to be Year 2000 compliant.

   If Year 2000 issues prevent our users from accessing the Internet or our
Internet postage service or from processing postage, we will lose revenue. Any
failure of our third-party equipment or software to operate properly could
require us to incur unanticipated expenses. For example, pursuant to
regulations of the Information Based Indicia Program, we rely on the
U.S. Postal Service's secure postage accounting vault to purchase postage
credit for our customers. If the U.S. Postal Service systems are not Year 2000
compliant, our users may not be able to purchase additional postage which would
cause us to lose revenue and could injure our reputation.

   The Year 2000 readiness of the Internet infrastructure necessary to support
our operations is difficult to assess. For instance, we depend upon the
integrity and stability of the Internet to provide our services. We also depend
on the Year 2000 compliance of the computer systems and financial services used
by our customers. Thus, the infrastructure necessary to support our operations
consists of a network of computers and telecommunications systems located
throughout the world and operated by numerous unrelated entities and
individuals, none of which has the ability to control or manage the potential
Year 2000 issues that may impact the entire infrastructure. Our ability to
assess the reliability of this infrastructure is limited and relies solely on
generally available news reports, surveys and comparable industry data. Based
on these sources, we believe most individuals that rely significantly on the
Internet are carefully reviewing and attempting to remediate issues relating to
Year 2000 compliance, but it is not possible to predict whether these efforts
will be successful in reducing or eliminating the potential negative impact of
Year 2000 issues. A significant disruption in the ability of customers to
reliably access the Internet would have an adverse effect on demand for our
services and would harm our results of operations.

                                       25
<PAGE>

   Most Likely Worst Case Scenarios of Year 2000 Problems. We cannot accurately
predict how many failures related to the Year 2000 problem will occur or the
severity, duration or financial consequences of these failures. Any Year 2000
problems that affect us could result in an interruption in our service or the
inability of users to access our service. As a result, the following worst case
scenarios could occur:

  . any interruption in our service would result in loss of revenue and could
    require significant expenditures and efforts by us to restore service;
    and

  . widespread Year 2000 problems could result in a significant number of our
    users being unable to access our service due to problems with their
    personal computers or the Internet.

   Contingency Planning. We are currently developing contingency plans to be
implemented as part of our efforts to identify and correct Year 2000 problems
affecting our internal systems. We expect to complete these contingency plans
by the end of the third quarter of 1999. Depending on the systems affected,
these plans could include:

  .   accelerated replacement of effected equipment or software;

  .   increase work hours for our personnel or use of contract personnel to
      correct on an accelerated schedule any Year 2000 problems which may
      arise;

  .   the provision of manual workarounds for information systems; and

  .   other similar approaches.

If we are required to implement any of these contingency plans, such plans may
have a material adverse effect on our business, financial condition or results
of operations. Additionally, we may not complete these contingency plans in a
timely manner, and failure to do so could have a material adverse effect on our
business, financial condition or results and operations.

   The discussion of our efforts and expectations relating to Year 2000
compliance are forward-looking statements that are subject to risks and
uncertainties and actual results may differ materially from those indicated in
these forward-looking statements. Our ability to achieve Year 2000 compliance
and the level of anticipated expenses related to Year 2000 compliance could be
adversely affected by, among other things, the availability and cost of testing
and programming resources, the ability of third parties to resolve Year 2000
issues associated with their systems and software and unanticipated problems
that may in the future be identified in our ongoing compliance review.

Recent Accounting Pronouncements

   Effective January 1, 1998, the Company adopted Statement of Financial
Accounting Standards No. 130, "Reporting for Comprehensive Income." Statement
of Financial Accounting Standards No. 130 requires disclosures of components of
non-stockholder changes in equity in interim periods and additional disclosures
of components of non-stockholder changes in equity on an annual basis. Adoption
of Statement of Financial Accounting Standards No. 130 had no impact on the
Company's results of operations or financial position.

   In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting No. 131, "Disclosures about Segments of an Enterprise and
Related Information." The Company adopted Statement of Financial Accounting No.
131 effective January 1, 1998. The adoption of this standard did not have a
material effect on the Company's financial statement disclosures as the Company
operates in a single segment.

   In June 1998, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 133, "Accounting for Derivative Instruments
and Hedging Activities." The Company is required to adopt Statement of
Financial Accounting Standards No. 133 for the year ending December 31, 2000.
Statement of Financial Accounting Standards No. 133 establishes methods of
accounting for derivative financial instruments and hedging activities related
to those instruments as well as other hedging activities.

                                       26
<PAGE>

Because the Company currently holds no derivative financial instruments and
does not currently engage in hedging activities, adoption of Statement of
Financial Accounting Standards No. 133 is expected to have no material impact
on the Company's financial condition or results of operations.

   In March 1998, the American Institute of Certified Public Accountants issued
Statement of Position 98-1, "Accounting for the Cost of Computer Software
Developed or Obtained for Internal Use." Statement of Position 98-1 is
effective for financial statements for years beginning after December 15, 1998.
Statement of Position 98-1 provides guidance over accounting for computer
software developed or obtained for internal use including the requirement to
capitalize specified costs and amortization of such costs. We adopted the
provisions of Statement of Position 98-1 on January 1, 1999. The adoption of
Statement of Position 98-1 has not had a material impact on our financial
position or results of operations.

Quantitative and Qualitative Disclosures About Market Risk

   Our interest income and expense are sensitive to changes in the general
level of interest rates. In this regard, changes in interest rates affect the
interest on our cash equivalents earned as well as the interest incurred on our
indebtedness. Based on our cash equivalents balance and level of indebtedness
at June 30, 1999, our exposure to interest rate risk is not material.

                                       27
<PAGE>

                                    BUSINESS

 Overview

   We provide an Internet postage service that enables users to purchase,
download and print postage directly from their personal computers. The postage
can be printed directly onto envelopes, labels or documents using standard
laser or inkjet printers, 24 hours a day, seven days a week, without the need
to remain connected to the Internet. Customers can buy the software and
hardware components needed to use our Internet postage service through our
online store at www.e-stamp.com, over the telephone or at office supply stores.
We also plan to sell our services through computer superstores and catalogs.
Our Internet postage service is based upon our E-Stamp software, our secure
postage hardware device that enables the storage on the user's desktop of up to
a maximum of $500 of postage as currently allowed under U.S. Postal Service
regulations, and a U.S. Postal Service address verification CD-ROM. Our
Internet postage software and hardware currently sells for a suggested retail
price of $49.99. As part of our marketing strategy, we have previously, and may
from time to time, offer our software and hardware free of charge through
promotional arrangements with third parties. We charge a 10% convenience fee
when Internet postage is purchased, with a minimum fee of $4.99 and a maximum
fee of $24.99 per purchase. We also plan to offer for sale later this year
postage related consumables and peripherals including an Internet postage
scale, labels, windows envelopes and a label printer manufactured by third
parties with whom we have established relationships.

   We received approval from the U.S. Postal Service on August 9, 1999 for our
Internet postage service, and since that date have been providing our service
nationally. Our commercial roll-out is currently limited to 100,000 customers.
The U.S. Postal Service will evaluate our service when we obtain approximately
100,000 customers. Although the U.S. Postal Service has not informed us whether
it will continue to impose limitations on the number of our customers following
this evaluation, we will continue to be subject to U.S. Postal Service
regulations. As a result, the U.S. Postal Service could continue to require
periodic reviews before authorizing greater numbers of customers. We are
targeting our Internet postage service at small business, small office and home
office users. To help build our brand awareness and accelerate the adoption of
our Internet postage service, we have formed marketing and distribution
relationships with industry leaders. We currently have marketing relationships
with Microsoft, Yahoo!, Excite@Home, America Online, Intuit, Compaq, Earthlink,
Francotyp-Postalia and Avery Dennison. We expect our marketing and distribution
relationships to generate revenue through:

  .  increased sales of our Internet postage product as a result of increased
     traffic on our website;

  .  acquisition of customers through bundling arrangements and promotional
     offers to promote the use and adoption of our service; and

  .  markups on our sales of postage related consumables and peripherals
     manufactured by third parties.

   We believe our Internet postage service will enhance customer satisfaction
during the mail and postage process by improving overall access, convenience
and flexibility for small business, small office and home office users, and
will increase operating efficiencies and decrease postal fraud for the U.S.
Postal Service by including a unique digital signature on each digital stamp.

Industry Background

 The Internet and Electronic Commerce

   The Internet has emerged as a global medium for communications, information
and commerce. With over 125 million users at the end of 1998, which is expected
to grow to approximately 500 million users by 2003, as estimated by
International Data Corporation, the Internet is dramatically changing how
businesses and other users communicate and share information. The Internet has
also created new opportunities to conduct commerce, including business-to-
business electronic commerce, which enables organizations to streamline
business processes, lower operating costs and improve productivity. According
to Forrester Research, business-to-business electronic commerce is expected to
grow from an estimated $43 billion in 1998 to approximately

                                       28
<PAGE>

$1.3 trillion in 2003, accounting for more than 90% of the dollar value of
electronic commerce in the United States. Due to the Internet's convenience and
accessability, businesses are increasingly using the Internet for a wide
variety of operations, such as buying office supplies online, and may benefit
from emerging trends, such as buying postage over the Internet.

 The Postage Industry

   According to the U.S. Postal Service's latest annual report, the total
postage market in the U.S. was approximately $60 billion in 1998. Further, the
U.S. Postal Service processed over 197 billion pieces of mail, or an estimated
41% of the total worldwide mail shipments. Of the $60 billion U.S. postage
market, approximately $38 billion was represented by postage stamps and postage
meters, which are primarily used for first class, priority and express mail,
with the remaining $22 billion consisting of permit and other mail services.
Keenan Vision, an independent research firm, estimates that first class,
priority and express mail usage will grow to approximately $46 billion by the
year 2002. In addition, the worldwide private market for mail and parcel
delivery which does not require postage from governmental entities includes
services such as Federal Express and United Parcel Service.

   The U.S. Postal Service's longstanding mission is to meet the needs of its
customers with convenient options and improved postage security. To enhance
customer satisfaction, we believe the U.S. Postal Service searches for
innovations that:

  .  provide postal services that are convenient, cost-effective and easy-to-
     use;

  .  leverage existing customer infrastructures, such as personal computers,
     printers and software, to provide better and more efficient products and
     services;

  .  integrate mailing information on the computer desktop, including postage
     accounting;

  .  improve access to the large and growing small business, small office and
     home office markets;

  .  reduce the occurrence of postal fraud, which costs in excess of $150
     million per year in lost revenues according to the U.S. General
     Accounting Office; and

  .  increase efficiencies in the handling and processing of mail, thereby
     expediting the mailing process and enabling the U.S. Postal Service to
     lower its operating costs.

 The Emergence of Internet Postage

   To address these objectives, the U.S. Postal Service announced in 1995 a
program for its first new postage method since the approval of the postage
meter in 1920. The Information Based Indicia Program is a certification program
that authorizes third party vendors to sell digital postage that users purchase
over the Internet and print from a personal computer using ordinary laser or
inkjet printers. Internet postage consists of a two dimensional bar code
containing an encrypted digital signature that makes each digital stamp unique
and is intended to lower the prevalence of postal fraud. Through its
Information Based Indicia Program, the U.S. Postal Service is seeking to
enhance user convenience with a new access channel for postage that enables
users to print postage from a personal computer, 24 hours a day, seven days a
week.

                                       29
<PAGE>

   The following illustration is an example of our Internet postage that
conforms to the Information Based Indicia Program requirements, along with an
explanation of what each part represents.

[Illustration of digital stamp including the several elements described in the
                           bullet references below]

<TABLE>
   <S>                                      <C>
   .  FIM Mark. Facing identification mark  .  Two Dimensional Barcode. Encodes the
      that is used to properly orient the      readable information, including
      document in the U.S. Postal Service's    address of mailer and addressee, as
      automated sorting system.                well as other information including a
                                               unique digital signature and a
                                               delivery print code.

   .  Town Circle or Postmark. Identifies   .  Device ID. Unique identification code
      the town and zip code in which the       that links the postage back to the
      postal customer resides and from         device that stored the postage before
      which the postal item must be sent.      printing.

   .  Postage Amount. Ascribes a value to   .  Rate Category. Describes the type of
      the postage that has been printed and    postal service being used, which can
      removed from the user's account.         be first-class, priority mail,
                                               express mail or parcel post.
</TABLE>

 The Growth of Small Businesses, Small Offices and Home Offices and Their
 Postage and Internet Usage

   The United States has a large and growing number of small businesses, small
offices and home offices. According to International Data Corporation, there
were 44.6 million small businesses, small offices and home offices in the U.S.
in 1998, which is expected to grow to 57.6 million by 2002. Of the 44.6
million small businesses, small offices and home offices in 1998,
International Data Corporation estimates that 37.3 million were home offices,
5.7 million were small businesses with less than ten employees and 1.6 million
were small businesses with more than ten employees. Further, International
Data Corporation estimates that small businesses, small offices and home
offices accounted for $3.7 billion of electronic commerce in 1998 and will
account for $69.7 billion of electronic commerce in 2002. In addition, small
businesses, small offices and home offices are typically identified with the
following characteristics:

  .  limited amount of time and resources, resulting in the desire for
     services that simplify business processes; and

  .  self sufficient and "do-it-yourself" entrepreneurs who are willing to
     adopt new technologies that save time and increase flexibility.

   Postage Usage. Small businesses, small offices and home offices generally
conduct an essential part of their communications with suppliers and customers
through the postal system, including letters and packages that require
expedited delivery. Despite the relative importance of postage usage, small
business, small office and home office use of postage meters is low, and it
appears that using a postage meter is not cost-effective for

                                      30
<PAGE>

their needs. Based on a 1999 survey from International Data Corporation, 80% of
small businesses/small offices with 10 employees or less did not use a postage
meter. When the total cost is computed, including lease fees for both the
postage meter and scale, which approximate $25 per month, postage meter
resetting fees and proprietary consumables such as ink cartridges, which
approximate another $25 per month, small businesses, small offices and home
offices pay a significant premium to traditional postage stamps. In addition,
leasing a postage meter typically has required a multi-year lease lock-in
period.

   Internet Usage. As the Internet helps simplify business processes, small
businesses, small offices and home offices have become more willing to rely on
its functionality to improve their businesses. Accordingly, there has been
increased adoption of the Internet by small businesses, small offices and home
offices, as the following statistics indicate:

  .  International Data Corporation estimates that 56% of U.S. home offices
     in 1998 had Internet access, and that this percentage will reach 72% by
     2002; and

  .  for U.S. small businesses, International Data Corporation estimates that
     approximately 50% had Internet access in 1998. This amount is expected
     to increase to 67% by 2002.

   Despite the increasing prevalence of Internet access, most small businesses,
small offices and home offices are constrained by limited bandwidth Internet
connections. International Data Corporation estimates that:

  .  approximately 80% of small businesses, small offices and home offices
     with Internet access use dial-up modems, usually at 28.8 or 33.6
     kilobytes per second, to connect to the Internet;

  .  only 2.2% of small businesses, small offices and home offices with
     Internet access use a broadband connection, which provides faster access
     but the availability of which is limited; and

  .  approximately 71% of small businesses, small offices and home offices in
     1998 shared their modem lines with another device such as a telephone or
     fax machine, which necessitates being connected to the Internet only
     when performing required business functions.

   Given the rapid adoption of the Internet and the high postage usage by small
businesses, small offices and home offices, a substantial opportunity exists to
provide an automated method for purchasing, downloading and printing postage.
We believe the attractiveness of Internet postage services for the small
business, small office and home office user will depend upon the service's
ability to:

  .  enhance accessibility to postage, at any time of day;

  .  eliminate the costly time spent travelling to and waiting at the post
     office;

  .  automate business processes through integration with existing business
     software programs;

  .  be easy to use and flexible to meet the small business, small office and
     home office user's preferences;

  .  enable the tracking and reporting of postage usage;

  .  provide cost savings and faster mail delivery versus traditional postage
     solutions; and

  .  leverage a user's existing investment in personal computers, printers
     and software.

The E-Stamp Service

   We provide an Internet postage service that enables our customers to
purchase and download postage over the Internet directly into a secure, silver-
dollar size postage device, and then to print the purchased postage from their
personal computers at any time without the need to remain connected to the
Internet. We have leveraged our customer-centric focus and over 20 issued
patents to create a service that offers convenience and flexibility to small
business, small office and home office users. To help build our brand awareness
and

                                       31
<PAGE>

accelerate the adoption of our Internet postage service, we have formed
marketing and distribution relationships with industry leaders. In addition,
our Internet postage service is tightly integrated with popular business
computer programs, such as Microsoft Word and Outlook.

   We believe our desktop Internet postage service provides the following
benefits to small business, small office and home office users and the U.S.
Postal Service:

 Benefits to Small Business, Small Office and Home Office Users

   Enhanced Flexibility. With our Internet postage service, small business,
small office and home office users receive the benefits of buying and
downloading postage online, with the flexibility of printing postage while
connected or disconnected from the Internet. Our service is tailored to most
small business, small office and home office users, who are unable to, or
desire not to, stay continuously connected to the Internet due to shared
connections and access via slow dial-up modems;

   Convenient Access. Our Internet postage service provides unlimited,
convenient access to postage from the computer desktop, 24 hours a day, seven
days a week. small business, small office and home office users can purchase,
download and print postage with their personal computer, thereby avoiding
common inconveniences such as running out of postage and waiting in long lines
at the post office;

   Tight Integration. Our Internet postage service is tightly integrated with
popular software applications, such as Microsoft Word and Outlook, to enable
small business, small office and home office users to conveniently print
postage while using their most commonly used software programs;

   Variety of Postage Options. Our Internet postage service enables small
business, small office and home office users to print professional looking
addresses and postage on envelopes, labels or directly on correspondence, with
the postage printed in any denomination. Further, our service enables small
business, small office and home office users to print a variety of postage
types, including first class, priority mail, express mail and parcel post; and

   Simple and Secure. The components needed to use our Internet postage service
can be installed in minutes and include instructions and an intuitive user
interface. Further, our service is designed to provide small business, small
office and home office users the highest level of security and data integrity
as their databases of addresses are stored locally, rather than uploaded to a
remote server. In addition, we enable the accurate tracking and reporting of
postage purchases and usage, thereby limiting employee misuse.

 Benefits to the U.S. Postal Service

   A New Low-Cost Distribution Channel. Our Internet postage service enables
the U.S. Postal Service to distribute postage to users through the Internet,
thereby enabling significant manufacturing and distribution cost savings;

   Automation and Operating Efficiencies. Our Internet postage service enables
the U.S. Postal Service to further automate the handling and processing of
mail, through address verification and correction and extended zip code
printing capabilities;

   Extended Level of Security. Our Internet postage service provides the
highest level of security and auditing capabilities, which may help the U.S.
Postal Service to reduce the over $150 million dollars annually of postal
fraud; and

   Increased Postal Competitiveness. Our Internet postage service offers
additional capabilities for sending and tracking packages, such as priority
express or parcel post, enabling the U.S. Postal Service to more effectively
compete against the private parcel shipping industry, such as Federal Express
and United Parcel Service.

                                       32
<PAGE>

Growth Strategy

   Our objective is to be the leading provider of Internet postage services.
Key elements of our growth strategy include the following:

 Enter into Marketing and Distribution Relationships with Industry Leaders to
 Quickly Acquire Customers

   Our strategy includes entering into marketing and distribution
relationships with industry leaders to rapidly acquire customers, build brand
recognition and accelerate the adoption of our Internet postage service. We
have entered into marketing or distribution relationships with Microsoft,
Yahoo!, Excite@Home, America Online, Compaq, EarthLink, Intuit, Francotyp-
Postalia, Dymo-CoStar, Tension Envelope, Avery Dennison and Sunbeam's Pelouze
division. We have also entered into distribution agreements with Ingram Micro,
Digital River and LinkShare. Entering into these relationships with well-known
and trusted names in the Internet, computer hardware and software, and
business supply industries enable us to leverage these third parties'
installed customer bases, distribution channels and marketing expertise, and
facilitate the adoption, usage and accessibility of our Internet postage
service. We expect to enter into additional marketing and distribution
relationships as our business grows and we expand our portfolio of products
and services.

 Initially Focus on the Large and Growing Small Business, Small Office and
 Home Office Market

   We are initially focusing on the small business, small office and home
office market due to its attractive characteristics, which include:

  . a large and growing number of small business, small office and home
    office users;

  . high personal computer penetration;

  . predominant Internet usage via dial up modems over shared data lines; and

  . heavy reliance on postage, yet underserved by traditional services.

   We have conducted extensive qualitative and quantitative research on small
business, small office and home office users, and have tailored our Internet
postage service to meet their needs.

 Build and Promote Our Brand

   We intend to aggressively build our customer base by increasing awareness
of the E-Stamp brand. We believe that associating our brand with businesses
with whom we have marketing and distribution relationships and high quality
services is important to the expansion of our customer base. As we grow in
size, we intend to invest in building brand awareness through a variety of
marketing and promotional techniques, both independently and in conjunction
with third parties. We intend to promote our brand through television, print
and radio advertising, and online banner advertising through marketing
relationships with high traffic Web sites. We also plan to generate brand
recognition through viral marketing, which involves the prominent display of
our logo and Web site address on our Internet postage.

 Leverage Our Technology Platform and Expertise to Develop A Family of
 Internet Postage Services

   We intend to leverage our customer-centric focus, scalable electronic
commerce platform and our patent portfolio to develop a family of Internet
postage services for the high volume mailer and corporate enterprise and for
the low volume individual consumer. We intend to offer an intranet-based
service to the corporate market, through the integration of our technology
into enterprise applications and high speed mail processes, thus enabling
corporate users to print conveniently and efficiently large amounts of
Internet postage for bulk mailings and other corporate purposes. We also
intend to target the consumer market with a server-based service, that will
enable a user to purchase and store Internet postage directly on our secure
electronic commerce server and print from their local printer. We plan to
continue to develop other services that enable users to take advantage of
their existing

                                      33
<PAGE>

investments in computing infrastructure and the Internet, and will continue to
invest in and focus our technology development efforts on increasing online
transaction efficiency, reliability and security.

 Pursue Multiple and Recurring Revenue Streams

   We intend to leverage our brand, electronic commerce capabilities and
infrastructure to develop incremental revenue opportunities from a broader
customer base, including the corporate enterprise and the individual consumer.
These opportunities include the following:

   Sale of Postage Related Consumables and Peripherals. Through our Web site,
we intend to offer mailing-related consumables, such as labels and envelopes,
and peripherals, such as mechanical scales, personal computer-enabled digital
scales and label printers. We have created a patented window envelope, and have
entered into marketing and distribution relationships with third party vendors
of integrated scales and other postage supplies.


   Authenticated Document Market. We intend to capitalize on our expertise in
secure payment processing and the printing of authenticated documents to offer
other products and services that can be purchased online and printed from the
desktop, such as tickets and gift certificates.

 Pursue International Internet Postage Opportunities

   We believe that there are significant opportunities in international markets
for our Internet postage service. In particular, we believe our Internet
postage service is suited for many international markets because users pay for
connecting to the Internet based on usage time and thus are seeking services
that can reduce expensive connection time. Unless and until foreign postage
authorities create a certification process and recognize information-based
indicia postage, our Internet postage service will not be able to address
international markets.

Our Internet Postage Service

   Our Internet postage service enables users to purchase postage over the
Internet, download the postage quickly and efficiently into a secure, silver-
dollar size postage device, and to print the postage at any time from the
desktop directly onto envelopes, labels or documents using standard laser or
inkjet printers. We target today's small business, small office and home office
users, most of whom usually connect to the Internet on modems at speeds of 28.8
or 33.6 kilobytes per second. Our service enables users to store postage on
their desktop, thereby allowing them to print postage at their convenience
rather than requiring a reconnection to the Internet each and every time they
want to print postage.

   We received U.S. Postal Service approval to begin to sell our Internet
postage service nationally in August 1999. The software and hardware components
needed to use our Internet postage service are currently available through our
Web site and through a toll-free telephone number.

 Installation

   The installation process can be completed in a
matter of minutes through the use of a CD-ROM.
The E-Stamp Internet postage package includes all
the components needed to use our Internet postage
service and to connect to www.e-stamp.com for the
purchase of more postage, receipt of software
updates, or to access postal information. In
addition to our software, our Internet postage
package also includes our silver-dollar size,
secure postage device that connects onto the back
of a personal computer as shown on the right. The
secure postage device stores the postage and
connects between the parallel port and any other
printer device attached there.

       [Illustration of installation of postage device between printer cable and
                                             parallel port of personal computer]

                                       34
<PAGE>

 Printing Postage

   The following three steps are involved in using our Internet postage
service.

   Step 1: Buy It. The user can purchase Internet postage without ever leaving
the home or office, 24 hours a day, seven days a week. The user connects to our
electronic commerce server using a standard Internet connection and then
chooses the amount of Internet postage, up to the $500 maximum storage value
allowed by the U.S. Postal Service, depending on their particular needs and
usage patterns. The Internet postage is then downloaded and stored onto the
Internet postage device.

   Step 2: Print It. After choosing the medium on which to print the Internet
postage, whether directly onto a letter or using an envelope or label, the user
selects the destination address. The addresses are either read directly from
the user's current address database or can be entered with our software. In
either case, the addresses are verified with the Address Matching System from
the U.S. Postal Service contained on CD-ROM at the user's desktop, and the
amount of postage related to the item being sent is calculated. The user then
selects the printer device and prints the Internet postage.

   Step 3: Mail It. The user then drops the professionally posted letters and
packages in the mail or schedules a priority mail pickup from the U.S. Postal
Service.

 Additional Features

   In addition to providing the means to purchase, download and print Internet
postage, we have created other features that enhance the usability of our
Internet postage service.

   Business Application Integration. We have tightly integrated our Internet
postage software with the following leading software applications:

  . Microsoft Word -- Upon installation, our Internet postage software
    integrates tightly with Microsoft Word, with our E-Stamp icon appearing
    in the Microsoft Word tool bar, so users can print postage without
    leaving the application; and

  . Microsoft Outlook -- Our software allows users to access addresses in
    Outlook without leaving the E-Stamp application.

   Address Software Functionality. Our Internet postage service enables users
to print Internet postage using their existing mailing databases, and is
compatible with eight types of contact managers and word processing, accounting
and e-mail software applications. Further, addresses are stored on the user's
personal computer with our Internet postage service, negating any need to
upload confidential information to a shared server.

   Variety of Printing and Mailing Options. Users can choose from 16 different
types of envelopes, labels, air bills and postcards, as well as simply printing
postage directly onto letters and using our patented windowed envelopes.
Customers can use our Internet postage for a number of U.S. Postal Service
mailing options, including first class, priority mail and express mail for
guaranteed overnight delivery.

   Tracking and Reporting. Our Internet postage software includes a function
that allows users to track postage usage, including recipient address, time and
amount.

   Integrated Scale. We have teamed with Sunbeam's Pelouze division to offer an
integrated scale that automatically weighs the letter or package being sent to
correctly calculate the postage required, thus reducing over-posting.

   Internet Postage Supplies. We also provide postage supplies, such as labels
and envelopes, which we have designed to be compatible with our Internet
postage service. The sale of these postage supplies requires U.S. Postal
Service approval and we have obtained the necessary approvals for our labels
and envelopes.

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<PAGE>

Marketing and Distribution Relationships

   We believe that market penetration, brand awareness and adoption of our
Internet postage service in the early stages is critical to our success. Thus,
we continually focus on enhancing the breadth and depth of market penetration
and offering our customers the most convenient access to our Internet postage
service. To achieve these goals, we have established a strategy of entering
into marketing and distribution arrangements with the industry leaders in
business segments related to the Internet, computer hardware and software,
postage and business supplies. These relationships allow us to leverage those
third parties' installed customer bases, distribution channels and marketing
expertise to facilitate the adoption, usage and accessibility of our Internet
postage service.

   Microsoft. In July 1999, we entered into an agreement with Microsoft for
promotion of our service on the Microsoft Office Update Web site. Our agreement
with Microsoft contains exclusive elements, although Microsoft is not
prohibited from entering into an agreement with other Internet postage
providers. Exclusive elements of our agreement with Microsoft during the term
of the agreement include permanent placement on the home page of the web site,
co-marketing and/or co-funding of marketing activities, Internet postage launch
support and inclusion in editorial content on the web site. The initial term of
our agreement with Microsoft is one year, although the agreement is terminable
on 60 days prior notice. We have also integrated our Internet postage software
with Microsoft Word and Microsoft Outlook. Microsoft is also one of our equity
investors.

   Yahoo!. In May 1999, we entered into an advertising and promotion agreement
with Yahoo!. Yahoo! is the leading Internet guide in terms of traffic,
household and business user reach, and is one of the most recognized brands
associated with the Internet. Under this agreement, Yahoo! users will have
direct access to the E-Stamp services from within the Yahoo! Postal Center.
Yahoo! has agreed to display E-Stamp banners when any of 20 key words are
entered into the Yahoo! search engine including the key words "postage" and
"stamps." During the term of the agreement, Yahoo! has agreed to not display
banners, sponsorships or other forms of advertising of Internet postage
competitors on the Yahoo! Postal Center or within Yahoo Small Business property
and to not display or co-brand content from competitors in the Yahoo! Postal
Center. The initial term of the Yahoo! agreement expires December 31, 2000.

   Excite@Home. In August 1999, we entered into a binding letter of intent with
Excite@Home to provide direct access to our service across Excite@Home's @Work
division. This nonexclusive relationship is designed to provide early broadband
adopters with access to our service through the @Work site. As part of this
relationship, our service offering will be integrated into @Work's portfolio of
products and services. During the term of the agreement, other Internet postage
companies are not to be included in sponsorship areas or in the @Work small
business post office area. This service is currently expected to be available
later in 1999. Excite@Home also is one of our equity investors.

   America Online. In November 1998, we agreed to become a tenant in America
Online's new Postage Services Center, which features direct links to our Web
site where America Online members can purchase our Internet postage service. As
part of the nonexclusive agreement, America Online has agreed to promote our
service until May 2000 with banner advertisements across several of America
Online's branded properties, including CompuServe, AOL.com and Digital City.

   Intuit. In September 1999, we entered into an agreement with Intuit Inc., a
leading provider of financial software. Under this agreement, users of Intuit's
QuickBooks software will have access to our service directly from within the
QuickBooks software program. In addition, Intuit has agreed to market and
promote our service through Intuit's existing small business channels,
including the QuickBooks.com newsletter and the QuickBooks.com website. During
the term of this agreement so long as we meet its performance criteria, Intuit
has agreed not to market, promote or distribute Internet postage products of
our competitors in connection with the marketing, promoting and selling of the
QuickBooks software products. The initial term of the Intuit agreement expires
December 31, 2001.

   Compaq. In June 1998, we entered into a nonexclusive agreement with Compaq
to help accelerate the adoption of Internet postage. Under this agreement,
Compaq will market our Internet postage service as part of

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<PAGE>

the online services available to owners of their Prosignia line of personal
computers, targeted at the small business market and sold through their broad
sales channels, and will offer our Internet postage service through Compaq's
Web site in exchange for which we have agreed to pay Compaq royalties. The
Compaq agreement has an initial term that expires in June 2001. Compaq also is
one of our equity investors.

   Francotyp-Postalia. In August 1999, we entered into a non-exclusive
marketing and distribution agreement with Francotyp-Postalia, Inc., the U.S.
division of Francotyp-Postalia AG & Co., an international market leader in
modern office equipment and services for mail processing. Under this agreement,
Francotyp-Postalia has agreed to offer our Internet postage service through its
Web site. Additionally, we intend to leverage Francotyp-Postalia's established
distribution channels and existing customer base to distribute our service.
Francotyp-Postalia also is one of our equity investors.

   Avery Dennison. In July 1999, we entered into a non-exclusive relationship
with Avery Dennison that includes sales, marketing and distribution agreements.
Under this agreement, our Internet postage service is to be the only online
postage service promoted in packages of Avery labels and other printable
supplies. Additionally, we have agreed to offer a free sample pack of Avery PC
Postage Labels to our new customers. We plan to sell these labels in our online
supplies store.

   Sunbeam Corp.'s Pelouze Scale Co. Division. In February 1999, we entered
into a marketing and sales agreement with Signature Brands, Inc., a subsidiary
of Sunbeam Corporation, the leading manufacturer and distributor of postal
scales. We intend to leverage Sunbeam's already established distribution
channels and promote our service with a special Pelouze Internet Postage Scale
for sale in retail, mail order and contract stationery channels. Additionally,
the scale, which is designed to work exclusively with our Internet postage
service, is currently expected to be available to our customers through our
online store later in 1999. During the term of the agreement, Sunbeam has
agreed not to bundle a scale with a competitor's Internet postage product in
the U.S. and we have agreed not to bundle our service with another
manufacturer's integrated scale.

   Tension Envelope Corporation. In March 1999, Tension Envelope agreed to
become our exclusive supplier for our patented window envelopes. These patented
window envelopes, which we plan to sell through our online supplies store,
feature a special "window" for Internet postage and will save our customers
time by eliminating several steps from the mail preparation process. This
envelope has been submitted for required approvals to the U.S. Postal Service.

   EarthLink. In June 1999, we entered into a non-exclusive agreement with
EarthLink, a leading Internet service provider. Under this agreement, we and
EarthLink have agreed to develop a co-branded postal center accessible to
EarthLink's more than 1.3 million users from their personal start pages and
elsewhere in the EarthLink network. Additionally, EarthLink has agreed to make
our Internet postage service available for purchase through EarthLink's mall
and to place banner advertisements for our Internet postage service in their
service. In addition, EarthLink has agreed to place an advertisement for our
service in each issue of its user magazine. The initial term of our agreement
with EarthLink expires in August 2000.

   Dymo-CoStar. In July 1999, we entered into a marketing and distribution
agreement with Dymo-CoStar, a leading manufacturer of specialty label printers,
related software and supplies. Our agreement with Dymo-CoStar provides for
bundling of a promotional demonstration of our software with many Dymo-CoStar
printers. Additionally, Dymo-CoStar has agreed to jointly promote our service
in retail channels, promote us to its existing customer base, and to integrate
support for our service directly into its printer software. Although Dymo-
CoStar is not prohibited from entering into an agreement with other Internet
postage providers, under the agreement, Dymo-CoStar has agreed not to bundle
promotional materials of our competitors with Dymo-CoStar printers. Bundling
and promotion of our service under this agreement is expected to begin later
this year. Dymo-CoStar's specialty label printer has been approved for sale by
the U.S. Postal Service and the related labels have been submitted for required
approvals to the U.S. Postal Service.

   Under our agreements with Yahoo!, Microsoft, Earthlink Excite@Home and
Intuit, we are required to make aggregate payments to those parties totalling
approximately $5.5 million during the second half of 1999,

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<PAGE>


$10.5 million during the year 2000, and $2.4 million during the year 2001. Our
agreement with Yahoo! requires that we make payments to Yahoo! totalling
approximately $1.4 million during the second half of 1999 and $2.0 million
during the year 2000. Our agreement with Microsoft requires that we make
payments to Microsoft totalling approximately $1.5 million during the second
half of 1999 and $1.5 million during the year 2000. Our agreement with
Earthlink requires that we make payments to Earthlink totalling approximately
$0.2 million during the second half of 1999, and $0.2 million during the year
2000. Our agreement with Excite@Home requires that we make payments to
Excite@Home totalling approximately $1.3 million during the second half of
1999, $2.4 million during the year 2000 and $2.4 million during the year 2001.
Our agreement with Intuit requires that we make payments to Intuit totalling
approximately $1.0 million during the second half of 1999 and $4.5 million
during the year 2000. We have also agreed to pay approximately $1.3 million to
America Online, $0.7 million of which we paid as of June 30, 1999 and $0.6 of
which we are required to pay to America Online during the second half of 1999.
We have also agreed to pay Compaq royalties. We could be required to make
additional payments under these agreements if advertising exceeds established
levels of page views or generates and exceeds established levels of new
customers.

   In addition to the sales and marketing agreements described above, in
September 1999, we signed a nonbinding letter of intent with Deutsche Post AG,
Europe's largest letter services and logistics company, and a nonbinding letter
of intent with an affiliate of Deutsche Telekom AG, Europe's largest
telecommunications company. In each of these letters of intent, we agreed to
negotiate proposed business relationships involving joint marketing,
distribution and technology development. Any party can terminate negotiations
under these letters of intent at any time, and there is no assurance that any
binding agreement or business relationship with Deutsche Post AG or Deutsche
Telekom AG or any affiliate will ever develop.

Acquisition of Customers

   The initial focus of our Internet postage service is on the large and
growing small business, small office and home office market. We have
established relationships with leading Internet, computer and business supply
companies to distribute our Internet postage service through channels most
frequented by small business, small office and home office users. In addition,
we are leveraging those third parties' established customer bases, marketing
efforts and distribution channels to build brand recognition, accelerate
adoption and increase product accessibility. Our plan is to also promote and
extend our brand by conducting ongoing public relations campaigns and
developing affiliation and affinity programs.

   Product Distribution. We intend to make our Internet postage product
available through all standard distribution channels in order to increase
product availability and accelerate the adoption of Internet postage.
Specifically, we will target the following:

  .  Retail -- We have identified top retail accounts to target for our
     Internet postage product since small business, small office and home
     office users typically purchase a substantial portion of their office
     supply needs from these sources. These targets, such as Best Buy,
     CompUSA, CDW and Staples, have been targeted based on the demographics
     of their customer base, their experience selling computer products to
     small business customers, and their experience selling office supplies
     and mailing-related products. We plan to access traditional retailers
     through Ingram Micro, one of the nation's largest computer and computer-
     related product distributors. We plan to access online retailers through
     our relationship with Digital River, an online distributor, and our
     relationship with LinkShare, a provider of affiliate marketing services.

  .  Direct Marketing and Mail Order -- We will also offer our products
     directly from our online store at www.e-stamp.com and through our toll-
     free telephone number, as well as through major Internet and mail order
     software resellers, both online and catalog-based.

   Promotional Bundling Arrangements. We have entered into distribution
agreements with industry leading PC hardware, printer, scale and consumables
companies to bundle promotions for our Internet postage service in selected
products, which enables us to leverage these third parties' installed customer
base, distribution channels and marketing experience.

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<PAGE>

   Affiliate and Affinity Programs. We intend to establish an extensive
affiliate program with sites who target small offices and home offices and we
will offer other revenue-sharing opportunities for affiliates who promote or
provide links to our products from their Web site. The first of our affiliate
program relationships is with LinkShare which has a network of Web sites that
access the online merchants marketed by LinkShare. In addition, we plan to
extend promotional offers to trade associations with substantial small
business, small office and home office membership.

   Online and Offline Advertising. We currently have marketing relationships in
place with some of the top Internet sites, and we intend to enter into
marketing relationships with additional high traffic sites in the future. We
will also target specific customer segments through the use of varied online
banner advertisements. Further, we intend to utilize various offline forms of
advertising, such as television, print, radio and other targeted publications
that focus on specific attractive markets for our service.

   Viral Marketing Programs. The U.S. Postal Service has granted us permission
to include our Web site address and our logo on each Internet postage that is
printed. We have developed our Internet postage digital stamp to prominently
display our logo and Web site address to further develop our brand recognition
and accelerate the acquisition of new customers through referrals.

U.S. Postal Service Information Based Indicia Program Certification Process

   The U.S. Postal Service recently approved our Internet postage service under
its Information Based Indicia Program. The Information Based Indicia Program is
a U.S. Postal Service initiative committed to creating new, convenient,
electronic access to postage for mailing customers. Through the Information
Based Indicia Program, the U.S. Postal Service delivers a higher level of
convenience and security to customers with established performance and
evaluation criteria for personal computer postage products.

   For vendors of Internet postage, approval under the Information Based
Indicia Program includes a standardized, ten-stage certification process prior
to commercial release. Information Based Indicia Program participants must
receive U.S. Postal Service authorization at each stage of the certification
process to proceed to the next stage. The second to last stage is a three phase
beta test, which includes customers sending mail through the mail system. The
final stage before commercial release is vendor product approval, which
represents formal approval to begin selling Internet postage nationally. The
significant steps in the certification process and the time commitment required
of a potential Information Based Indicia Program vendor creates a significant
barrier to entry for competitors in the U.S. Internet postage market.

   The Information Based Indicia Program certification process includes the
following stages:

<TABLE>
     <S>                              <C>
                                       6. U.S. Postal Service address matching
     1. Letter of intent                  system
     2. Non-disclosure agreement       7. Product submission/testing
     3. Operational concept            8. Product infrastructure tests
     4. Software documentation         9. Beta test approval (three phases)
     5. Provider infrastructure plan  10. Vendor product approval (national
                                          distribution)
</TABLE>

   Upon receipt of U.S. Postal Service certification, Information Based Indicia
Program vendors begin national distribution in accordance with approved
quantities and distribution channels. Each approved vendor's commercial roll-
out is initially limited to 10,000 customers, with expanding numbers of
customers based upon successful evaluations by the U.S. Postal Service. We
recently received authorization from the U.S. Postal Service to expand our
commercial roll-out to 100,000 customers.

Competition

   We received U.S. Postal Service approval to commercially release our
Internet postage service on August 9, 1999 and began providing our service on
that date. We believe that our Internet postage service is well positioned to
compete in the small business, small office and home office market, which
consists of small businesses, small offices and home offices, because of our
tight integration with software applications and our advantages in bandwidth-
constrained environments. We will also compete with providers of traditional
postage

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<PAGE>

products such as stamps sold by the U.S. Postal Service, and services such as
Federal Express and United Parcel Service. In addition to providers of
traditional postage products and services, we compete with three other
Information Based Indicia Program vendors, Neopost, Pitney Bowes and
Stamps.com, who have all initiated the certification process with the U.S.
Postal Service. Only one of these, Stamps.com, was approved for commercial
release by the U.S. Postal Service on August 9, 1999. However, Stamps.com
failed to make their service commercially available at that time. While the
market for Internet postage is new, we expect that competition will further
increase once Internet postage products become widely available and generally
accepted.

   While we believe our Internet postage service provides significant benefits
over traditional postage methods, especially for the small business, small
office and home office market, we expect to continue to also compete with
traditional postage methods such as stamps and metered mail. Postage meters are
typically paid for on a monthly lease, require significant investments in
additional supplies such as ink cartridges, charge a premium for postage and
are subject to tampering and theft. There can be no assurance that customers
will change their current postage purchasing habits and switch to Internet
postage products. The failure of a commercially viable number of users to
switch to Internet postage would significantly harm our business, financial
condition and results of operations.

   We may not be able to maintain a competitive position against current or
future competitors as they enter the Internet postage market in which we
compete. This is particularly true with respect to competitors with greater
financial, marketing, service, support, technical, intellectual property and
other resources than us. Our failure to maintain a competitive position within
our market could seriously harm our business, financial condition and results
of operations. We believe that the principal competitive factors in the
Internet postage market include:

  .  U.S. Postal Service product certification;

  .  brand recognition;

  .  integration with other software applications;

  .  convenience;

  .  service availability and reliability;

  .  price;

  .  security; and

  .  marketing and distribution relationships.

Technology

   We have leveraged our technologies, including our desktop software, postage
application programming interface, Internet postage device, patented window
envelope, and systems infrastructure, in order to create a comprehensive
service that meets our customers' needs and fulfills the U.S. Postal Service's
certification requirements.

   Desktop Software. Our desktop software enables users to print Internet
postage offline without maintaining a persistent Internet connection. The
software is designed to interface with our proprietary postage device to print
the recipient's address and Internet postage in one step onto envelopes,
labels, and documents. The recipient's address can be selected using the built-
in support for many popular applications, including Microsoft Word and Outlook,
without the user having to upload data over the Internet or separately type the
address. This is a significant advantage over other Internet postage products
which require the user to type in or import addresses from other software
packages and force them to keep multiple copies of the same address
synchronized across multiple address books. In addition, the software has a
built-in electronic software update feature which automatically updates postage
rates and the software itself ensuring that each customer always has the most
current version of our software. The software includes a postage application
programming interface which enables other software vendors to integrate their
software with our software.

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<PAGE>

   Postage Application Programming Interface. We built our software from the
ground up so that it can be integrated as a component of other software
applications. This means virtually any software application can be "postage-
enabled" to print Internet postage onto envelopes, labels, or documents.
Through this technology, our software can be tightly integrated with popular
business applications.

   Internet Postage Device. We have developed a proprietary silver-dollar size
Internet postage device that securely stores the postage value our customers
buy. The postage device connects to a personal computer's parallel port between
the personal computer and the printer. The postage device enables our users to
print postage without the need to remain connected to the Internet because
account balances are stored on the device, not on a remote server. The postage
device is also secure and tamper-resistant, disabling itself if anyone attempts
to open or tamper with it. Our Internet postage device has been tested by the
National Institute of Standards and Technology and certified as Federal
Information Processing Standard 140-1 compliant at security levels 3 and
partially 4. Overall security was reviewed by a Cryptographic Equipment
Assessment Laboratory and Internet Security was reviewed by ISS Group, a
leading Internet security company.

   Patented Window Envelope. We have developed and patented a special window
envelope that has an additional window in the upper right corner for postage.
This enables postage to be printed directly on documents, folded in thirds and
inserted into one of our envelopes. They are a significant time-saver because
they eliminate the need to separately prepare an envelope or label. Tension
Envelope will be manufacturing this envelope for us and we plan to offer it to
our customers on our Web site.

   Systems Infrastructure. Our systems have been designed to be scalable as our
business grows and to allow for rapid deployment of our Internet postage
service. As the quantity of purchases or number of users accessing our systems
increases, we have developed our systems to incrementally grow through the
necessary additions. Our systems are based on the Microsoft Windows NT,
Transaction Server and SQL Server environment. For our Web site, we utilize
Javascript and Active Server Pages.

Future Product Development

   We are currently developing a server-based service that is targeted at
broadband-enabled users. As estimated by Forrester Research, broadband access
was only utilized by 2% of online users in 1998, but will increase to 26% in
2002. Once broadband connections become more prevalent and customers have
dedicated Internet access, our server-based service will be positioned to meet
the needs of this base of users. The server-based service will enable a user to
purchase and store Internet postage directly on our secure electronic commerce
server and print from their local printer.

Plan of Operation

   Our plan of operation for the remainder of 1999 and the first six months of
2000 calls for significantly increasing our operating expenses and capital
expenditures when compared with our historical levels. We believe this
increased spending will be necessary to fully support the commercial release
and support of our Internet postage service, our development of our server-
based service and our investments in expanding our systems infrastructure and
staffing. We believe that the net proceeds from this offering, together with
our current cash balances and cash flows from operations, if any, will be
sufficient to meet our growth strategies and related working capital and
capital expenditure requirements under our current operating plan for at least
the next 12 months. We do not expect to have to raise additional funds to meet
expenditures required for operating our business under our current operating
plan during the next 12 months. Our forecast of the period of time through
which our financial resources will be adequate to support our operations under
our current plan of operation is a forward looking statement that is subject to
risks and uncertainties, and we may be required to raise additional capital
prior to that time and afterwards.

   During the remainder of 1999, we anticipate significantly increasing our
operating expenses and capital expenditures as compared to the first two
quarters of 1999. We expect the majority of our increased spending to relate to
increased sales and marketing expenses as we continue to expand our marketing
campaign for our Internet postage service. We also expect to spend a higher
amount on research and development expenses

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<PAGE>

primarily related to the development of our server-based service and additional
features for our Internet postage service. Our general and administrative
expenses are also expected to increase. A portion of our forecasted increase in
spending for sales and marketing, research and development and general and
administrative expenses is attributable to our plans to increase our total
employee headcount by 50% during the remainder of 1999.

   We expect our operating expenses and capital expenditures to continue to
increase during the first two quarters of 2000, with the majority of this
increase relating to continued growth in our sales and marketing expenses. In
addition, we expect our total employee headcount to increase approximately 33%
during the first half of 2000 as compared to our expected employee headcount at
the end of 1999 which would also contribute to this increased spending.

   In addition to the net proceeds of this offering and our current cash
resources, we expect that our cash resources for the remainder of 1999 and the
first six months of 2000 will also include any revenue generated from the sale
of our Internet postage service, although to date the amount of such revenue
has been nominal and our plan of operation for that period does not contemplate
such revenue constituting a material source of cash.

Company History

   Prior to September 1996, we conducted operations as Post N Mail, L.L.C., a
Texas limited liability company formed in April 1994. From April 1994 until the
September 1996 merger with E-Stamp, Post N Mail engaged in discussions with the
U.S. Postal Service regarding non-traditional postal services and, as use of
the Internet became more prevalent, focused upon the development of our
Internet postage service. In September 1996, Post N Mail was merged into E-
Stamp, a Delaware corporation. Following the merger, we continued to develop
our Internet postage service which entered the U.S. Postal Service's three-
phase beta test certification process in March 1998 and received final U.S.
Postal Service approval on August 9, 1999.

Employees

   As of June 30, 1999, we employed 75 full-time people, including 29 in
engineering, 13 in operations, eight in customer service and support, 13 in
sales, marketing and business development, and 12 in general and administrative
functions. Based on our growth plans, we anticipate hiring a significant number
of employees over the next 12 months. From time to time, we employ independent
contractors to support our research and development, marketing, sales and
support and administrative organizations. Our employees are not represented by
any collective bargaining unit, and we have never experienced a work stoppage.
We believe our relations with our employees are good.

Intellectual Property

   We regard our technology as proprietary and attempt to protect it by relying
on patent, trademark, service mark, copyright and trade secret laws and
restrictions on disclosure and transferring title and other methods. We have
been issued over 20 U.S. patents and have 12 patent applications pending. Our
issued patents expire between 2010 and 2016. We consider patents to be a
significant part of our intellectual property, and will remain so for the
foreseeable future. We also generally enter into confidentiality or license
agreements with our employees and consultants, and generally control access to
and distribution of our documentation and other proprietary information.
Despite these precautions, it may be possible for a third party to copy or
otherwise obtain and use our proprietary information without authorization or
to develop similar technology independently. We are in the process of pursuing
the registration in the U.S. for a number of our trademarks and service marks,
including "E-Stamp," and we cannot assure you that any of these trademark
registrations will be issued or that if they are issued that we will be able to
successfully enforce them. Effective trademark, service mark, copyright and
trade secret protection may not be available in every country in which our
services are distributed or made available over the Internet, and policing
unauthorized use of our proprietary information is difficult. Despite efforts
to protect our intellectual property rights, we face substantial uncertainty
regarding the impact that other parties' intellectual property positions will
have on the Internet postage market.

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<PAGE>

   In particular, Pitney Bowes has sent formal comments to the U.S. Postal
Service asserting that intellectual property of Pitney Bowes would be infringed
by products meeting the requirements of the Information Based Indicia Program's
specifications. Furthermore, in June 1999, Pitney Bowes filed a lawsuit in the
U.S. District Court against us alleging infringement of Pitney Bowes patents.
For a discussion of claims by Pitney Bowes and risks associated with
intellectual property, please refer to "Risk Factors--Intellectual property
infringement claims, including claims asserted by Pitney Bowes against us,
could prevent or hinder our ability to sell Internet postage" and "--Legal
Proceedings."

Facilities

   Our headquarters are currently located in a leased facility in San Mateo,
California, consisting of approximately 25,000 square feet of office space. The
office space is under a 15-month lease which will expire in June 2000. We will
need to obtain additional office space prior to the end of 1999 and are
currently in discussions with respect to additional space.

Legal Proceedings

   On June 10, 1999, Pitney Bowes filed suit against us in the U.S. District
Court for the District of Delaware alleging infringement of Pitney Bowes
patents. The suit alleges that we are infringing seven patents held by Pitney
Bowes related to postage application systems and seeks treble damages, a
preliminary and permanent injunction from further alleged infringement,
attorneys' fees and other unspecified damages. One week later, Pitney Bowes
filed a similar complaint against one of our competitors, Stamps.com, alleging
infringement of two of the seven Pitney Bowes patents alleged in the E-Stamp
complaint. On July 30, 1999, we filed our answer to Pitney Bowes' complaint in
which we deny all allegations of patent infringement and assert affirmative and
other defenses based on statutory and common law grounds, including inequitable
conduct on the part of Pitney Bowes in its procurement of patents in
proceedings before the U.S. Patent and Trademark Office. As part of the answer,
we also brought various counterclaims against Pitney Bowes claiming Pitney
Bowes' violation of Section 2 of the Sherman Act and intentional and tortious
interference with E-Stamp's business relations based, in part, upon our
allegations that Pitney Bowes has unlawfully maintained its monopoly power in
the postage metering market through a scheme to defraud the U.S. Patent and
Trademark Office and its efforts to discourage potential investors and
businesses from investing and entering into agreements with E-Stamp. Our suit
seeks compensatory and treble damages, injunctive relief and recovery of
attorney's fees. On September 21, 1999, Pitney Bowes filed a motion to strike
or dismiss certain of E-Stamp's affirmative defenses and counterclaims or, in
the alternative, to bifurcate discovery and trial of those counterclaims; E-
Stamp's response to the motion is due in October 1999. We are continuing to
investigate the claims against us as well as infringement by Pitney Bowes of
our patents, and may assert additional defenses or pursue additional
counterclaims or independent claims against Pitney Bowes in the future.

   Pendency of the litigation can be expected to result in significant expenses
to us and the diversion of management time and other resources. If Pitney Bowes
is successful in its claims against us, then we may be hindered or even
prevented from competing in the Internet postage market and our operations
would be severely harmed. For example, the Pitney Bowes suit could result in
limitations on how we implement our services, delays and costs associated with
redesigning our services and payments of license fees and other payments. An
injunction obtained by Pitney Bowes could eliminate our ability to market
critical products or services.

   On May 10, 1999, in U.S. District Court, E-Stamp obtained a temporary
restraining order against Dave Lahoti ordering Mr. Lahoti to refrain from using
his Web site, which he had registered as "estamps.com." On June 14, 1999, the
U.S. District Court granted a preliminary injunction requiring Mr. Lahoti to
refrain from using his Web site in connection with Internet postage and to
place a disclaimer identifying that his Web site is not associated with E-Stamp
Corporation. We are seeking damages and a permanent injunction in connection
with this matter. Mr. Lahoti has denied the material allegations and has set
forth his affirmative defenses.

                                       43
<PAGE>

                                   MANAGEMENT

Executive Officers and Directors

   The following table sets forth our executive officers' and directors' ages
and positions as of October 1, 1999.

<TABLE>
<CAPTION>
              Name            Age                  Position
   <C>                        <C> <S>
   Robert H. Ewald...........  51 President, Chief Executive Officer and
                                  Director

   Anthony H. Lewis, Jr.  ...  45 Vice President and Chief Financial Officer

   Nicole Eagan..............  34 Senior Vice President, Marketing and Sales

   Martin Pagel..............  37 Chief Technology Officer

   Roderick Witmond..........  35 Vice President, Strategic Development and
                                  Operations

   Thomas J. Reinemer........  39 Vice President, International

   Edward F. Malysz..........  39 Vice President, General Counsel and
                                  Secretary

   Marcelo A. Gumucio........  61 Chairman of the Board

   John V. Balen(1)(2).......  38 Director

   Thomas L. Rosch(2)........  37 Director

   Gregory S. Stanger(2).....  35 Director

   Adam Wagner(1)............  41 Director
   Rebecca Saeger............  44 Director
</TABLE>
- ---------------------
(1) Member of Audit Committee

(2) Member of Compensation Committee

   Robert H. Ewald has been our President and Chief Executive Officer since
February 1999 and has been a Director since January 1999. From July 1996 to
July 1998, Mr. Ewald held various executive positions at Silicon Graphics,
Inc., a manufacturer of computer workstations, servers and supercomputers, most
recently as Executive Vice President and Chief Operating Officer. From August
1984 to June 1996, Mr. Ewald held various management and executive positions
with Cray Research, Inc., a manufacturer of high performance computers,
including President and Chief Operating Officer. Before joining Cray Research,
Inc., Mr. Ewald led the Computing and Communications Division of the Los Alamos
National Laboratory and was responsible for providing computing and
communications services to government customers nationwide between 1980 and
1984. Mr. Ewald is currently a director of Ceridian, Inc., an information
technology services company, and a member of the President's Information
Technology Advisory Committee chartered by the White House. Mr. Ewald received
his B.S. in civil engineering from the University of Nevada and his M.S. in
civil engineering from the University of Colorado.

   Anthony H. Lewis, Jr. has been our Vice President and Chief Financial
Officer since July 1999. From October 1995 to July 1999, Mr. Lewis held various
management positions at Quantum Corporation, a manufacturer of computer storage
devices, most recently as Vice President of Finance, Treasurer. From 1986 to
October 1995, Mr. Lewis held various management positions at Tandem Computers,
Inc., a manufacturer of computers, including Vice President, Corporate
Financial Controller. Mr. Lewis received his A.B. in economics from Harvard
College and his M.B.A. from Harvard Business School.

   Nicole Eagan has been our Senior Vice President, Marketing and Sales since
July 1999 and previously served as our Vice President, Marketing and Business
Development from May 1996. From 1993 to May 1996, Ms. Eagan held various
positions with Oracle Corporation, a manufacturer of systems software and
business applications software, including Director, Strategic Marketing,
Director, Channel Marketing for Global Business Alliances Group and Director,
Server Product Marketing for Oracle 7. Ms. Eagan received her B.S. in marketing
from Montclair University in New Jersey.

                                       44
<PAGE>

   Martin Pagel has been our Chief Technology Officer since October 1998 and
previously served as our Vice President, Engineering and Chief Architect from
July 1996. From January 1988 to June 1996, Mr. Pagel held various management
and engineering positions at Microsoft Corporation, a manufacturer of software
products, including Technical Manager, Operations for its Internet and
electronic commerce strategies and Program Manager for the design of
distributed computing enhancements, also known as the Cairo Project. Mr. Pagel
was also involved in the formation of Microsoft Consulting Services in Europe.
Mr. Pagel received his degrees in business and computer science from the
Technical University in Braunschweig, Germany.

   Roderick Witmond has been our Vice President, Strategic Development and
Operations (Acting), since August 1999. From July 1995 to August 1999, Mr.
Witmond was a Principal Consultant with the Government Consulting Practice of
PricewaterhouseCoopers, an accounting and consulting firm, focusing primarily
on assignments with the U.S. Postal Service and, most recently, E-Stamp. Mr.
Witmond obtained his B.S. from London University in London, England in 1986 and
his M.B.A. from the Darden Graduate School of Business Administration,
University of Virginia in 1995.

   Thomas J. Reinemer has been our Vice President, International since March
1999 and previously served as our Vice President, Operations from August 1996.
From May 1995 to July 1996, Mr. Reinemer was Senior Director of Strategic
Marketing and Development at Oracle Corporation, a manufacturer of systems
software and business applications software, where he was responsible for
developing and implementing Oracle's partner strategies. From January 1994 to
May 1995, Mr. Reinemer was International Business Development Manager at
Microsoft, a manufacturer of software products, where he played a leading role
in the launch and expansion of Microsoft's International BackOffice business.
Mr. Reinemer also held various management positions at Novell Germany, a
provider of network software between 1989 and 1995. Mr. Reinemer received his
degrees in electronic processing and in industrial electronic processing
equipment from the Freidrich Ebert Technical College in Weisbaden, Germany.

   Edward F. Malysz has been our Vice President, General Counsel and Secretary
since June 1999. From July 1993 to June 1999, Mr. Malysz held various legal
positions with Silicon Graphics, Inc., a manufacturer of computer workstations,
servers and supercomputers, most recently serving as Senior Corporate Counsel.
From August 1988 to July 1993, Mr. Malysz was a transactional lawyer with the
law firm of Berliner Cohen. From August 1982 to December 1984, Mr. Malysz was a
certified public accountant with Arthur Young & Company, an accounting firm.
Mr. Malysz received his B.A. in economics from the University of California,
Santa Barbara and J.D. from Santa Clara University.

   Marcelo A. Gumucio has served as Chairman of the Board since November 1998.
Mr. Gumucio is Managing Partner of Gumucio, Burke and Associates, a private
investment firm which he co-founded in 1992. From April 1996 to July 1997, Mr.
Gumucio was Chief Executive Officer of Micro Focus PLC, an enterprise software
provider. He also served as a member of the Micro Focus' board of directors
from January 1996. Before joining Micro Focus, Mr. Gumucio was President and
Chief Executive Officer of Memorex Telex NV between 1992 and 1996. Mr. Gumucio
currently serves on the board of directors of BidCom, Inc., Digital Island and
Burr Brown Corporation. Mr. Gumucio received his B.S. in mathematics from the
University of San Francisco and M.S. in applied mathematics and operations
research from the University of Idaho. Mr. Gumucio is also a graduate of the
Harvard Business School Advanced Management Program.

   John V. Balen has served on the Board of Directors since July 1998. Mr.
Balen has been a principal of Canaan Partners, a national venture capital
investment firm, since September 1995. From June 1985 to June 1995, Mr. Balen
served as Managing Director of Horsley Bridge Partners, a private equity
investment management firm. Mr. Balen currently serves on the board of
directors of Intraware and Commerce One. Mr. Balen received his B.S. in
electrical engineering and M.B.A. from Cornell University.

   Thomas L. Rosch has served on the Board of Directors since September 1997.
Mr. Rosch joined AT&T Ventures in December 1996 where he is currently a
partner. AT&T Ventures is an independent venture capital fund that invests in
information technology companies. Previously, Mr. Rosch served as a senior
member of The Boston Consulting Group from November 1989 to November 1996. Mr.
Rosch currently serves

                                       45
<PAGE>

on the board of directors of Veridicom, Inc. and PaymentNet, Inc. Mr. Rosch
received his A.B. in government and philosophy from Harvard University and
J.D./M.B.A. from Stanford University.

   Gregory S. Stanger has served on the Board of Directors since September
1997. Mr. Stanger is a Senior Director, Corporate Development at Microsoft
Corporation and has held various positions in Corporate Development at
Microsoft since July 1993 and within the Microsoft Finance Organization since
joining Microsoft Corporation in September 1991. Previously, Mr. Stanger worked
in investment banking at PaineWebber from March 1987 to June 1989. Mr. Stanger
received his B.A. in economics from Williams College and M.B.A. from the
University of California, Berkeley.

   Adam Wagner has served on the Board of Directors since November 1996. Mr.
Wagner is the founder and principal of Neo Ventures, LLC, a privately-held
investment firm, since its formation in September 1999. From June 1992 until
September 1999, Mr. Wagner served as Vice President, Investments at Wagner &
Brown, Ltd., a closely-held oil and gas investment company. Mr. Wagner
currently serves on the board of directors of PFS Thermoplastics, Inc.,
SeaSound, LLC, nStream LLC and iSong.com, inc. Mr. Wagner received his B.S. in
geology from the University of Oklahoma and M.B.A. from the University of
Southern California.

   Rebecca Saeger has served on the Board of Directors since October 1999.
Since June 1997, Ms. Saeger has served as Executive Vice President of Brand
Marketing for VISA U.S.A., a provider of payment products and services. From
June 1991 to May 1997, Ms. Saeger served in various positions at Foote, Cone &
Belding San Francisco, an advertising agency, including Senior Vice President,
Group Management Supervisor and Director of Account Management. From June 1980
to April 1991, Ms. Saeger worked at Ogilvy and Mather New York, an advertising
agency, where she held a variety of positions, including most recently, Senior
Vice President, Group Director. Ms. Saeger received her B.A. from Muhlenberg
College and M.B.A. from the Wharton School of Business, University of
Pennsylvania.

   Each of our current directors was selected pursuant to a stockholders'
agreement among us, the holders of our Series A and B preferred stock and
several holders of our common stock. The stockholders' agreement will terminate
upon the closing of this offering.

Classified Board

   Our certificate of incorporation provides for a classified board of
directors consisting of three classes of directors, each serving staggered
three-year terms. As a result, a portion of our board of directors will be
elected each year. Robert H. Ewald and Thomas L. Rosch have been designated
Class I directors whose terms expire at the 2000 annual meeting of
stockholders. Marcelo A. Gumucio and Adam Wagner have been designated Class II
directors whose terms expire at the 2001 annual meeting of stockholders.
Gregory S. Stanger, John V. Balen and Rebecca Saeger have been designated as
Class III directors whose terms expire at the 2002 annual meeting of
stockholders. This classification of the board of directors may delay or
prevent a change in control of our company or in our management.

   Executive officers are appointed by the board of directors on an annual
basis and serve until their successors have been duly elected and qualified.
There are no family relationships among any of our directors, officers or key
employees.

Board Committees

   We established an audit committee and a compensation committee in July 1998.

   Our audit committee currently consists of Messrs. Balen and Wagner. The
audit committee reviews our internal accounting procedures and consults with
and reviews the services provided by our independent accountants.

   Our compensation committee currently consists of Messrs. Balen, Rosch and
Stanger. The compensation committee reviews and recommends to the board of
directors the compensation and benefits of our employees.

                                       46
<PAGE>

Compensation Committee Interlocks and Insider Participation

   Prior to establishing the compensation committee, the board of directors as
a whole performed the functions delegated to the compensation committee. No
member of the board of directors or the compensation committee serves as a
member of the board of directors or compensation committee of any entity that
has one or more executive officers serving as a member of our board of
directors or compensation committee.

Director Compensation

   We do not currently compensate our directors in cash for their service as
members of the board of directors, although they are reimbursed for expenses in
connection with attendance at board of director and compensation committee
meetings. Under our stock option plan, directors are eligible to receive stock
option grants at the discretion of the board of directors or other
administrator of the plan. During 1998, the board granted options to purchase
an aggregate of 373,088 shares to Marcelo A. Gumucio at an exercise price per
share of $0.64.

Executive Compensation

                           Summary Compensation Table

   The table below summarizes the compensation earned for services rendered to
us in all capacities for the fiscal year ended December 31, 1998 by our former
chief executive officer and our next four most highly compensated executive
officers who earned more than $100,000 during the fiscal year ended December
31, 1998. These executives are referred to as the Named Executive Officers
elsewhere in this prospectus.

<TABLE>
<CAPTION>
                                             Long-Term
                                            Compensation
                                               Awards
                                            ------------
                               Annual
                            Compensation
                         ------------------  Securities
Name and Principal                           Underlying
Position                 Salary($) Bonus($)  Options(#)
<S>                      <C>       <C>      <C>
Sunir Kapoor............  153,042   63,500    370,263
 Former Chief Executive
  Officer and
  President(1)

Martin Pagel............  128,750   25,000     18,994
 Chief Technical Officer

Nicole Eagan............  128,750   28,000     32,500
 Senior Vice President,
  Marketing and Sales

Thomas J. Reinemer......  128,750   28,000     35,000
 Vice President,
  International(2)

Rick D. Prime...........  128,750      --      12,500
 Former Vice President,
  Finance(3)

</TABLE>

- ---------------------
(1) Mr. Kapoor served as Chief Executive Officer and President of E-Stamp from
    February 1996 until February 1999. Robert H. Ewald joined E-Stamp as our
    Chief Executive Officer and President in February 1999. Mr. Ewald currently
    is compensated with an annual salary of $250,000 and a guaranteed bonus of
    $25,000.

(2) Mr. Reinemer served as Vice President, Operations from August 1996 until
    March 1999.

(3) Mr. Prime served as Vice President, Finance from October 1997 until July
    1999.


                                       47
<PAGE>

                       Option Grants in Last Fiscal Year

   The following table sets forth information with respect to stock options
granted to each of the Named Executive Officers in the fiscal year ended
December 31, 1998, including the potential realizable value over the ten-year
term of the options, based on assumed rates of stock appreciation of 5% and
10%, compounded annually, and based upon the fair market value at the date of
grant as determined by the board of directors which was equal to the exercise
price. These assumed rates of appreciation comply with the rules of the
Securities and Exchange Commission and do not represent our estimate of future
stock price. Actual gains, if any, on stock option exercises will be dependent
on the future performance of our common stock.

   In the fiscal year ended December 31, 1998, we granted options to purchase
up to an aggregate of 1,359,600 shares to employees, directors and consultants.
All options were granted under our 1996 Stock Option and Restricted Stock Plan
at exercise prices at or above the fair market value of our common stock on the
date of grant, as determined in good faith by the board of directors. All
options have a term of ten years. Optionees may pay the exercise price by cash,
certified check, or delivery of already-owned shares of our common stock. All
options to the Named Executive Officers are immediately exercisable upon grant;
however, any unvested shares may be repurchased by us at their cost in the
event of the optionee's termination of employment. All option shares vest over
four years, with 25% of the option shares vesting one year after the option
grant date, and the remaining option shares vesting ratably each quarter
thereafter.

<TABLE>
<CAPTION>
                                      Individual Grants
                         -------------------------------------------
                                                                         Potential
                                                                     Realizable Value
                                                                     at Assumed Annual
                         Number of  % of Total                        Rates of Stock
                         Securities   Options                              Price
                         Underlying Granted to                       Appreciation for
                          Options    Employees  Exercise                Option Term
                          Granted     In Last     Price   Expiration -----------------
Name                        (#)     Fiscal Year ($/share)    Date       5%      10%
<S>                      <C>        <C>         <C>       <C>        <C>      <C>
Sunir Kapoor............   74,013       5.4%      $0.64    11/01/08  $ 29,789 $ 75,492
                          296,250      21.8        0.64    12/15/08   119,238  302,174

Martin Pagel............   18,994       1.4        0.64    11/01/08     7,645   19,374

Nicole Eagan............   32,500       2.4        0.64    11/01/08    13,081   33,150

Thomas J. Reinemer......   35,000       2.6        0.64    11/01/08    14,087   35,700

Rick D. Prime...........   12,500       0.9        0.64    11/01/08     5,031   12,750
</TABLE>

   Aggregate Option Exercises in Last Fiscal Year and Fiscal Year-End Option
                                     Values

   The following table describes for the Named Executive Officers their option
exercises for the fiscal year ended December 31, 1998, and exercisable and
unexercisable options held by them as of December 31, 1998.

   The "Value of Unexercised In-the-Money Options at December 31, 1998" is
based on a value of $0.80 per share, the fair market value of our common stock
as of December 31, 1998, as determined by the board of directors, less the per
share exercise price, multiplied by the number of shares issued upon exercise
of the option. All options were granted under our 1996 Stock Option and
Restricted Stock Plan. The shares vest over four years, with 25% of the shares
vesting one year after the grant date and the remaining shares vesting ratably
each quarter thereafter.

<TABLE>
<CAPTION>
                                                    Number of Securities
                                                   Underlying Unexercised   Value of Unexercised In-
                                                   Options At December 31,    the-Money Options at
                                          Value           1998 (#)            December 31, 1998 ($)
                         Shares Acquired Realized ------------------------- -------------------------
Name                     on Exercise (#)   ($)    Exercisable Unexercisable Exercisable Unexercisable
<S>                      <C>             <C>      <C>         <C>           <C>         <C>
Sunir Kapoor(1).........     749,000     $23,063    370,263        --          $ --         $ --

Martin Pagel............     225,325       6,406     18,994        --            --           --

Nicole Eagan............     332,693       6,406     32,500        --            --           --

Thomas J. Reinemer......     306,920       6,406     35,000        --            --           --

Rick D. Prime...........     125,000         --         --         --            --           --
</TABLE>
- --------
(1) E-Stamp repurchased 409,878 unvested shares held by Mr. Kapoor in June
    1999.

                                       48
<PAGE>

1999 Stock Plan

   The board of directors adopted our 1999 Stock Plan, referred to as the 1999
Plan, in August 1999, and our stockholders subsequently approved our 1999 Stock
Plan . This stock option plan provides for the grant to employees of incentive
stock options within the meaning of Section 422 of the Internal Revenue Code of
1986, as amended, and for the grant to employees, directors and consultants of
nonstatutory stock options and stock purchase rights.

   As adjusted for our stock dividend prior to the completion of this offering,
a total of 2,500,000 shares of common stock were reserved for issuance, plus
annual increases, beginning in fiscal year 2000, equal to the lesser of:

  . 1,250,000 shares;

  . 3% of the outstanding shares on such date; or

  . a lesser amount determined by the board.

   As of October 1, 1999, options to purchase 266,753 shares of our common
stock were outstanding under the 1999 Plan, and a total of 460,765 shares that
have been issued pursuant to the 1999 Plan were outstanding.

   The stock plan administrator, which is the board of directors or a committee
of the board, administers the 1999 Plan. In the case of options intended to
qualify as "performance based compensation" within the meaning of the Internal
Revenue Code of 1986, as amended, the committee will consist of two or more
"outside directors" within the meaning of the Internal Revenue Code of 1986, as
amended.

   The administrator determines the exercise price of nonstatutory stock
options granted under the 1999 Plan, but with respect to nonstatutory stock
options intended to qualify as "performance based compensation" within the
meaning of the Internal Revenue Code of 1986, as amended, the exercise price
must be at least equal to the fair market value of the common stock on the date
of grant. The exercise price of incentive stock options granted under the 1999
Plan must be at least equal to the fair market value of the common stock on the
date of grant. For any participant who owns stock possessing more than 10% of
the voting power of all classes of our capital stock, the exercise price of any
incentive stock option must equal at least 110% of the fair value on the date
of grant and the term of such incentive stock option must not exceed five
years. The term of all other options granted under the stock option plan may
not exceed 10 years.

   An optionee must exercise an option granted under the 1999 Plan generally
within three months after the end of the optionee's status as an employee,
director or consultant of E-Stamp, or within 12 months after the optionee's
termination by death or disability, but in no event later than the expiration
of the option's term. Unless determined otherwise by the administrator, an
optionee generally may not transfer options and stock purchase rights granted
under the 1999 Plan.

   The administrator determines the exercise price of stock purchase rights
granted under the 1999 Plan. In the case of stock purchase rights, unless the
administrator determines otherwise, the restricted stock purchase agreement
entered into in connection with the exercise of the stock purchase rights
contains a repurchase option that we may exercise upon the voluntary or
involuntary termination of the purchaser's service with us for any reason,
including death or disability. The purchase price for shares we repurchase
under the restricted stock purchase agreements will be the original price paid
by the purchaser and may be paid by cancellation of any indebtedness of the
purchaser to us. The repurchase option lapses at a rate that the administrator
determines.

   The 1999 Plan provides that in the event of our merger with or into another
corporation or the sale of substantially all of our assets, the successor
corporation will assume or substitute each option or stock purchase right. If
the outstanding options or stock purchase rights are not assumed or
substituted, the administrator will provide notice to the optionee that he or
she has the right to exercise each outstanding option or stock purchase right
as to all of the shares subject to the option or stock purchase right,
including shares that would not otherwise be exercisable, for a period of 30
days from the date of the notice. The options and stock purchase rights will
terminate upon the expiration of the 30-day period.

                                       49
<PAGE>

   Unless terminated sooner, the 1999 Plan will terminate automatically in
2009. In addition, the administrator has the authority to amend, suspend or
terminate the 1999 Plan, provided that no such action may affect any share of
common stock previously issued and sold or any option previously granted.

1996 Stock Option and Restricted Stock Plan

   Our 1996 Stock Option and Restricted Stock Plan, referred to as the 1996
Plan, was adopted by the board of directors and subsequently approved by our
stockholders. The 1996 Plan provides for the grant to employees of incentive
stock options within the meaning of Section 422 of the Internal Revenue Code of
1986, as amended, and for the grant to employees and consultants of
nonstatutory stock options and restricted stock rights.

   The board of directors has determined that no future options or restricted
stock rights will be granted under our 1996 Plan after the effective date of
this offering. However, the board or a committee of our board of directors will
administer the options and stock purchase rights granted under the 1996 Plan
that are outstanding on the effective date of this offering. A total of
6,018,750 shares of common stock were authorized for issuance under the 1996
Plan. As of October 1, 1999, options to purchase an aggregate of 1,215,640
shares of our common stock were outstanding under this stock option plan, and a
total of 4,891,695 shares that have been issued pursuant to the exercise of
options granted under the 1996 Plan were outstanding.

   The options outstanding at the time of this offering will remain subject to
the terms of the agreements evidencing such options and the terms of the 1996
Plan. The 1996 Plan provides that in the event of a merger of the Company with
or into another corporation, or the sale of substantially all of the Company's
assets, each outstanding option will terminate immediately prior to such
transaction, unless determined otherwise by the plan administrator.

1999 Employee Stock Purchase Plan

   Our 1999 Employee Stock Purchase Plan was adopted by our board of directors
in August 1999, and was subsequently approved by our stockholders. A total of
500,000 shares of common stock has been reserved for issuance under the
purchase plan, plus annual increases equal to the lesser of:

  . 350,000 shares;

  . 1% of the outstanding shares on such date; or

  . a lesser amount determined by the board.

   The board of directors or a committee appointed by the board administers the
stock purchase plan. The board or its committee has full and exclusive
authority to interpret the terms of the stock purchase plan and determine
eligibility.

   Employees are eligible to participate if they are employed by us or any
participating subsidiary for at least 20 hours per week and more than five
months in any calendar year. However, the following employees may not be
granted options to purchase stock under the purchase plan:

  . any employee who immediately after grant owns stock possessing 5% or more
    of the total combined voting power or value of all classes of our capital
    stock; or

  . any employee whose rights to purchase stock under all of our employee
    stock purchase plans accrues at a rate which exceeds $25,000 worth of
    stock for each calendar year.

   The stock purchase plan, which is intended to qualify under Section 423 of
the United States tax code, contains consecutive, overlapping 24 month offering
periods. Each offering period includes four six-month purchase periods. The
offering periods generally start on the first trading day on or after May 15
and November 15 of each year, except for the first such offering period which
will commence on the first trading day on or after the effective date of this
offering and will end on the last trading day on or before November 14, 2001.

                                       50
<PAGE>

   Participants may purchase common stock through payroll deductions of up to
15% of the participant's eligible compensation. The maximum number of shares a
participant may purchase during a single offering period is 5,000 shares.

   Amounts deducted and accumulated by the participant are used to purchase
shares of common stock at the end of each offering period. The price of stock
purchased under the purchase plan is 85% of the lower of the fair market value
of the common stock at the beginning of the offering period and the end of each
offering period. In the event the fair market value at the end of a purchase
period is less than the fair market value at the beginning of the offering
period, participants will withdraw from the current offering period following
the exercise and will automatically re-enroll in a new offering period.
Participants may end their participation at any time during an offering period,
and they will be paid their payroll deductions to date. Participation ends
automatically upon termination of employment with E-Stamp.

   The purchase plan provides that, if we merge with or into another
corporation or sell substantially all of our assets, each outstanding option
may be assumed or substituted for by the successor corporation. If the
successor corporation refuses to assume or substitute for the outstanding
options, the offering period then in progress will be shortened and a new
exercise date will be set, which will occur before the proposed sale or merger.

   The purchase plan will become effective on the effective date of this
offering and will terminate in 2009. The board of directors has the authority
to amend or terminate the purchase plan, except that no such action may
adversely affect any outstanding rights to purchase stock.

1999 Director Option Plan

   Non-employee directors are entitled to participate in our 1999 Director
Option Plan. The board of directors adopted the director plan in August 1999,
and our stockholders subsequently approved the director plan, but it will not
become effective until the effective date of this offering. The director plan
has a term of ten years, unless terminated sooner by the board. A total of
300,000 shares of common stock have been reserved for issuance under the
director plan.

   The director plan provides for the automatic grant of 40,000 shares of
common stock to each non-employee director who first becomes a non-employee
director after adoption of this plan, and who does not beneficially hold more
than one percent (1%) of the total voting power of our voting securities on the
date of grant. The shares purchasable under this option shall vest over four
years at the rate of 1/48th per month. In addition, after this offering, each
non-employee director who has served on the board for at least the six previous
months, and who does not beneficially hold more than one percent (1%) of the
total voting power of our voting securities on the date of grant, will be
granted an option to purchase 2,500 shares of common stock on the date of each
annual meeting of our stockholders. The shares purchasable under this option
shall vest over one year at the rate of 1/12th per month. Each option granted
to a non-employee director under this director plan will have a term of ten
years. The exercise price of all options shall be 100% of the fair market value
per share of the common stock, generally determined with reference to the
closing price of the common stock as reported on the Nasdaq National Market on
the date of grant.

   Options granted under the director plan must be exercised within three
months of the end of the optionee's tenure as a director, or within twelve
months after such director's termination by death or disability to the extent
the option was exercisable on the date of termination, but not later than the
expiration of the option's ten year term.

1996 Non-Employee Director Stock Option Plan

   Our 1996 Non-Employee Director Stock Option Plan, referred to as the 1996
Director Plan, was adopted by the Board and approved by the stockholders. Our
board of directors terminated this 1996 Director Plan with

                                       51
<PAGE>

respect to future grants. However, outstanding options granted under this plan
will remain outstanding and subject to the terms and conditions of the
agreements evidencing such options and the terms of the 1996 Director Plan.

   A total of 125,000 shares of our common stock are authorized for issuance
under the 1996 Director Plan. As of October 1, 1999, a total of 19,063 shares
were subject to outstanding options granted under this plan. Although 105,937
shares remain available for further grant of options under the 1996 Director
Plan, no more options will be granted under this plan.

401(k) Plan

   We sponsor a 401(k) plan which provides eligible employees located in the
United States an opportunity to save money for their retirement on a tax
deferred basis. The 401(k) plan is intended to qualify under Sections 401(a)
and 401(k) of the Internal Revenue Code of 1986, as amended. Eligible employees
may elect to reduce their current eligible compensation by up to 15%, subject
to the statutory annual limit in 1999 of $10,000, and to have the amount of
such reduction contributed on their behalf to the 401(k) plan. We currently
provide a matching contribution to those eligible employees who have elected to
participate in the 401(k) plan equal to 50% of the first 4% of their eligible
contributions to the 401(k) plan. In addition, the 401(k) plan permits, but
does not require, an additional discretionary profit sharing contribution to be
made by us on behalf of eligible employees. To date, we have not made any such
discretionary profit sharing contribution to the 401(k) plan. Contributions
that are made to the 401(k) plan, whether if made by the eligible employees, or
by us, and the investment earnings thereon, are not taxable to employees until
such amounts are withdrawn from the 401(k) plan. However, any contributions
made by us will be deductible in the taxable year they are made. The 401(k)
plan may be amended or terminated by us at anytime, and in our sole discretion.

Employment Agreements

   We have issued offer letters to each of Robert H. Ewald, Anthony H. Lewis,
Jr., Roderick Witmond, Edward Malysz and Marcelo A. Gumucio pursuant to which
each is entitled to a base salary, bonuses and an option to purchase shares of
our common stock. In addition, we granted Mr. Ewald 125,000 shares of common
stock for our commencing an initial public offering within twelve months of his
employment start date. We agreed to provide Mr. Lewis with a promissory note in
the amount of $38,100 which will be forgiven in the event he is terminated
without cause prior to one year of service or upon completion of one year of
service from his start date. We agreed that if Mr. Gumucio is involuntarily
terminated within one year of his start date, 25% of his option shall become
immediately exercisable, and if we experience a change of control, Mr.
Gumucio's option shall become immediately exercisable.

   We have entered into employment agreements with each of Nicole Eagan, Martin
Pagel and Thomas J. Reinemer pursuant to which each is entitled to a base
salary, bonuses, an option to purchase shares of common stock and an option to
purchase shares of restricted common stock. All of these options have been
exercised in full and the shares issued thereunder are included in the share
amounts throughout this prospectus. Under these agreements, if any of Nicole
Eagan, Martin Pagel or Thomas J. Reinemer are terminated without cause, he or
she will be entitled to the payment of six months of his or her base salary.

Limitations on Directors' Liability and Indemnification

   Our certificate of incorporation limits the liability of directors to the
maximum extent permitted by Delaware law. Delaware law provides that directors
of a corporation will not be personally liable for monetary damages for breach
of their fiduciary duties as directors, except liability for any of the
following:

  . any breach of their duty of loyalty to the corporation or its
    stockholders;

  . acts or omissions not in good faith or which involve intentional
    misconduct or a knowing violation of law;

  . unlawful payments of dividends or unlawful stock repurchases or
    redemptions; or

  . any transaction from which the director derived an improper personal
    benefit.

                                       52
<PAGE>

   This limitation of liability does not apply to liabilities arising under the
federal securities laws and does not affect the availability of equitable
remedies such as injunctive relief or rescission.

   Our certificate of incorporation and bylaws provide that we shall indemnify
our directors and executive officers and may indemnify our other officers and
employees and other agents to the fullest extent permitted by law. We believe
that indemnification under our bylaws covers at least negligence and gross
negligence on the part of indemnified parties. Our bylaws also permit us to
secure insurance on behalf of any officer, director, employee or other agent
for any liability arising out of his or her actions in such capacity,
regardless of whether our bylaws would permit indemnification.

   We have entered into agreements to indemnify our directors and executive
officers, in addition to indemnification provided for in our bylaws. These
agreements, among other things, provide for indemnification of our directors
and executive officers for expenses, judgments, fines and settlement amounts
incurred by any such person in any action or proceeding arising out of such
person's services as a director or executive officer or at our request. We
believe that these provisions and agreements are necessary to attract and
retain qualified persons as directors and executive officers.

   The limited liability and indemnification provisions in our certificate of
incorporation and bylaws may discourage stockholders from bringing a lawsuit
against our directors for breach of their fiduciary duty and may reduce the
likelihood of derivative litigation against our directors and officers, even
though a derivative litigation, if successful, might otherwise benefit us and
our stockholders. A stockholder's investment in us may be adversely affected to
the extent we pay the costs of settlement or damage awards against our
directors or officers under these indemnification provisions.

   At present, there is no pending litigation or proceeding involving any of
our directors, officers or employees in which indemnification is sought, nor
are we aware of any threatened litigation that may result in claims for
indemnification.


                                       53
<PAGE>

                           RELATED PARTY TRANSACTIONS

   During the last two years, there has not been, nor is there currently
proposed, any transaction or series of similar transactions to which we were or
are to be a party in which the amount involved exceeds $60,000 and in which any
director, executive officer or holder of more than 5% of our common stock had
or will have a director or indirect interest other than compensation
arrangements, which are described where required under "Management," and the
transactions described below.

Equity Investment Transactions for Cash

   In September 1997, we sold 2,500,000 shares of Series A preferred stock for
$2.40 per share. In July 1998, we sold 4,188,000 shares of Series B preferred
stock for $3.82 per share. In August 1999, we sold 2,928,521 shares of Series C
preferred stock for $10.31 per share. Listed below are the directors, executive
officers and stockholders who beneficially own more than 5% of our securities
who participated in these financings. We have also indicated in the table below
the value of shares held by these individuals based on an assumed initial
public offering price of $15.00 per share. The assumed initial public offering
price of $15.00 per share does not represent our estimate of future stock
prices. Actual gains, if any, on sale of our shares will be dependent on the
future performance of our common stock.

<TABLE>
<CAPTION>
                                                                       Value of
                                                                       Shares at
                                                                        Assumed
                                                                        Initial
                                                          Aggregate     Public
                          Series A  Series B  Series C      Cash       Offering
Name                      Preferred Preferred Preferred Consideration    Price
<S>                       <C>       <C>       <C>       <C>           <C>
Microsoft Corporation...  1,250,000   261,750  109,231   $5,126,174   $30,393,394
Entities affiliated with
 AT&T Ventures(1).......  1,250,000   261,750  218,462    6,252,343    32,441,475
Canaan Equity, L.P......        --  1,047,000  151,302    5,559,463    22,468,163
Unified Holdings,
 L.L.C..................        --  1,047,000      --     4,000,000    19,631,250
John V. Balen(2)........        --  1,047,000  151,302    5,559,463    22,468,163
Thomas L. Rosch(3)......  1,250,000   261,750  218,462    6,252,343    32,441,475
Gregory S. Stanger(4)...  1,250,000   261,750  109,231    5,126,174    30,393,394
Adam Wagner(5)..........        --  1,047,000    5,416    4,055,379    19,732,800
Martin Pagel............        --        --     2,166   $   22,323   $    40,605
</TABLE>
- ---------------------
(1) Includes 1,125,000 shares of Series A preferred stock, 235,575 shares of
    Series B preferred stock and 196,616 shares of Series C preferred stock
    held by AT&T Venture Fund II, L.P. and 125,000 shares of Series A preferred
    stock, 26,175 shares of Series B preferred stock and 21,846 shares of
    Series C preferred stock held by Venture Fund I, L.P.

(2) Includes 1,047,000 shares of Series B preferred stock and 151,302 shares of
    Series C preferred stock held by Canaan Equity, L.P. Mr. Balen disclaims
    beneficial ownership of these shares.

(3) Includes 1,125,000 shares of Series A preferred stock, 235,575 shares of
    Series B preferred stock and 196,616 shares of Series C preferred stock
    held by AT&T Venture Fund II, L.P. and 125,000 shares of Series A preferred
    stock, 26,175 shares of Series B preferred stock and 21,846 shares of
    Series C preferred stock held by Venture Fund I, L.P. Mr. Rosch disclaims
    beneficial ownership of these shares.

(4) Includes 1,250,000 shares of Series A preferred stock, 261,750 shares of
    Series B preferred stock and 109,231 shares of Series C preferred stock
    held by Microsoft Corporation. Mr. Stanger disclaims beneficial ownership
    of these shares.

(5) Includes 1,047,000 shares of Series B preferred stock held by Unified
    Holdings, L.L.C. Mr. Wagner is a managing member of Unified Holdings,
    L.L.C. Wagner & Brown, Ltd., Mr. Wagner's employer, claims beneficial
    ownership of 130,875 shares and Wagner Family Partnership VI of which Mr.
    Wagner is a partner claims beneficial ownership of 45,021 shares. Includes
    2,708 shares of Series C preferred stock held by Wagner & Brown, Ltd. and
    2,708 shares of Series C preferred stock held by Wagner Family Partnership
    VI.

                                       54
<PAGE>

Sales of Equity Securities to Executive Officers

   On May 30, 1999, we sold 1,531,250 shares of common stock at a price of
$0.72 per share to Robert H. Ewald. We have the right to repurchase such shares
in the event Mr. Ewald's services to us terminate, which right lapses
progressively over four years after the date of grant. Mr. Ewald paid for such
shares with a full-recourse, five-year $1,102,500 promissory note, secured by
the purchased shares. The note bears interest at a rate of 6% per annum.

   On June 12, 1998, we sold an aggregate of 332,692 shares of common stock at
a price of $0.20 per share for 32,031 shares and $0.40 per share for 300,661
shares to Nicole Eagan. We have the right to repurchase such shares in the
event Ms. Eagan's services to us terminate, which right lapses progressively
over four years after the date of grant. Ms. Eagan paid for such shares with a
full-recourse, five-year $126,671 promissory note, secured by the purchased
shares. The note bears interest at a rate of 6% per annum.

   On June 12, 1998, we sold an aggregate of 225,325 shares of common stock at
a price of $0.20 per share for 32,031 shares and $0.40 per share for 193,294
shares to Martin Pagel. We have the right to repurchase such shares in the
event Mr. Pagel's services to us terminate, which right lapses progressively
over four years after the date of grant. Mr. Pagel paid for such shares with a
full-recourse, five-year $83,724 promissory note, secured by the purchased
shares. The note bears interest at a rate of 6% per annum.

   On June 12, 1998, we sold an aggregate of 306,920 shares of common stock at
a price of $0.20 per share for 32,031 shares and $0.40 per share for 274,889
shares to Thomas J. Reinemer. We have the right to repurchase such shares in
the event Mr. Reinemer's services to us terminate, which right lapses
progressively over four years after the date of grant. Mr. Reinemer paid for
such shares with a full-recourse, five-year $116,362 promissory note, secured
by the purchased shares. The note bears interest at a rate of 6% per annum.

   On June 28, 1999, we sold 187,500 shares of common stock at a price of $1.20
per share to Edward F. Malysz. We have the right to repurchase such shares in
the event Mr. Malysz's services to us terminate, which right lapses
progressively over four years after the date of grant. Mr. Malysz paid for such
shares with a full-recourse, five-year $225,000 promissory note, secured by the
purchased shares. The note bears interest at a rate of 6% per annum.

   On July 31, 1999, we sold 375,000 shares of common stock at a price of $1.20
per share to Anthony H. Lewis, Jr. We have the right to repurchase such shares
in the event Mr. Lewis' services to us terminate, which right lapses
progressively over four years after the date of grant. Mr. Lewis paid for such
shares with a full-recourse, five-year $450,000 promissory note, secured by the
purchased shares. The note bears interest at a rate of 6% per annum.

   On August 1, 1999, we sold 187,500 shares of common stock at a price of
$1.20 per share to Roderick Witmond. We have the right to repurchase such
shares in the event Mr. Witmond's services to us terminate, which right lapses
progressively over four years after the date of grant. Mr. Witmond paid for
such shares with a full-recourse, five-year $225,000 promissory note, secured
by the purchased shares. The note bears interest at a rate of 6% per annum.

   On August 18, 1999, we granted Mr. Ewald a stock bonus of 125,000 shares of
common stock. We have also agreed to loan Mr. Ewald up to $430,000 for the
purpose of satisfying his income tax liability associated with this stock
bonus. This loan will bear interest at a rate of 6% per annum and will be
forgivable over 2 years based on Mr. Ewald remaining our employee throughout
such period.

   On August 18, 1999, we granted Marcelo Gumucio a stock bonus of 62,500
shares of common stock. We have also agreed to loan Mr. Gumucio up to $215,000
for the purpose of satisfying his income tax liability associated with this
stock bonus. This loan will bear interest at a rate of 6% per annum and will be
forgivable over 2 years based on Mr. Gumucio's continuing service as a director
throughout such period.

                                       55
<PAGE>

Benefits to Executive Officers

   The following table sets forth:

  . the aggregate number of shares purchased by each of our executive
    officers during the last three years on an as converted to common stock
    basis after giving effect to our planned stock dividend;

  . the aggregate purchase price paid for those shares by each of our
    executive offices; and

  . the value of those shares based on an assumed initial public offering
    price of $15.00 per share.

   The assumed initial public offering price of $15.00 per share does not
represent our estimate of future stock prices. Actual gains, if any, on sale of
our shares will be dependent on the future performance of our common stock.

<TABLE>
<CAPTION>
                        Shares                   Value of Shares at
                       Purchased   Aggregate   Assumed Initial Public
Name                      (#)    Consideration     Offering Price
<S>                    <C>       <C>           <C>
Robert H. Ewald        1,656,250  $1,102,500        $24,843,750
Anthony H. Lewis, Jr.    375,000     450,000          5,625,000
Nicole Eagan             332,693     126,671          4,990,395
Martin Pagel             228,032     106,056          3,420,480
Roderick Witmond         187,500     225,000          2,812,500
Thomas J. Reinemer       318,170     116,362          4,772,550
Edward F. Malysz         187,500     225,000          2,812,500
Marcelo A. Gumucio       373,087     238,776          5,596,305
</TABLE>

Other Transactions

   We have entered into indemnification agreements with each of our executive
officers and directors.

   We have granted options to our executive officers and some of our directors.

   Holders of preferred stock are entitled to registration rights with respect
to the common stock issued or issuable upon conversion of the preferred stock.

   We believe that all related party transactions described above were on terms
no less favorable than could have been obtained from unrelated third parties.

                                       56
<PAGE>

                             PRINCIPAL STOCKHOLDERS

   The following table sets forth information regarding the beneficial
ownership of our common stock as of October 1, 1999, by the following
individuals or groups:

  . each person or entity who we know beneficially owns more than 5% of our
    outstanding stock;

  . each of the Named Executive Officers;

  . each of our directors; and

  . all directors and executive officers as a group.

   Unless otherwise indicated, the address for each stockholder listed in the
following table is c/o E-Stamp Corporation, 2855 Campus Drive, Suite 100, San
Mateo, California 94403. Beneficial ownership is determined in accordance with
the rules of the Securities and Exchange Commission. In computing the number of
shares beneficially owned by a person and the percentage ownership of that
person, shares of common stock subject to options or warrants held by that
person that are currently exercisable or will become exercisable within 60 days
after October 1, 1999, are deemed outstanding, while the shares are not deemed
outstanding for purposes of computing percentage ownership of any other person.
Except as otherwise indicated, and subject to applicable community property
laws, the persons named in the table have sole voting and investment power with
respect to all shares of common stock held by them.

   Applicable percentage ownership in the following table is based on
31,141,962 shares of common stock outstanding as of October 1, 1999, as
adjusted to reflect the conversion of all outstanding shares of preferred stock
upon the closing of this offering. The numbers shown in the table below assume
no exercise by the underwriters of their over-allotment option.

                          Principal Stockholders Table

<TABLE>
<CAPTION>
                                                               Percentage of
                                                                  Shares
                                                 Number of      Outstanding
                                                   Shares    -----------------
                                                Beneficially  Before   After
   Name                                           Owned(1)   Offering Offering
   <S>                                          <C>          <C>      <C>
   5% Stockholders:
   Entities affiliated with AT&T Ventures(2)...   2,162,764     6.9%     5.7%
   Microsoft Corporation(3)....................   2,026,226     6.5      5.4
   John Trotter(4).............................   2,043,893     6.6      5.4
   Directors and Executive Officers:
   Robert H. Ewald(5)..........................   1,656,250     5.3      4.4
   Anthony H. Lewis, Jr.(6)....................     375,000     1.2      1.0
   Martin Pagel(7).............................     247,025       *        *
   Nicole Eagan(8).............................     427,692     1.4      1.1
   Thomas J. Reinemer(9).......................     341,920     1.1        *
   Rick D. Prime(10)...........................     126,353       *        *
   Sunir Kapoor................................     342,506     1.1        *
   Marcelo A. Gumucio(11)......................     498,087     1.6      1.3
   John V. Balen(12)...........................   1,497,877     4.8      4.0
   Thomas L. Rosch(13).........................   2,162,764     7.0      5.7
   Gregory S. Stanger(14)......................   2,026,226     6.5      5.4
   Adam Wagner(15).............................   1,828,020     5.9      4.9
   All directors and executive officers as a
    group (14 persons)(16).....................  11,857,442    38.1     31.5
</TABLE>
- ---------------------
 *  Less than 1% of the outstanding shares of common stock.

(1) All share numbers in this table are on an as-converted to common basis
    giving effect to our planned stock dividend.


                                       57
<PAGE>

(2) The aggregated shares listed for entities affiliated with AT&T Ventures are
    owned as follows: 1,946,488 shares are beneficially owned by AT&T Venture
    Fund II, L.P. and 216,276 shares are beneficially owned by Venture Fund I,
    L.P. The address for AT&T Ventures is 3000 Sand Hill Road, Building 1,
    Suite 285, Menlo Park, CA 94025.

(3) The address for Microsoft Corporation is One Microsoft Way, Redmond, WA
    98502.

(4) Includes 306,993 shares of common stock held by Trotter 1993
    Grandchildren's Trust and 119,087 shares of common stock held by Trotter
    1993 Children's Trust. The address for Mr. Trotter is 1000 Louisiana #3600,
    Houston, Texas 77002.

(5) At October 1, 1999, 1,531,250 shares held by Mr. Ewald were unvested and
    subject to a right of repurchase in favor of us, which right lapses over
    time.

(6) At October 1, 1999, 375,000 shares held by Mr. Lewis were unvested and
    subject to a right of repurchase in favor of us, which right lapses over
    time.

(7) At October 1, 1999, 153,729 shares held by Mr. Pagel were vested, and
    74,303 shares were unvested and subject to a right of repurchase in favor
    of us, which right lapses over time. Includes 18,993 shares issuable upon
    exercise of options held by Mr. Pagel within 60 days of October 1, 1999,
    all of which would be subject to a right of repurchase in favor of us,
    which right lapses over time.

(8) At October 1, 1999, 210,869 shares held by Ms. Eagan were vested, and
    121,823 shares were unvested and subject to a right of repurchase in favor
    of us, which right lapses over time. Includes 95,000 shares issuable upon
    exercise of options held by Ms. Eagan within 60 days of October 1, 1999,
    all of which would be subject to a right of repurchase in favor of us,
    which right lapses over time.

(9) At October 1, 1999, 196,421 shares held by Mr. Reinemer were vested, and
    145,499 shares were unvested and subject to a right of repurchase in favor
    of us, which right lapses over time. Includes 35,000 shares issuable upon
    exercise of options held by Mr. Reinemer within 60 days of October 1, 1999,
    all of which would be subject to a right of repurchase in favor of us,
    which right lapses over time.

(10) At October 1, 1999, 54,687 shares held by Mr. Prime were vested, and
     70,313 shares were unvested and subject to a right of repurchase in favor
     of us, which right lapses over time.

(11) At October 1, 1999, 62,500 shares held by Mr. Gumucio were vested, and
     435,587 shares were unvested and subject to a right of repurchase in favor
     of us, which right lapses over time. Includes 62,500 shares issuable upon
     exercise of options held by Mr. Gumucio within 60 days of October 1, 1999,
     all of which would be subject to a right of repurchase in favor of us,
     which right lapses over time.

(12) The shares are beneficially owned by Canaan Equity, L.P. Mr. Balen is a
     principal of Canaan Partners. Mr. Balen disclaims beneficial ownership of
     these shares.

(13) 1,946,488 shares are beneficially owned by AT&T Venture Fund II, L.P. and
     216,276 shares are beneficially owned by Venture Fund I, L.P. Mr. Rosch is
     a partner at AT&T Ventures. Mr. Rosch disclaims beneficial ownership of
     these shares.

(14) The shares are beneficially owned by Microsoft Corporation. Mr. Stanger is
     Senior Director, Corporate Development at Microsoft Corporation. Mr.
     Stanger disclaims beneficial ownership of these shares.

(15) Includes 250,000 shares of common stock held by Wagner & Brown, Ltd, Mr.
     Wagner's employer. Mr. Wagner has disclaimed beneficial ownership of these
     shares. Includes 62,500 shares of common stock held by Wagner Family
     Partnership VI, of which Mr. Wagner is a partner. Mr. Wagner has a 12.5%
     beneficial ownership of these shares. Includes 200,000 shares of common
     stock held in escrow and for which Mr. Wagner is an escrow agent. Wagner &
     Brown, Ltd. claims beneficial ownership of 38,280 shares and Wagner Family
     Partnership VI claims beneficial ownership of 9,560 shares. Includes
     1,047,000 shares of Series B preferred stock, convertible into 1,308,750
     shares of common stock, held by Unified Holdings, L.L.C. Mr. Wagner is a
     managing member of Unified Holdings, L.L.C. Wagner & Brown, Ltd. claims
     beneficial ownership of 163,594 shares and Wagner Family Partnership VI
     claims beneficial

                                       58
<PAGE>

   ownership of 56,276 shares. Includes 2,708 shares of Series C preferred
   stock, convertible into 3,385 shares of common stock, held by Wagner &
   Brown, Ltd. and 2,708 shares of Series C preferred stock, convertible into
   3,385 shares of common stock, held by Wagner Family Partnership VI.


(16) Includes 678,206 shares issued under the 1999 Stock Plan and 1996 Stock
     Option and Restricted Stock Plan which were vested and 3,128,775 shares
     which were unvested at October 1, 1999 and subject to a right of
     repurchase in favor of us, which right lapses over time. Includes 211,493
     shares issuable upon exercise of options within 60 days of October 1,
     1999, all of which would be subject to a right of repurchase in favor of
     us, which right lapses over time.

                                       59
<PAGE>

                          DESCRIPTION OF CAPITAL STOCK

General

   Upon the completion of this offering, we will be authorized to issue
200,000,000 shares of common stock, $0.001 par value, and 10,000,000 shares of
undesignated preferred stock, $0.001 par value. The following description of
our capital stock does not purport to be complete and is subject to and
qualified in its entirety by our certificate of incorporation and bylaws, which
are included as exhibits to the registration statement of which this prospectus
forms a part, and by the provisions of applicable Delaware law.

Common Stock

   As of October 1, 1999, there were 31,141,962 shares of common stock
outstanding which were held of record by approximately 473 stockholders, as
adjusted for the conversion of all outstanding shares of convertible preferred
stock into common stock, which will occur upon the closing of this offering.

   The holders of common stock are entitled to one vote per share on all
matters to be voted upon by the stockholders. Our stockholders do not have
cumulative voting rights. Subject to preferences that may be applicable to any
outstanding preferred stock, the holders of common stock are entitled to
receive ratably such dividends, if any, as may be declared from time to time by
the board of directors out of funds legally available for that purpose. In the
event of our liquidation, dissolution or winding up, the holders of common
stock are entitled to share ratably in all assets remaining after payment of
liabilities, subject to prior distribution rights of preferred stock, if any,
then outstanding. The holders of common stock have no preemptive or conversion
rights or other subscription rights. There are no redemption or sinking fund
provisions applicable to the common stock. All outstanding shares of common
stock are fully paid and nonassessable. The shares of common stock to be issued
upon the closing of this offering will be fully paid and nonassessable.

Preferred Stock

   The board of directors has the authority, without action by the
stockholders, to designate and issue preferred stock in one or more series and
to designate the rights, preferences and privileges of each series, which may
be greater than the rights of the common stock. It is not possible to state the
actual effect of the issuance of any shares of preferred stock upon the rights
of holders of the common stock until the board of directors determines the
specific rights of the holders of such preferred stock. However, the effects
might include, among other things:

  . restricting dividends on the common stock;

  . diluting the voting power of the common stock;

  . impairing the liquidation rights of the common stock; or

  . delaying or preventing a change in control of us without further action
    by the stockholders.

   Upon the closing no shares of preferred stock will be outstanding, and we
have no present plans to issue any shares of preferred stock.

Warrants

   At October 1, 1999, there were warrants outstanding to purchase 21,235
shares of Series C preferred stock, which will be exercisable to purchase as
aggregate of 26,544 shares of common stock upon closing of this offering. At
October 1, 1999, there were warrants outstanding to purchase 48,496 shares of
common stock.

                                       60
<PAGE>

Registration Rights

   The holders of preferred stock convertible into 12,020,651 shares of common
stock, referred to as the registrable securities, are entitled to rights with
respect to registration of such shares under the Securities Act. These rights
are provided under the terms of an agreement between the holders of registrable
securities and us. Beginning 180 days following the date of this prospectus,
holders of at least 25% of the then outstanding registrable securities obtained
from conversion of our Series A preferred stock, or such lesser percentage if
the anticipated aggregate offering price would exceed $15,000,000, may require
on one occasion that we register their shares for public resale. Beginning 180
days following the date of this prospectus, holders of at least 25% of the then
outstanding registrable securities obtained from conversion of our Series B
preferred stock, or such lesser percentage if the anticipated aggregate
offering price would exceed $15,000,000 may require on one occasion that we
register their shares for public resale. Beginning 180 days following the date
of this prospectus, holders of at least 25% of the then outstanding registrable
securities obtained from conversion of our Series C preferred stock, or such
lesser percentage of the anticipated aggregate offering price would exceed
$15,000,000, may require on one occasion that we register their shares for
public resale. However, we may defer such registration for 90 days in view of
market conditions. Also, holders of registrable securities may require on two
separate occasions within any twelve month period that we register their shares
for public resale on Form S-3 or similar short-form registration if the value
of the securities to be registered is at least $500,000, however we may defer
such registration for 90 days in view of market conditions. Furthermore, in the
event we elect to register any of our shares of common stock for purposes of
effecting any public offering, the holders of registrable securities are
entitled to include their shares of common stock in the registration, but we
may reduce the number of shares proposed to be registered in view of market
conditions. These registration rights have been waived with respect to this
offering. All expenses in connection with any registration, other than
underwriting discounts and commissions, will be borne by us. All registration
rights will terminate five years following the consummation of this offering,
or, with respect to each holder of registrable securities, at such time as the
holder is entitled to sell all of its shares in any 90 day period under Rule
144 of the Securities Act.

Delaware Anti-Takeover Law and Charter and Bylaw Provisions

   Provisions of Delaware law and our certificate of incorporation and bylaws
could make the following more difficult:

  . the acquisition of us by means of a tender offer;

  . acquisition of us by means of a proxy contest or otherwise; or

  . the removal of our incumbent officers and directors.

   These provisions, summarized below, are expected to discourage coercive
takeover practices and inadequate takeover bids. These provisions are also
designed to encourage persons seeking to acquire control of us to first
negotiate with our board. We believe that the benefits of increased protection
of our potential ability to negotiate with the proponent of an unfriendly or
unsolicited proposal to acquire or restructure us outweigh the disadvantages of
discouraging such proposals because negotiation of such proposals could result
in an improvement of their terms.

   Election and Removal of Directors. Our board of directors is divided into
three classes. The directors in each class will serve for a three-year term,
one class being elected each year by our stockholders. This system of electing
and removing directors may tend to discourage a third party from making a
tender offer or otherwise attempting to obtain control of us because it
generally makes it more difficult for stockholders to replace a majority of the
directors.

   Stockholder Meetings. Under our certificate of incorporation, only the board
of directors, the chairman of the board and the chief executive officer may
call special meetings of stockholders.

                                       61
<PAGE>

   Requirements for Advance Notification of Stockholder Nominations and
Proposals. Our bylaws establish advance notice procedures with respect to
stockholder proposals and the nomination of candidates for election as
directors, other than nominations made by or at the direction of the board of
directors or a committee of the board.

   Delaware AntiTakeover Law. We are subject to Section 203 of the Delaware
General Corporation Law, an anti-takeover law. In general, Section 203
prohibits a publicly held Delaware corporation from engaging in a "business
combination" with an "interested stockholder" for a period of three years
following the date the person became an interested stockholder, unless the
"business combination" or the transaction in which the person became an
interested stockholder is approved in a prescribed manner. Generally, a
"business combination" includes a merger, asset or stock sale, or other
transaction resulting in a financial benefit to the interested stockholder.
Generally, an "interested stockholder" is a person who, together with
affiliates and associates, owns or within three years prior to the
determination of interested stockholder status, did own, 15% or more of a
corporation's voting stock. The existence of this provision may have an anti-
takeover effect with respect to transactions not approved in advance by the
board of directors, including discouraging attempts that might result in a
premium over the market price for the shares of common stock held by
stockholders.

   Elimination of Stockholder Action By Written Consent. Our certificate of
incorporation eliminates the right of stockholders to act by written consent
without a meeting at any time when we have 500 or more record stockholders.

   Elimination of Cumulative Voting. Our certificate of incorporation and
bylaws do not provide for cumulative voting in the election of directors.

   Undesignated Preferred Stock. The authorization of undesignated preferred
stock makes it possible for the board of directors to issue preferred stock
with voting or other rights or preferences that could impede the success of
any attempt to change control of us. These and other provisions may have the
effect of deferring hostile takeovers or delaying changes in control or
management of us.

   Amendment of Charter Provisions. The amendment of any of the above
provisions would require approval by holders of at least 66 2/3% of the
outstanding common stock.

Transfer Agent and Registrar

   The transfer agent and registrar for the common stock is Continental Stock
Transfer and Trust Company.

Nasdaq National Market Listing

   Our common stock has been approved for quotation on The Nasdaq National
Market under the symbol "ESTM."

                                      62
<PAGE>

                                RESCISSION OFFER

   Shares issued, and option grants made under, our 1999 Stock Plan, our 1996
Stock Option and Restricted Stock Plan and our 1996 Non-Employee Director Stock
Option Plan were not exempt from registration or qualification under federal
and state securities laws, and these stock issuances and option grants violated
the registration requirements of federal and state securities laws because
registration or qualification was not obtained. We intend to make a rescission
offer to the holders of these shares and options approximately 30 days after
the effective date of this offering pursuant to a registration statement filed
under the Securities Act of 1933, as amended. Offerees will be able to accept
our rescission offer prior to its expiration date by returning to us shares to
be repurchased and an election notice that we will deliver to the offerees
together with the prospectus for our rescission offer. If accepted, our
rescission offer could require us to make aggregate payments to the holders of
these shares and options of up to approximately $6,900,000 plus statutory
interest. We currently expect to use a portion of the proceeds from this
offering to make such payments, if any are required.

   This rescission offer will cover an aggregate of 273,265 shares of common
stock issued under the 1999 Stock Plan and 4,891,695 shares of common stock
issued under the 1996 Stock Option and Restricted Stock Plan, which shares were
sold in violation of the registration requirements of the federal and state
securities laws. We were unable to rely upon Rule 701 under the Securities Act
because the amount of securities sold exceeded the limits set forth in Rule
701. Because of the frequency and number of sales, including the number of
persons who received offers and purchased shares, the private placement
exemption under federal securities laws was also not available for these stock
issuances. We were also unable to rely on the exemption provided by Section
25102(f) of the California Corporation Code because these shares were issued to
more than 35 persons during a 12 month period, or on the exemption provided by
Section 25102(o) of the California Corporation Code because the required filing
under that section was not made. We will offer to rescind such prior sales at
the price per share paid therefor, an average price of $6.88 per share under
the 1999 Stock Plan and an average price of $0.90 per share under the 1996
Stock Option and Restricted Stock Plan, plus interest thereon at a statutory
rate as the case may be from the date of purchase by the purchaser to the
expiration of the rescission offer. The rescission offer will expire
approximately 30 days after the effectiveness of the registration statement
relating to the rescission stock. Under the rescission offer, we would be
required to make an aggregate payment of approximately $6,300,000 plus the
aggregate amount of interest thereon, if all offerees accept the offer.
Offerees who do not accept the rescission offer will, for purposes of
applicable federal and state securities laws, be deemed to hold registered
shares under the Securities Act which will be freely tradeable in the public
market as of the effective date of the registration statement with respect to
the rescission stock. The Securities Act does not expressly provide that a
rescission offer will terminate a purchaser's right to rescind a sale of stock
which was not registered under the Securities Act as required. Accordingly,
should the rescission offer be rejected by any or all offerees, we may continue
to be contingently liable under the Securities Act for the purchase price of
these shares up to an aggregate amount of approximately $6,300,000 plus
statutory interest.

   In addition, we were unable to rely on the exemption provided by Section
25102(f) of the California Corporation Code for our options to purchase shares
of common stock granted under our 1999 Stock Plan, our 1996 Stock Option and
Restricted Stock Plan and our 1996 Non-Employee Director Stock Option Plan
because options were granted to more than 35 persons during a 12 month period,
or on the exemption provided by Section 25102(o) of the California Corporation
Code because the required filing under that section was not made. As of October
1, 1999, options to purchase 273,265 shares of common stock at a weighted
average exercise price of $6.88 per share were outstanding under our 1999 Stock
Plan, options to purchase 1,118,308 shares of common stock at a weighted
average exercise price of $0.90 per share were outstanding under our 1996 Stock
Option and Restricted Stock Plan, and options to purchase 19,062 shares of
common stock at a weighted average exercise price of $0.40 per share were
outstanding under our 1996 Non-Employee Director Option Plan, all of which
options are potentially subject to rescission, and we plan to include them in
our planned rescission offer discussed above. Under such rescission offer, we
could be required to make an aggregate payment of up to approximately $600,000
for such grants.

   As of the date hereof, we are not aware of any claims for rescission against
us.

                                       63
<PAGE>

                        SHARES ELIGIBLE FOR FUTURE SALE

   Prior to this offering, there has been no market for our common stock, and
there can be no assurance that a significant public market for our common stock
will develop or be sustained after this offering. Future sales of substantial
amounts of common stock, including shares issued upon exercise of outstanding
options and warrants, in the public market following this offering could
adversely affect market prices prevailing from time to time and could impair
our ability to raise capital through sale of its equity securities. Sales of
substantial amounts of our common stock in the public market could adversely
affect the prevailing market price and our ability to raise equity capital in
the future. As described below, only 2,097,632 shares currently outstanding
will be available for sale immediately after this offering because of
contractual restrictions on resale and resale restrictions under the federal
securities laws.

   Upon completion of this offering, we will have outstanding 37,641,962 shares
of common stock based upon shares outstanding as of October 1, 1999, assuming
no exercise of the underwriters' over-allotment option and no exercise of
outstanding options or warrants prior to completion of this offering. Of these
shares, the 6,500,000 shares sold in this offering will be freely tradable
without restriction under the Securities Act except for any shares purchased by
our "affiliates" as that term is defined in Rule 144 under the Securities Act
and for any shares purchased in our directed shares program which will be
subject to 180 day lock-up agreements. The remaining 31,141,962 shares of
common stock held by existing stockholders are restricted shares as that term
is defined in Rule 144. These restricted shares may be sold in the public
market only if registered under the Securities Act or pursuant to an exemption
from registration under the Securities Act. As a result of the lock-up
agreements described below and the provisions of Rule 144 and 144(k), the
restricted shares will become eligible for sale in the public market as
follows:

  . 2,097,632 shares will become eligible for sale on the date of this
    prospectus,

  . 113,576 shares will become eligible for sale 90 days after the date of
    this prospectus,

  . 19,854,064 shares will become eligible for sale 180 days after the date
    of this prospectus, and

  . the remaining 9,076,690 shares will become eligible for sale from time to
    time more than 180 days after the date of this prospectus.

   In addition, as of October 1, 1999, there were outstanding options to
purchase 1,419,893 shares of common stock, warrants to purchase 48,496 shares
of common stock and warrants to purchase preferred stock convertible into
26,544 shares of common stock, some of which may be exercised prior to this
offering. Officers, directors, and stockholders holding 28,203,238 shares have
entered into lock-up agreements providing that, with certain limited
exceptions, the stockholder will not offer, sell, contract to sell or otherwise
dispose of any common stock or any securities that are convertible into common
stock for a period of 180 days after the date of this prospectus without the
prior written consent of Donaldson, Lufkin & Jenrette Securities Corporation.
Donaldson, Lufkin & Jenrette Securities Corporation may, in its sole discretion
and at any time without notice, release all or any portion of the securities
subject to lock-up agreements.

   In general, under Rule 144 as currently in effect, beginning 90 days after
the date of this prospectus, a person who has beneficially owned restricted
shares for at least one year including the holding period of any prior owner
except an affiliate would be entitled to sell within any three-month period a
number of shares that does not exceed the greater of:

  . 1% of the number of shares of common stock then outstanding which will
    equal approximately shares immediately after this offering; or

  . the average weekly trading volume of the common stock during the four
    calendar weeks preceding the filing of a Form 144 with respect to such
    sale.

   Sales under Rule 144 are also subject to manner of sale provisions and
notice requirements and to
the availability of current public information about us. Under Rule 144(k), a
person who is not deemed to have

                                       64
<PAGE>

been an affiliate of us at any time during the three months preceding a sale,
and who has beneficially owned the shares proposed to be sold for at least two
years including the holding period of any prior owner except an affiliate, is
entitled to sell such shares without complying with the manner of sale, public
information, volume limitation or notice provisions of Rule 144.

   Within 90 days following the effectiveness of this offering, we will file a
Registration Statement on Form S-8 registering 4,261,336 shares of common stock
subject to outstanding options or reserved for future issuance under our stock
plans. As of October 1, 1999, options to purchase a total 1,419,893 shares were
outstanding and 2,576,229 shares were reserved for future issuance under our
stock plans. Common stock issued upon exercise of outstanding vested options or
issued under our purchase plan, other than common stock issued to our
affiliates, is available for immediate resale in the open market.

   Also beginning six months after the date of this offering, holders of
12,020,651 restricted shares will be entitled to registration rights for sale
in the public market. Registration of such shares under the Securities Act
would result in such shares becoming freely tradable without restriction under
the Securities Act, except for shares purchased by affiliates, immediately upon
the effectiveness of such registration.

                                       65
<PAGE>

                                  UNDERWRITING

   Subject to the terms and conditions contained in an underwriting agreement
dated      , 1999, the underwriters named below, who are represented by
Donaldson, Lufkin & Jenrette Securities Corporation, Banc of America Securities
LLC, Deutsche Bank Securities Inc. and DLJdirect Inc., have severally agreed to
purchase from us the respective number of shares of common stock set forth
opposite their names below:

<TABLE>
<CAPTION>
                                                                          Number
                                                                            of
   Underwriters:                                                          Shares
   <S>                                                                    <C>
   Donaldson, Lufkin & Jenrette Securities Corporation...................
   Banc of America Securities LLC........................................
   Deutsche Bank Securities Inc..........................................
   DLJdirect Inc. .......................................................
                                                                           ---
     Total...............................................................
                                                                           ===
</TABLE>

   The underwriting agreement provides that the obligations of the underwriters
to purchase and accept delivery of the shares of common stock in the offering
are subject to approval by their counsel of legal matters concerning the
offering and to condition precedents that must be satisfied by us. The
underwriters are obligated to purchase and accept delivery of all the shares of
common stock in the offering, other than those shares covered by the over-
allotment option described below, if any are purchased.

   The underwriters initially propose to offer the shares of common stock in
part directly to the public at the initial public offering price set forth on
the cover page of this prospectus and in part to dealers, including the
underwriters, at such price less a concession not in excess of $   per share.
The underwriters may allow, and such dealers may re-allow, to other dealers a
concession not in excess of $   per share. After the initial offering of the
common stock, the public offering price and other selling terms may be changed
by the Representatives at any time without notice. The underwriters do not
intend to confirm sales to any accounts over which they exercise discretionary
authority. An electronic prospectus will be available on the Web site
maintained by DLJdirect Inc. DLJdirect account holders with at least $100,000
in their accounts will be able to express an interest in purchasing shares in
the offering. DLJdirect will allocate shares among those account holders who
have expressed interest based on its subjective judgement of what is E-Stamp's
best interest. In making this judgement, DLJdirect will consider the account
holder's asset level, investment objectives, trading history, tenure with
DLJdirect and post-offering activity in previous offerings.

   We have granted to the underwriters an option, exercisable for 30 days after
the date of this prospectus, to purchase, from time to time, in whole or in
part, up to an aggregate of additional shares of common stock at the initial
public offering price less underwriting discounts and commission. The
underwriters may exercise the option solely to cover over-allotments, if any,
made in connection with the offering. To the extent that the underwriters
exercise the option, each underwriter will become obligated, subject to
conditions contained in the underwriting agreement, to purchase its pro rata
portion of such additional shares based on the underwriters' percentage
underwriting commitment as indicated in the above table.

   The following table sets forth the items of compensation considered to be
underwriting compensation under the rules of the National Association of
Securities Dealers, Inc.:

<TABLE>
<CAPTION>
                                  Per Share                   Total
                            --------------------- -----------------------------
                             Without
                              Over-    With Over-    Without          With
                             Allotment  Allotment Over-Allotment Over-Allotment
<S>                         <C>        <C>        <C>            <C>
Underwriting discounts and
 commissions
 paid by us...............     $          $            $              $
Additional deemed
 compensation paid by us..
                               ----       ----         ----           ----
Total.....................     $          $            $              $
</TABLE>

                                       66
<PAGE>


   We will pay the offering expenses, estimated to be $1.0 million. We will pay
to the underwriters underwriting discounts and commissions in an amount equal
to the public offering price per share of common stock less the amount the
underwriters pay to us per share of common stock.

   Donaldson, Lufkin & Jenrette Securities Corporation acted as the placement
agent for private placements of E-Stamp's Series C Preferred Stock in August
1999 and E-Stamp's common stock in September 1999. As compensation for its
services as placement agent, Donaldson, Lufkin & Jenrette Securities
Corporation received a cash fee of $1,225,000 and warrants to purchase an
aggregate of 21,235 shares of Series C preferred stock at an exercise price of
$10.31 per share, the same price per share paid by all investors who
participated in the private placement. This warrant will entitle Donaldson,
Lufkin & Jenrette Securities Corporation to acquire 26,543 shares of common
stock at an exercise price of $8.25 upon completion of the Company's planned
1.25 for 1 stock dividend and the closing of this offering. Several entities
affiliated with Donaldson, Lufkin & Jenrette Securities Corporation also
invested in the August 1999 private placement, purchasing an aggregate of
87,294 shares of Series C preferred stock on the same terms and conditions as
the other investors in the private placement, including price per share. These
87,294 shares of Series C preferred stock will automatically convert into
109,117 shares of common stock upon the closing of this offering.

   An additional 11,915 shares of Series C preferred stock were purchased in
the August 1999 private placement by associated persons of other members of the
National Association of Securities Dealers, Inc. that are participating in the
underwriting syndicate for this offering, on the same terms and conditions as
the other investors in the private placement, including price per share. These
11,915 shares of Series C preferred stock will automatically convert into
14,893 shares of common stock upon the closing of this offering.

   Pursuant to the rules of the National Association of Securities Dealers,
Inc. the warrant issued to Donaldson, Lufkin & Jenrette Securities Corporation,
44,718 shares of Series C preferred stock purchased by entities affiliated with
Donaldson, Lufkin & Jenrette Securities Corporation and 11,915 shares of Series
C Preferred Stock purchased by associated persons of other members of the
National Association of Securities Dealers, Inc. that are participating in the
underwriting syndicate for the offering are presumed to be underwriting
compensation. The additional deemed compensation included in the chart above
was computed in accordance with the rules of the National Association of
Securities Dealers, Inc.

   Prior to the closing of this offering, Donaldson, Lufkin & Jenrette
Securities Corporation will exercise the warrant described above. Under the
rules of the National Association of Securities Dealers, Inc., the 26,543
shares of common stock issuable upon exercise of the warrant issued to
Donaldson, Lufkin & Jenrette Securities Corporation, the 55,897 shares of
common stock issuable upon conversion of the Series C preferred stock purchased
by entities affiliated with Donaldson, Lufkin & Jenrette Securities Corporation
and the 14,893 shares of common stock issuable upon conversion of the Series C
preferred stock purchased by associated persons of the other members of the
National Securities Association of Securities Dealers, Inc. participating in
the underwriting syndicate for the offering that are presumed to be
underwriting compensation, are restricted as to sale, transfer, assignment,
pledge, or hypothecation for a period of one year following the effective date
of this offering, except for transfers to officers or partners of the entities
currently holding these securities.

   We have agreed to indemnify the underwriters against liabilities which may
arise in connection with the offering, including liabilities under the
Securities Act of 1933, or to contribute to payments that the underwriters may
be required to make.

   Our executive officers, directors and other stockholders and option holders
have agreed not to:

  .  offer, pledge, sell, contract to sell, sell any option or contract to
     purchase, purchase any option or contract to sell, grant any option,
     right or warrant to purchase, lend, or otherwise transfer or dispose of,
     directly or indirectly, any shares of common stock, other than shares
     acquired in the initial public offering or on the Nasdaq National
     Market, or any securities convertible into or exercisable or
     exchangeable for common stock; or

                                       67
<PAGE>

  .  enter into any swap or other arrangement that transfers to another, in
     whole or in part, any of the economic consequences of ownership of the
     common stock, whether any such transaction described above is to be
     settled by delivery of common stock or other securities, in cash, or
     otherwise.

   Donaldson, Lufkin & Jenrette Securities Corporation may choose to release
some of these shares from such restrictions prior to the expiration of the 180-
day lock-up period with or without notice, although it has no current intention
of doing so.

   In addition, during such 180-day period, we have also agreed not to file any
registration statement with respect to, and each of our executive officers,
directors and stockholders have agreed not to make any demand for, or exercise
any right with respect to, the registration of any shares of common stock or
any securities convertible into or exercisable or exchangeable for common stock
without the prior written consent of Donaldson, Lufkin & Jenrette Securities
Corporation.

   Prior to the offering, there has been no established trading market for the
common stock. The initial public offering price of the shares of common stock
offered will be determined by negotiation among E-Stamp and the underwriters.
The factors to be considered in determining the initial public offering price
include:

  . the history of and the prospects for the industry in which we compete;

  . our past and present operations;

  . our historical results of operations;

  . our prospects for future operational results;

  . the recent market prices of securities of generally comparable companies;
    and

  . the general condition of the securities markets at the time of the
    offering.

   Other than in the United States, no action has been taken by us or the
underwriters that would permit a public offering of the shares of common stock
offered in any jurisdiction where action for that purpose is required. The
shares of common stock offered may not be offered or sold, directly or
indirectly, nor may this prospectus or any other offering material or
advertisements in connection with the offer and sale of any such shares of
common stock be distributed or published in any jurisdiction, except under
circumstances that will result in compliance with the applicable rules and
regulations of such jurisdiction. Persons into whose possession this prospectus
comes are advised to inform themselves about and observe any restrictions
relating to the offering and the distribution of this prospectus. This
prospectus does not constitute an offer to sell or a solicitation of any offer
to buy any shares of common stock offered in any jurisdiction in which such an
offer or a solicitation is unlawful.

   In connection with the offering, the underwriters may engage in transactions
that stabilize, maintain or otherwise affect the price of the common stock.
Specifically, the underwriters may over-allot the offering, creating a
syndicate short position. The underwriters may bid for and stabilize the price
of the common stock. In addition, the underwriting syndicate may reclaim
selling concessions from syndicate members and selected dealers if they
repurchase previously distributed common stock in syndicate covering
transactions, in stabilizing transactions or otherwise. These activities may
stabilize or maintain the market price of the common stock above independent
market levels. The underwriters are not required to engage in these activities,
and may end any of these activities at any time.

   At our request, the underwriters have reserved for sale, at the initial
public offering price, up to five percent of the shares offered hereby to be
sold to people associated with us, such as employees, vendors, suppliers, and
other persons that have relationships with or are interested in developing
relationships with us such as service providers and potential vendors,
suppliers and customers. No shares have been reserved for sale to our directors
or officers. Indications of interest will be sought by means of a written
notice, which conforms to Rule 134, accompanied by a copy of this prospectus.
The number of shares of our common stock available for sale to the general
public will be reduced to the extent that those persons purchase the reserved
shares. All reserved shares purchased by those persons will be subject to a
180-day lock-up agreement. Any reserved shares which are not confirmed for
purchase will be offered by the underwriters to the general public on the same
terms as the other shares offered by this prospectus.

                                       68
<PAGE>

                                 LEGAL MATTERS

   The validity of the common stock offered hereby will be passed upon for us
by Wilson Sonsini Goodrich & Rosati, Professional Corporation, Palo Alto,
California. Selected legal matters in connection with this offering will be
passed upon for the underwriters by Pillsbury Madison & Sutro LLP, Palo Alto,
California. As of the date of this prospectus, an investment partnership
composed of members of and persons associated with Wilson Sonsini Goodrich &
Rosati, Professional Corporation, as well as some individual attorneys of this
firm, beneficially own an aggregate of 18,728 shares of our Series C preferred
stock.

                                    EXPERTS

   Ernst & Young, LLP, independent auditors, have audited our financial
statements at December 31, 1997 and 1998, and for each of the three years in
the period ended December 31, 1998, as set forth in their report. We have
included our financial statements in the prospectus and elsewhere in the
registration statement in reliance on Ernst & Young LLP's report, given upon
the authority of such firm as experts in accounting and auditing.

   Statements in this prospectus and registration statement under the caption
"Risk Factors--Intellectual property infringement claims, including a claim
asserted by Pitney Bowes against us, could prevent or hinder our ability to
sell Internet postage" and in the first two paragraphs under the caption
"Business--Legal Proceedings" have been reviewed and approved by Howrey &
Simon, patent litigation counsel to E-Stamp, as experts in such matters, and
are included herein in reliance upon its review and approval.

                                       69
<PAGE>

                             ADDITIONAL INFORMATION

   We have filed with the Securities and Exchange Commission a registration
statement on Form S-1 with respect to the common stock offered by this
prospectus. This prospectus, which constitutes a part of the registration
statement, does not contain all of the information set forth in the
registration statement or the exhibits and schedules which is part of the
registration statement. For further information with respect to us and our
common stock, see the registration statement and the exhibits and schedules
thereto. Any document we file may be read and copied at the Commission's public
reference rooms in Washington, D.C., New York, New York and Chicago, Illinois.
Please call the Commission at 1-800-SEC-0330 for further information about the
public reference rooms. Our filings with the Commission are also available to
the public from the Commission's Web site at http://www.sec.gov.

   Upon completion of this offering, we will become subject to the information
and periodic reporting requirements of the Securities Exchange Act and,
accordingly, will file periodic reports, proxy statements and other information
with the Commission. Such periodic reports, proxy statements and other
information will be available for inspection and copying at the Commission's
public reference rooms, and the Web site of the Commission referred to above.

                                       70
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                         INDEX TO FINANCIAL STATEMENTS

<TABLE>
<S>                                                                         <C>
Report of Ernst & Young LLP, Independent Auditors.......................... F-2
Balance Sheets............................................................. F-3
Statements of Operations................................................... F-4
Statements of Common Stock Subject to Rescission, Redeemable Convertible
 Preferred Stock and Stockholders' Equity (Deficit)........................ F-5
Statements of Cash Flows................................................... F-8
Notes to Financial Statements.............................................. F-9
</TABLE>


                                      F-1
<PAGE>

               REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

The Board of Directors and Stockholders
E-Stamp Corporation

   We have audited the accompanying balance sheets of E-Stamp Corporation (a
development stage company) as of December 31, 1997 and 1998, and the related
statements of operations, common stock subject to rescission, redeemable
convertible preferred stock and stockholders' equity (deficit), and cash flows
for each of the three years in the period ended December 31, 1998. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.

   We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

   In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of E-Stamp Corporation at
December 31, 1997 and 1998, and the results of its operations and its cash
flows for each of the three years in the period ended December 31, 1998, in
conformity with generally accepted accounting principles.

                                          /s/ ERNST & YOUNG LLP

Palo Alto, California
February 19, 1999,

except for the "Stock Subject to Rescission" paragraphs of Note 4 and for Note
10 as to which the date is October 6, 1999.

                                      F-2
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                                 BALANCE SHEETS
                    (In thousands, except par value amounts)

<TABLE>
<CAPTION>
                                                                         Pro forma
                                          December 31,                 Stockholders'
                                        -----------------   June 30,     Equity at
                                         1997      1998       1999     June 30, 1999
                                                           (Unaudited)  (Unaudited)
 <S>                                    <C>      <C>       <C>         <C>
                ASSETS
                ------

 Current assets:
   Cash and cash equivalents..........  $ 4,111  $ 10,217   $  1,916
   Other current assets...............       24       144        498
                                        -------  --------   --------
 Total current assets.................    4,135    10,361      2,414
 Property and equipment:
   Computers..........................      964     1,039      1,350
   Furniture and fixtures.............      198       165        192
   Leasehold improvements.............       30        --         49
                                        -------  --------   --------
                                          1,192     1,204      1,591
   Accumulated depreciation and
    amortization......................     (596)     (754)      (909)
                                        -------  --------   --------
 Net property and equipment...........      596       450        682
 Other assets.........................       32        --         --
                                        -------  --------   --------
     Total assets.....................  $ 4,763  $ 10,811   $  3,096
                                        =======  ========   ========

 LIABILITIES AND STOCKHOLDERS' EQUITY
               (DEFICIT)
 ------------------------------------
 Current liabilities:
   Accounts payable and accrued
    liabilities.......................  $ 1,701  $  1,529   $  2,718
   Current portion of obligations
    under capital lease...............       36        27         20
                                        -------  --------   --------
 Total current liabilities............    1,737     1,556      2,738
 Capital lease obligations............       38        11          6

 Commitments and contingencies........
 Common stock subject to rescission,
  $0.001 par value per share: 68,
  1,974 and 3,844 shares issued and
  outstanding at December 31, 1997 and
  1998 and June 30, 1999 (3,844 pro
  forma)..............................      252       971      2,499
 Redeemable convertible preferred
  stock, $0.001 par value per share,
  12,000 authorized, issuable in
  series (aggregate liquidation
  preference of $21,998 at December
  31, 1998):
   Series A redeemable convertible
    preferred stock: 2,500 shares
    authorized, 2,500 shares issued
    and outstanding at December 31,
    1997 and 1998 and June 30, 1999
    (none pro forma)..................    6,126     6,746      7,084     $     --
   Series B redeemable convertible
    preferred stock: 4,188 shares
    authorized, 4,188 shares issued
    and outstanding at December 31,
    1997 and 1998 and June 30, 1999
    (none pro forma)..................       --    16,723     17,561           --
 Stockholders' equity (deficit):
   Common stock, $0.001 par value per
    share: 100,000 shares authorized,
    12,940, 12,950, and 12,950 shares
    issued and outstanding at
    December 31, 1997 and 1998 and
    June 30, 1999, respectively
    (200,000 shares authorized and
    21,310 shares outstanding pro
    forma)............................       13        13         13           21
   Additional paid-in capital.........    6,304     8,627     22,563       47,200
   Notes receivable from employees and
    officers..........................       --      (653)    (2,157)      (2,157)
   Deferred stock compensation........       --    (2,766)   (14,427)     (14,427)
   Deficit accumulated during
    development stage.................   (9,707)  (20,417)   (32,784)     (32,784)
                                        -------  --------   --------     --------
 Total stockholders' equity
  (deficit)...........................   (3,390)  (15,196)   (26,792)    $ (2,147)
                                        -------  --------   --------     ========
 Total liabilities and stockholders'
  equity (deficit)....................  $ 4,763  $ 10,811   $  3,096
                                        =======  ========   ========
</TABLE>

                            See accompanying notes.

                                      F-3
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                            STATEMENTS OF OPERATIONS
                    (In thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                           Period from
                                                      Six months ended      inception
                          Year ended December 31,         June 30,       (April 26, 1994)
                          --------------------------  -----------------  through June 30,
                           1996     1997      1998     1998      1999          1999
                                                        (Unaudited)        (Unaudited)

<S>                       <C>      <C>      <C>       <C>      <C>       <C>
Net revenues............  $    --  $    --  $     --  $    --  $     --      $     --
Operating expenses:
  Research and
   development..........    2,387    3,916     5,603    2,458     5,225        18,210
  Sales and marketing...    1,761    1,743     2,722    1,137     2,494         8,850
  General and
   administrative.......    1,739    1,748     1,897      903     1,373         7,449
  Amortization of
   deferred stock
   compensation.........      688      414       858       --     3,451         5,411
                          -------  -------  --------  -------  --------      --------
Operating loss..........   (6,575)  (7,821)  (11,080)  (4,498)  (12,543)      (39,920)
Interest income.........      239      157       380       46       177         1,017
Interest expense........       (3)     (14)      (10)      (3)       (1)         (109)
                          -------  -------  --------  -------  --------      --------
Net loss................   (6,339)  (7,678)  (10,710)  (4,455)  (12,367)      (39,012)
Accretion on redeemable
 convertible preferred
 stock..................       --     (196)   (1,383)    (307)   (1,176)       (2,755)
                          -------  -------  --------  -------  --------      --------
Net loss attributable to
 common stock...........  $(6,339) $(7,874) $(12,093) $(4,762) $(13,543)     $(41,767)
                          =======  =======  ========  =======  ========      ========
Net loss per common
 share (basic and
 diluted)...............  $ (0.51) $ (0.61) $  (0.92) $ (0.37) $  (1.00)
                          =======  =======  ========  =======  ========
Weighted-average shares
 outstanding (basic and
 diluted)...............   12,543   12,966    13,075   13,026    13,486
Unaudited pro forma net
 loss per share (basic
 and diluted)...........                    $  (0.57)          $  (0.57)
                                            ========           ========
Unaudited pro forma
 weighted-average shares
 outstanding (basic and
 diluted)...............                      18,753             21,846
</TABLE>



                            See accompanying notes.

                                      F-4
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

    STATEMENTS OF COMMON STOCK SUBJECT TO RESCISSION, REDEEMABLE CONVERTIBLE
               PREFERRED STOCKAND STOCKHOLDERS' EQUITY (DEFICIT)
                    (In thousands, except per share amounts)

          Period from inception (April 26, 1994) through June 30, 1999

<TABLE>
<CAPTION>
                                 Redeemable
                  Common Stock   Convertible                                                          Deficit
                   Subject to     Preferred                                                Notes    Accumulated
                   Rescission       Stock        LLC Units      Common Stock  Additional Receivable During the
                  ------------- ------------- ----------------  -------------  Paid-In      From    Development   Deferred
                  Shares Amount Shares Amount  Units   Amount   Shares Amount  Capital   Employees     Stage    Compensation
<S>               <C>    <C>    <C>    <C>    <C>      <C>      <C>    <C>    <C>        <C>        <C>         <C>
Initial capital
contribution....    --    $--     --    $ --   11,063  $   210      --  $--     $   --      $ --      $    --     $     --
Issuance of
units at $0.05
per share for
services........    --     --     --      --      225       10      --   --         --        --           --           --
Net loss........    --     --     --      --       --       --      --   --         --        --         (572)          --
                   ---    ---    ---    ----  -------  -------  ------  ---     ------      ----      -------     --------
Balance at
December 31,
1994............    --     --     --      --   11,288      220      --   --         --        --         (572)          --
Redemption of
units...........    --     --     --      --   (1,131)  (5,400)     --   --         --        --           --           --
Issuance of
units to
investors at
$4.76 per unit
for cash, net of
issuance costs
of $56, and
conversion of
notes...........    --     --     --      --    1,613    7,624      --   --         --        --           --           --
Issuance of
units for
services at
$4.80 per unit..    --     --     --      --       19       90      --   --         --        --           --           --
Deferred
compensation
related to
restricted unit
grants..........    --     --     --      --       --       60      --   --         --        --           --         (60)
Amortization of
deferred
compensation....    --     --     --      --       --       --      --   --         --        --           --           30
Net loss........    --     --     --      --       --       --      --   --         --        --       (1,346)          --
                   ---    ---    ---    ----  -------  -------  ------  ---     ------      ----      -------     --------
Balance at
December 31,
1995............    --     --     --      --   11,789    2,594      --   --         --        --       (1,918)         (30)
Issuance of
units at $8.00
per unit for
cash to
investors in May
1996, net of
issuance costs
of $25..........    --     --     --      --    1,125    8,975      --   --         --        --           --           --
Issuance of
units for
services to
consultants at
$8.00 per unit
during 1996.....    --     --     --      --       13      100      --   --         --        --           --           --
Conversion of
Post N Mail
units into E-
Stamp common
stock and merger
of Post N Mail
into E-Stamp....    --     --     --      --  (12,927) (11,669) 12,927   13      5,428        --        6,228           --
Exercise of
stock options
for cash by
employees during
1996............    19     31     --      --       --       --      --   --         --        --           --           --
Deferred
compensation
related to
restricted
common stock
grants and stock
options.........    --     --     --      --       --       --      --   --      1,072        --           --      (1,072)
Stock issuance
and amortization
of deferred
compensation....    --     --     --      --       --       --      13   --         --        --           --          688
Net loss........    --     --     --      --       --       --      --   --         --        --       (6,339)          --
                   ---    ---    ---    ----  -------  -------  ------  ---     ------      ----      -------     --------
Balance at
December 31,
1996............    19    $31     --    $ --       --  $    --  12,940  $13     $6,500      $ --      $(2,029)    $   (414)
<CAPTION>
                      Total
                  Stockholders'
                     Equity
                    (Deficit)
<S>               <C>
Initial capital
contribution....     $   210
Issuance of
units at $0.05
per share for
services........          10
Net loss........        (572)
                  -------------
Balance at
December 31,
1994............        (352)
Redemption of
units...........      (5,400)
Issuance of
units to
investors at
$4.76 per unit
for cash, net of
issuance costs
of $56, and
conversion of
notes...........       7,624
Issuance of
units for
services at
$4.80 per unit..          90
Deferred
compensation
related to
restricted unit
grants..........          --
Amortization of
deferred
compensation....          30
Net loss........      (1,346)
                  -------------
Balance at
December 31,
1995............         646
Issuance of
units at $8.00
per unit for
cash to
investors in May
1996, net of
issuance costs
of $25..........       8,975
Issuance of
units for
services to
consultants at
$8.00 per unit
during 1996.....         100
Conversion of
Post N Mail
units into E-
Stamp common
stock and merger
of Post N Mail
into E-Stamp....          --
Exercise of
stock options
for cash by
employees during
1996............          --
Deferred
compensation
related to
restricted
common stock
grants and stock
options.........          --
Stock issuance
and amortization
of deferred
compensation....         688
Net loss........      (6,339)
                  -------------
Balance at
December 31,
1996............     $ 4,070
</TABLE>

                            See accompanying notes.

                                      F-5
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

    STATEMENTS OF COMMON STOCK SUBJECT TO RESCISSION, REDEEMABLE CONVERTIBLE
         PREFERRED STOCKAND STOCKHOLDERS' EQUITY (DEFICIT) (Continued)
                    (In thousands, except per share amounts)

       Period from inception (April 26, 1994) through June 30, 1999

<TABLE>
<CAPTION>
                                   Reedemable
                  Common Stock    Convertible                                                      Deficit
                   Subject to      Preferred                                            Notes    Accumulated
                   Rescission        Stock       LLC Units   Common Stock  Additional Receivable During the
                  -------------- -------------- ------------ -------------  Paid-In      From    Development   Deferred
                  Shares  Amount Shares Amount  Units Amount Shares Amount  Capital   Employees     Stage    Compensation
<S>               <C>     <C>    <C>    <C>     <C>   <C>    <C>    <C>    <C>        <C>        <C>         <C>
Issuance of
Series A
redeemable
convertible
preferred stock
for cash to
investors at
$2.40 per share
in September
1997, net of
issuance costs
of $70..........     --    $ --  2,500  $ 5,930   --   $ --      --  $ --    $   --     $  --     $     --     $    --
Issuance of
common stock for
services to
consultants at
$8.00 per share
between
September and
December 1997...     22     175     --       --   --     --      --    --        --        --           --          --
Exercise of
stock options
for cash by
employees during
1997............     27      46     --       --   --     --      --    --        --        --           --          --
Amortization of
deferred
compensation....     --      --     --       --   --     --      --    --        --        --           --         414
Accretion on
redeemable
convertible
preferred
stock...........     --      --     --      196   --     --      --    --      (196)       --           --          --
Net loss........     --      --     --       --   --     --      --    --        --        --       (7,678)         --
                  -----    ----  -----  -------  ---   ----  ------  ----    ------     -----     --------     -------
Balance at
December 31,
1997............     68     252  2,500    6,126   --     --  12,940    13     6,304        --       (9,707)         --
Issuance of
Series B
redeemable
convertible
preferred stock
to investors at
$3.82 per share
for cash in July
1998, net of
issuance costs
of $40..........     --      --  4,188   15,960   --     --      --    --        --        --           --          --
Issuance of
notes receivable
from employees
for exercise of
stock options...  1,738     653     --       --   --     --      --    --        --     (653)           --          --
Issuance of
common stock for
services to
consultants at
$8.00 per share
between January
and June 1998...     --      --     --       --   --     --      10    --        82        --           --          --
Exercise of
stock options
for cash by
employees during
1998............    178      70     --       --   --     --      --    --        --        --           --          --
Shares
repurchased from
employees upon
termination at a
price of $0.40
per share in
September 1998..    (10)     (4)    --       --   --     --      --    --        --        --           --          --
Deferred stock
compensation....     --      --     --       --   --     --      --    --     3,624        --           --      (3,624)
Amortization of
deferred
compensation....     --      --     --       --   --     --      --    --        --        --           --         858
Accretion on
redeemable
convertible
preferred
stock...........     --      --     --    1,383   --     --      --    --    (1,383)       --           --          --
Net loss........     --      --     --       --   --     --      --    --        --        --      (10,710)         --
                  -----    ----  -----  -------  ---   ----  ------  ----    ------     -----     --------     -------
Balance at
December 31,
1998 ...........  1,974    $971  6,688  $23,469   --   $ --  12,950  $ 13    $8,627     $(653)    $(20,417)    $(2,766)
<CAPTION>
                      Total
                  Stockholders'
                     Equity
                    (Deficit)
<S>               <C>
Issuance of
Series A
redeemable
convertible
preferred stock
for cash to
investors at
$2.40 per share
in September
1997, net of
issuance costs
of $70..........    $     --
Issuance of
common stock for
services to
consultants at
$8.00 per share
between
September and
December 1997...          --
Exercise of
stock options
for cash by
employees during
1997............          --
Amortization of
deferred
compensation....         414
Accretion on
redeemable
convertible
preferred
stock...........        (196)
Net loss........      (7,678)
                  -------------
Balance at
December 31,
1997............      (3,390)
Issuance of
Series B
redeemable
convertible
preferred stock
to investors at
$3.82 per share
for cash in July
1998, net of
issuance costs
of $40..........          --
Issuance of
notes receivable
from employees
for exercise of
stock options...        (653)
Issuance of
common stock for
services to
consultants at
$8.00 per share
between January
and June 1998...          82
Exercise of
stock options
for cash by
employees during
1998............          --
Shares
repurchased from
employees upon
termination at a
price of $0.40
per share in
September 1998..          --
Deferred stock
compensation....          --
Amortization of
deferred
compensation....         858
Accretion on
redeemable
convertible
preferred
stock...........      (1,383)
Net loss........     (10,710)
                  -------------
Balance at
December 31,
1998 ...........    $(15,196)
</TABLE>

                            See accompanying notes.

                                      F-6
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

    STATEMENTS OF COMMON STOCK SUBJECT TO RESCISSION REDEEMABLE CONVERTIBLE
         PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (Continued)
                    (In thousands, except per share amounts)

       Period from inception (April 26, 1994) through June 30, 1999

<TABLE>
<CAPTION>
                                    Redeemable
                  Common Stock     Convertible                                                      Deficit
                   Subject to       Preferred                                            Notes    Accumulated
                   Rescission         Stock       LLC Units   Common Stock  Additional Receivable During the
                  --------------  -------------- ------------ -------------  Paid-In      From    Development   Deferred
                  Shares  Amount  Shares Amount  Units Amount Shares Amount  Capital   Employees     Stage    Compensation
<S>               <C>     <C>     <C>    <C>     <C>   <C>    <C>    <C>    <C>        <C>        <C>         <C>
Exercise of
stock options
for cash by
employees during
1999
(unaudited).....     63   $   24    --   $   --   --   $ --      --  $ --    $   --     $   --     $    --      $    --
Issuance of
notes receivable
from employees
for exercise of
stock options
(unaudited).....  2,217    1,668    --       --   --     --      --    --        --      (1,668)        --           --
Shares
repurchased from
employee upon
termination at
$0.40 per share
in March 1999
(unaudited).....   (410)    (164)   --       --   --     --      --    --        --         164         --           --
Deferred stock
compensation
(unaudited).....    --       --     --       --   --     --      --    --     15,112        --          --       (15,112)
Amortization of
deferred
compensation
(unaudited).....    --       --     --       --   --     --      --    --        --         --          --         3,451
Accretion on
redeemable
convertible
preferred stock
(unaudited).....    --       --     --     1,176  --     --      --    --     (1,176)       --          --           --
Net loss
(unaudited).....    --       --     --       --   --     --      --    --        --         --      (12,367)         --
                  -----   ------  -----  -------  ---  -----  ------ -----   -------    -------    --------     --------
Balance at June
30, 1999
(unaudited).....  3,844   $2,499  6,688  $24,645  --   $ --   12,950 $  13   $22,563    $(2,157)   $(32,784)    $(14,427)
                  =====   ======  =====  =======  ===  =====  ====== =====   =======    =======    ========     ========
<CAPTION>
                      Total
                  Stockholders'
                     Equity
                    (Deficit)
<S>               <C>
Exercise of
stock options
for cash by
employees during
1999
(unaudited).....    $    --
Issuance of
notes receivable
from employees
for exercise of
stock options
(unaudited).....      (1,668)
Shares
repurchased from
employee upon
termination at
$0.40 per share
in March 1999
(unaudited).....         164
Deferred stock
compensation
(unaudited).....         --
Amortization of
deferred
compensation
(unaudited).....       3,451
Accretion on
redeemable
convertible
preferred stock
(unaudited).....      (1,176)
Net loss
(unaudited).....     (12,367)
                  -------------
Balance at June
30, 1999
(unaudited).....    $(26,792)
                  =============
</TABLE>


                            See accompanying notes.

                                      F-7
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                            STATEMENTS OF CASH FLOWS
                                 (In thousands)

<TABLE>
<CAPTION>
                                                      Six months ended
                          Year ended December 31,         June 30,       Period from inception
                          --------------------------  -----------------     (April 26, 1994)
                           1996     1997      1998     1998      1999    through June 30, 1999
                                                        (Unaudited)           (Unaudited)
<S>                       <C>      <C>      <C>       <C>      <C>       <C>
Operating activities
Net loss................  $(6,339) $(7,678) $(10,710) $(4,455) $(12,367)       $(39,012)
Adjustments to reconcile
 net loss to net cash
 used in operating
 activities:
 Depreciation and
  amortization..........      163      366       405      222       155           1,156
 Loss on disposal of
  assets................       --       --        65       --        --             180
 Amortization of
  deferred compensation
  expense...............      688      414       858       --     3,451           5,411
 Issuance of common
  stock for services....      100      175        82       --        --             457
 Changes in assets and
  liabilities:
  Note receivable.......      (60)      60        --       --        --              --
  Other assets..........       27      (14)      (88)     (10)     (354)           (498)
  Accounts payable and
   accrued liabilities..      501      957      (172)     (65)    1,189           2,718
                          -------  -------  --------  -------  --------        --------
Net cash used in
 operating activities...   (4,920)  (5,720)   (9,560)  (4,308)   (7,926)        (29,588)
Investing activities
Purchase of property and
 equipment..............     (669)    (119)     (324)    (144)     (387)         (1,881)
Purchase of short-term
 investments............       --       --        --       --        --            (969)
Sale of short-term
 investments............      871       98        --       --        --             969
                          -------  -------  --------  -------  --------        --------
Net cash provided by
 (used in) investing
 activities.............      202      (21)     (324)    (144)     (387)         (1,881)
Financing activities
Repayments of lease
 obligations............      (28)     (34)      (36)     (20)      (12)            (82)
Proceeds from issuance
 of notes payable.......       --       --       700      700        --             700
Repayments of notes
 payable................       --       --      (700)      --        --            (700)
Repayments of notes
 payable to related
 parties................     (540)      --        --       --        --          (5,740)
Proceeds from issuance
 of notes payable to
 related parties........       --       --        --       --        --             521
Net proceeds from
 exercise of stock
 options................       31       46        66       38        24             167
Net proceeds from
 issuance of redeemable
 convertible preferred
 stock..................       --    5,930    15,960       --        --          21,890
Net proceeds from
 issuance of common
 stock..................    8,975       --        --       --        --          16,629
                          -------  -------  --------  -------  --------        --------
Net cash provided by
 financing activities...    8,438    5,942    15,990      718        12          33,385
                          -------  -------  --------  -------  --------        --------
Net increase (decrease)
 in cash and cash
 equivalents............    3,720      201     6,106   (3,734)   (8,301)          1,916
Cash and cash
 equivalents at
 beginning of period....      190    3,910     4,111    4,111    10,217              --
                          -------  -------  --------  -------  --------        --------
Cash and cash
 equivalents at end of
 period.................  $ 3,910  $ 4,111  $ 10,217  $   377  $  1,916        $  1,916
                          =======  =======  ========  =======  ========        ========
Supplemental cash flow
 information
Cash paid for interest..  $     3  $    14  $     10  $     3  $      3        $     88
                          =======  =======  ========  =======  ========        ========
Schedule of non-cash
 financing and investing
 transactions
Issuance of notes
 receivable from
 employees for exercise
 of stock options.......  $    --  $    --  $   (653) $  (653) $ (1,668)       $ (2,321)
                          =======  =======  ========  =======  ========        ========
Common stock repurchased
 from employee upon
 termination by
 forgiveness of notes
 receivable.............  $    --  $    --  $     --  $    --  $    164        $    164
                          =======  =======  ========  =======  ========        ========
Conversion of related
 party notes payable to
 shares.................  $    --  $    --  $     --  $    --  $     --        $    180
                          =======  =======  ========  =======  ========        ========
Redemption of 905 shares
 for related party notes
 payable (Note 3).......  $    --  $    --  $     --  $    --  $     --        $  5,400
                          =======  =======  ========  =======  ========        ========
Assets acquired under
 capital lease
 obligations............  $    --  $    80  $     --  $    --  $     --        $    113
                          =======  =======  ========  =======  ========        ========
</TABLE>

                            See accompanying notes.

                                      F-8
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                         NOTES TO FINANCIAL STATEMENTS

   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

1. Background and Summary of Significant Policies

   E-Stamp Corporation, a Delaware corporation, was formed on August 23, 1996.
Effective September 1, 1996, Post N Mail, L.L.C., formed on April 26, 1994, was
merged (the "Merger") into E-Stamp Corporation (collectively, the "Company" or
"E-Stamp"). Upon completion of the Merger, all of the assets of Post N Mail,
L.L.C. were acquired by E-Stamp Corporation. The Merger was accounted for as a
combination of entities under common control. Each unit of Post N Mail, L.L.C.
ownership received 5,000 shares of E-Stamp common stock. The financial
statements have been presented to reflect the Merger for all periods presented.
The Company is a development stage company which has devoted substantially all
of its efforts to recruiting personnel to conduct research and product
development and sales and marketing and has not yet generated revenues from the
sale of products.

   The Company has incurred significant losses since inception. Its activities
to date have been financed primarily through private placements of equity
securities. The Company may seek to raise additional capital through the
issuance of debt or equity securities. However, there can be no assurance that
the Company will be able to obtain additional financing on acceptable terms, if
at all.

Nature of Operations

   The Company has developed technology that allows users to apply digital
postage to envelopes, mailing labels, and documents from their personal
computers. This technology, termed the E-Stamp Internet postage solution,
allows authorized users to purchase postage via the Internet and subsequently
print postage from personal computers onto envelopes, mailing labels, and
documents using standard laser and inkjet printers. The Internet postage
solution is designed to print a postmark indicia that can be used as a
replacement for other current forms of postage, including stamps and today's
postmarks generated by postage metering devices. The information generated by
the Internet postage solution will be read by the U.S. Postal Service during
mail processing and allow for routing to intended recipients.

Revenue Recognition

   Through June 30, 1999, the Company had not generated any revenues. The
Company anticipates that it will generate revenue from software license fees,
postage convenience fees and sale of postage supplies.

   Software license fees are amounts paid by end-users and resellers for a
perpetual license to the Company's software. The Company's software package
allows the end-user to apply for a USPS license. When the Company is notified
that the USPS has approved the license, the Company ships a secure internet
postage device, necessary for the use of the Company's software, to the end-
user. Revenues from software license fees are recognized in accordance with
AICPA Statement of Position 97-2, "Software Revenue Recognition," and Statement
of Position 98-4, "Deferral of the Effective Date of a Provision of SOP 97-2,
Software Revenue Recognition." Revenues from software license fees are
recognized when delivery of the secure internet postage device and the software
are complete, when persuasive evidence of an arrangement exists, collection is
probable, the fee is fixed and determinable and no significant obligations
remain.

   Postage convenience fees are amounts paid by end-users for the delivery of
postage by the Company to the end-user. The convenience fees are based on the
amount of postage ordered by the end-user. Revenues from postage convenience
fees are recognized when the postage is downloaded into the secure postage
hardware device.

   The Company anticipates that it will operate an Internet-based postal store
where end-users may purchase various postal supplies. The Company will
recognize revenues related to the postage supplies when the supplies are
delivered.

                                      F-9
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                  NOTES TO FINANCIAL STATEMENTS--(Continued)
  (Information for the six months ended June 30, 1998 and 1999 is unaudited)

1. Background and Summary of Significant Policies (continued)
Revenue Recognition (continued)

   The Company will provide an allowance for estimated returns upon the
recognition of the related revenue.

Cash and Cash Equivalents

   The Company considers all highly liquid investments with a remaining
maturity of three months or less when purchased to be cash equivalents. The
Company's cash equivalents were composed of government securities as of
December 31, 1998 and of money market mutual funds and government securities
as of December 31, 1997. The Company's cash and cash equivalents are carried
at cost which approximates market.

Property and Equipment

   Property and equipment are recorded at cost. Additions, improvements, and
renewals that significantly add to the asset value or extend the life of the
asset are capitalized. Expenditures for maintenance and repairs are expensed
as costs are incurred.

   Depreciation and amortization, for financial reporting purposes, are
provided on the straight-line method based upon the estimated useful lives as
follows:

<TABLE>
     <S>                                                       <C>
     Computer and other equipment............................. 3 years
     Furniture and fixtures................................... 3 years
     Leasehold improvements................................... Life of the lease
</TABLE>

   In accordance with Statement of Financial Accounting Standard No. 121,
"Accounting for the Impairment of Long-Lived Assets to be Disposed Of" ("SFAS
No. 121"), the Company records impairment losses on long-lived assets used in
operations when events or circumstances indicate that the carrying amount of
the asset exceeds its fair value. If there is impairment in the future, the
Company will measure the amount of the loss based on discounted expected
future cash flows from the impaired assets. The cash flow calculations would
be based on management's best estimates, using appropriate assumptions and
projections at the time. Through June 30, 1999 the Company has not recorded
any such impairment losses.

Research and Development

   Research and development costs are expensed as they are incurred. Statement
of Financial Accounting Standards No. 86, "Accounting for the Costs of
Computer Software To Be Sold, Leased, or Otherwise Marketed" (FAS 86),
requires capitalization of certain software development costs subsequent to
the establishment of technological feasibility. Based on the Company's product
development process, technological feasibility is established upon completion
of all phases of the detailed product design necessary to establish that the
product can be manufactured to meet all design specifications. Through June
30, 1999, technological feasibility for the Company's primary product was not
established and, therefore, all software research and development costs were
expensed as incurred.

Advertising Costs

   The Company expenses the costs of advertising as incurred. Advertising
expense consists principally of advertising contracts in which the Company is
guaranteed a minimum number of impressions (a view of an advertisement by a
consumer) for a fixed fee. The fees are recorded as advertising expense
ratably over the

                                     F-10
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

1. Background and Summary of Significant Policies (continued)
Advertising Costs (continued)

term of the agreements. To the extent that impression deliveries are falling
short of the guarantees, the Company defers recognition of the corresponding
advertising expense until the impressions are delivered. The Company also pays
royalties (see Note 4) for the promotion of its product. Such royalties are
recorded as advertising expense as the royalties are earned. Advertising
expense was $117,000 for the year ended December 31, 1998. No advertising
expense was recorded for the years ended December 31, 1996 and 1997.

Income Taxes

   The Company computes and records income tax in accordance with Statement of
Financial Accounting Standards No. 109, "Accounting for Income Taxes" ("FAS
109"). Under FAS 109, the liability method is used to calculate deferred taxes.

Stock-Based Compensation

   In accordance with the provisions of Statement of Financial Accounting
Standards No. 123, "Accounting for Stock-Based Compensation" ("FAS 123"), which
the Company adopted in 1996, the Company has elected to follow Accounting
Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees"
("APB Opinion No. 25"), and related interpretations in accounting for stock
options. Under APB Opinion No. 25, if the exercise price of the Company's
employee and director stock options equals or exceeds the fair value of the
underlying stock on the date of grant, no compensation expense is recognized.
Options granted to consultants are accounted for using the Black-Scholes method
prescribed by FAS 123 in accordance with Emerging Issues Task Force consensus
No. 96-18 and the assumptions used for stock-based awards to employees (see
Note 4) except that a volatility of 100% was used. (See Note 3 for pro forma
disclosures of stock-based compensation pursuant to FAS 123.) Any deferred
stock compensation is amortized over the vesting period of the individual
options, generally four years, using the graded vesting method. The graded
vesting method provides for vesting of portions of the overall award at
different dates and results in higher vesting in earlier years than straight-
line vesting.

Use of Estimates

   The Company's management makes estimates and assumptions in the preparation
of its financial statements in conformity with generally accepted accounting
principles. These estimates and assumptions may affect the reported amounts of
assets and liabilities, the disclosure of contingent assets and liabilities as
of the date of the financial statements, and the reported amounts of expenses
during the respective reporting periods. Actual results could differ from those
estimates.

Concentrations

   The Company relies on one manufacturer for the supply and production of its
Internet postage device. The inability of this manufacturer to fulfill the
Company's supply requirements could negatively impact future results.

Effect of New Accounting Standards

   Effective January 1, 1998, the Company adopted Statement of Financial
Accounting Standards No. 130, "Reporting for Comprehensive Income," ("SFAS
130"). SFAS 130 requires disclosures of components of

                                      F-11
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

1. Background and Summary of Significant Policies (continued)
Effect of New Accounting Standards (continued)

non-stockholder changes in equity in interim periods and additional disclosures
of components of non-stockholder changes in equity on an annual basis. Adoption
of SFAS 130 had no impact on the Company's results of operations or financial
position.

   In June 1997, the Financial Accounting Standards Board ("FASB") issued SFAS
No. 131, "Disclosures about Segments of an Enterprise and Related Information,"
("SFAS 131"). The Company adopted SFAS 131 effective January 1, 1998. The
adoption of this standard did not have a material effect on the Company's
financial statement disclosures as the Company operates in a single segment.

   In June 1998, the FASB issued SFAS No. 133, "Accounting for Derivative
Instruments and Hedging Activities," ("SFAS 133"). The Company is required to
adopt SFAS 133 for the year ending December 31, 2000. SFAS 133 establishes
methods of accounting for derivative financial instruments and hedging
activities related to those instruments as well as other hedging activities.
Because the Company currently holds no derivative financial instruments and
does not currently engage in hedging activities, adoption of SFAS 133 is
expected to have no material impact on the Company's financial condition or
results of operations.

   In March 1998, the AICPA issued Statement of Position 98-1, "Accounting for
the Costs of Computer Software Developed or Obtained for Internal Use" ("SOP
98-1"). SOP 98-1 requires that entities capitalize certain costs related to
internal use software once certain criteria have been met. The Company adopted
the provisions of SOP 98-1 on January 1, 1999. Through June 30, 1999, the
Company has not capitalized any costs related to internal use software.

   The Company will adopt AICPA Statement of Position 97-2, "Software Revenue
Recognition" ("SOP 97-2"), and Statement of Position 98-4, "Deferral of the
Effective Date of a Provision of SOP 97-2, Software Revenue Recognition" ("SOP
98-4") upon its first product revenue transactions. SOP 97-2 and SOP 98-4
provide guidance for recognizing revenue on software transactions and supersede
SOP 91-1, "Software Revenue Recognition." As no revenues have been recognized,
the adoption of SOP 97-2 and SOP 98-4 did not have any impact on the Company's
financial results through December 31, 1998. However, full implementation
guidelines for this standard have not yet been issued. Once available, the
planned revenue accounting practices may need to change and such changes could
affect the Company's future revenues and results of operations. In December
1998, the AICPA issued Statement of Position 98-9, "Modification of SOP 97-2,
Software Revenue Recognition, With Respect to Certain Transactions" ("SOP 98-
9"). SOP 98-9 amends SOP 98-4 to extend the deferral of the application of
certain passages of SOP 97-2 provided by SOP 98-4 through fiscal years
beginning on or before March 15, 1999. All other provisions of SOP 98-9 are
effective for transactions entered into in fiscal years beginning after March
15, 1999. E-Stamp has not yet determined the effect of the final adoption of
SOP 98-9 on its future revenues and results of operations.

Reclassifications

   Certain prior-year amounts have been reclassified to conform with the
current year's presentation.

Unaudited Financial Statements

   According to management, the accompanying unaudited financial statements for
the six months ended June 30, 1998 and 1999 and for the period from inception
(April 26, 1994) to June 30, 1999 have been

                                      F-12
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

1. Background and Summary of Significant Policies (continued)
Unaudited Financial Statements (continued)

prepared on substantially the same basis as the audited financial statements
and include all adjustments (consisting of normal recurring adjustments)
considered necessary for a fair presentation of the financial information set
forth therein.

Unaudited Pro Forma Information

   If the offering contemplated by this prospectus is consummated, the Series A
and B redeemable convertible preferred stock outstanding as of the closing date
will be converted into shares of the Company's common stock. The pro forma
stockholders' equity as of June 30, 1999 reflects conversion of the outstanding
preferred stock into 8,360,000 shares of common stock. Pro forma net loss per
share is computed as if the outstanding preferred stock had been converted into
common stock on the date of issuance.

2. Line of Credit

   On October 11, 1997, the Company entered into a Loan and Security Agreement
with a bank which allows for a $1,000,000 line of credit to be used for general
business purposes. An amendment dated September 21, 1998 increased the line of
credit to $1,250,000. The Loan and Security Agreement, which expires
September 30, 1999, grants the bank a security interest in all the assets of
the Company except the intellectual property. As of December 31, 1998 and June
30, 1999, no amounts were outstanding under this arrangement; however, a
$35,000 letter of credit required for the Company's California office lease was
secured by this credit facility, leaving the balance of the line of credit of
$1,215,000 available for other purposes. At June 30, 1999, $143,000 was
outstanding on the letter of credit and $1,107,000 was available.

3. Redeemable Convertible Preferred Stock

   As of December 31, 1998, the Company is authorized to issue 12,000,000
shares of preferred stock in series. Rights and preferences of each series of
preferred stock are to be determined by the Board of Directors. As of December
31, 1998, 2,500,000 and 4,188,000 shares have been designated as Series A and B
redeemable convertible preferred stock, respectively.

   The Series A and B redeemable convertible preferred stock carries an 8%,
noncumulative dividend, payable at the discretion of the Board of Directors.
Additionally, each outstanding share of Series A and B redeemable convertible
preferred stock is convertible into 1.25 shares of common stock (i) at the
option of the holder, (ii) upon the closing of a public offering, as defined,
or (iii) upon the consent of a majority of holders of the Series A and B
redeemable convertible preferred stock. The Company has reserved 3,125,000 and
5,235,000 shares of common stock for the conversion of the Series A and B
redeemable convertible preferred stock, respectively.

   The holders of Series A and B redeemable convertible preferred stock are
entitled to receive noncumulative dividends at the rate of $0.192 and $0.3056
per share, respectively, if declared by the Board of Directors. These dividends
are in preference to any declaration or payment of and dividend on common stock
of the Company. No dividends have been declared from inception (April 26, 1994)
through December 31, 1998.

                                      F-13
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

3. Redeemable Convertible Preferred Stock (continued)


   Upon liquidation of the Company, the Series A and B redeemable convertible
preferred stockholders are entitled to a liquidation preference equal to the
original issuance price, plus any declared unpaid dividends, which is superior
to the claim of common stockholders.

   The holders of Series A and B redeemable convertible preferred stock are
entitled to one vote for each share of common stock into which such convertible
preferred stock could be converted.

   At any time after September 3, 2001 but not later than September 3, 2003, a
majority of the holders of Series A redeemable convertible preferred stock can
require the Company to redeem the outstanding Series A redeemable convertible
preferred stock at the redemption price. The redemption price is equal to the
original issuance price of the Series A redeemable convertible preferred stock
plus a 10% compound annual rate of return. The carrying amount of Series A
redeemable convertible preferred stock is being increased by periodic
accretions so that its carrying amount will equal the redemption amount at the
redemption date.

   At any time after July 7, 2002 but not later than July 7, 2004, a majority
of the holders of Series B redeemable convertible preferred stock can require
the Company to redeem the outstanding Series B convertible preferred stock at
the redemption price. The redemption price is equal to the original issuance
price of the Series B redeemable convertible preferred stock plus a 10%
compound annual rate of return. The carrying amount of Series B redeemable
convertible preferred stock is being increased by periodic accretions so that
its carrying amount will equal the redemption amount at the redemption date.

4. Stockholders' Equity

Stock Option Plans

 Stock Option and Restricted Stock Plan

   Effective September 1996, the Company established the 1996 Stock Option and
Restricted Stock Plan (the "Employee Plan"). The Employee Plan expires in
August 2006 and provides for the grant of incentive stock options, nonstatutory
stock options, and restricted stock to employees and consultants of the
Company. An amendment increasing the number of shares thereunder from 2,500,000
to 3,437,500 was approved by the Board of Directors on June 26, 1998. The
Employee Plan is administered by a committee of the Board of Directors. This
committee has the authority to determine the employees and consultants to whom
awards will be made, the amount of the awards, and the other terms and
conditions of the awards. Stock options are limited to ten-year terms, and
options granted through December 31, 1998 generally vest at the rate of 25%
upon the first anniversary of the grant and 6.25% each quarter thereafter. The
exercise price for stock options may not be less than the fair value of the
shares on the date of grant for incentive stock options and is subject to the
discretion of the committee for nonstatutory stock options. Restricted stock
may be granted at no additional cost to recipients. Compensation expense, if
any, equal to the fair value of the restricted stock or stock options granted
in excess of the purchase or exercise price, is recognized over the related
vesting period. A total of 3,437,500 shares of common stock are currently
reserved for issuance pursuant to the Employee Plan. As of December 31, 1998,
options to purchase 1,259,241 shares of common stock at a weighted-average
exercise price of $0.60 per share were outstanding of which 1,037,163 were
vested, and 203,906 shares of common stock remained available for future grants
under the Employee Plan.


                                      F-14
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

4. Stockholders' Equity (continued)
Stock Option Plans (continued)

 Nonemployee Directors' Plan

   Also in September 1996, the Company established the 1996 Nonemployee
Director Stock Option Plan (the "Director Plan") which authorizes the issuance
of up to 125,000 shares of common stock. The Director Plan expires in August
2006. The Director Plan is a nondiscretionary stock option plan for nonemployee
directors of the Company, which generally provides for the grant of stock
options for 10,000 shares upon election as a nonemployee director and an
additional grant of stock options for 3,000 shares as of April 1 of each year.
The options are limited to a ten-year term, vest at the rate of 50% per year,
and have an exercise price equal to the fair value of the shares on the date of
grant. A total of 125,000 shares of common stock are currently reserved for
issuance pursuant to the Director Plan. As of December 31, 1998, options to
purchase 19,063 shares of common stock at a weighted-average exercise price of
$0.40 per share were outstanding of which 13,906 were vested, and 105,937
shares of common stock remained available for future grants under the Director
Plan.

   The following is a summary of the combined option transactions under the
Employee Plan and Director Plan for the years ended December 31, 1997 and 1998.
<TABLE>
<CAPTION>
                                                                   Weighted-
                                                       Number of    Average
                                                        Options  Exercise Price
                                                        (In thousands, except
                                                          per share amounts)
   <S>                                                 <C>       <C>
   Options outstanding at December 31, 1996...........     824       $4.66
     Granted..........................................   1,518        0.57
     Exercised........................................     (29)       1.60
     Canceled.........................................    (224)       5.79
                                                        ------
   Options outstanding at December 31, 1997...........   2,089        0.50
     Granted..........................................   1,360        0.55
     Exercised........................................  (1,916)       0.42
     Canceled.........................................    (255)       0.41
                                                        ------
   Options outstanding at December 31, 1998...........   1,278        0.60
     Granted (unaudited)..............................   2,870        0.78
     Exercised (unaudited)............................  (2,280)       0.74
     Canceled (unaudited).............................    (583)       0.72
                                                        ------
   Options outstanding at June 30, 1999 (unaudited)...   1,285        0.72
                                                        ======
   Exercisable at December 31, 1998...................   1,053
                                                        ======
</TABLE>

<TABLE>
<CAPTION>
                                       Options Outstanding and Exercisable
                                  ----------------------------------------------
                                     Options
                                  Outstanding at Weighted-Average   Weighted-
                                   December 31,     Remaining        Average
     Range of Exercise Prices          1998      Contractual Life Exercise Price
                                  (In thousands)    (In years)
     <S>                          <C>            <C>              <C>
       $0.04-$0.20...............        31            5.23           $0.14
       $0.40-$0.40...............       379            7.65            0.40
       $0.64-$0.64...............       855            9.82            0.64
       $4.80-$5.28...............        13            1.00            4.80
                                      -----            ----
                                      1,278            8.98
                                      =====            ====
</TABLE>


                                       F-15
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

4. Stockholders' Equity (continued)

Stock Option Plans (continued)

 Stock-Based Compensation

   During 1995, the Financial Accounting Standards Board adopted Statement of
Financial Accounting Standards No. 123, "Accounting for Stock-Based
Compensation" ("FAS 123"), which became effective for the Company's 1996 fiscal
year. FAS 123 requires the Company to disclose the pro forma effect of the
method of accounting prescribed in FAS 123, which would generally require the
Company to record compensation expense equal to the valuation of a stock option
on the grant date.

   The fair value of the Company's stock-based awards to employees was
estimated using the minimum value method and assuming no expected dividends and
the following weighted average assumptions:

<TABLE>
<CAPTION>
                                                                Years ended
                                                                December 31,
                                                               ----------------
                                                               1996  1997  1998
   <S>                                                         <C>   <C>   <C>
   Expected volatility........................................  N/A   N/A   N/A
   Expected life of options in years..........................  5.5   5.5   4.0
   Risk-free interest rate....................................  6.0%  6.0%  5.0%
   Expected dividend yield.................................... 0.00% 0.00% 0.00%
</TABLE>

   For pro forma purposes, the estimated minimum value of the Company's stock-
based awards to employees is amortized over the options' vesting period. If the
Company had elected to recognize compensation cost based on the fair value of
the options granted at grant date as prescribed by FAS 123, net loss and net
loss per share would have increased to the pro forma amounts indicated in the
table below (in thousands except per share amounts):

<TABLE>
<CAPTION>
                                                   Years ended December 31,
                                                   --------------------------
                                                    1996     1997      1998
   <S>                                             <C>      <C>      <C>
   Net loss attributable to common stockholders:
     As reported.................................. $(6,339) $(7,874) $(12,093)
                                                   =======  =======  ========
     Pro forma.................................... $(7,146) $(8,831) $(12,643)
                                                   =======  =======  ========
   Net loss per share (basic and diluted):
     As reported.................................. $ (0.51) $ (0.61) $  (0.92)
                                                   =======  =======  ========
     Pro forma.................................... $ (0.57) $ (0.68) $  (0.97)
                                                   =======  =======  ========
</TABLE>

   The weighted-average fair value of options granted in fiscal 1997 and 1998
was $0.19 and $0.14, respectively.

   In 1996, the Company granted equity awards of common stock to certain
employees. Restrictions, as determined by management, lapse from one year to
four years after the grant date. Upon grant, deferred compensation of
approximately $1.1 million was charged to stockholders' equity and is being
amortized to expense over the periods until the restrictions lapse. In
connection with these restricted shares, amortization charged to expense in
1996 and 1997 was $688,000 and $414,000, respectively, and $1,132,000 for the
period from inception to December 31, 1998.

                                      F-16
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

4. Stockholders' Equity (continued)

   The Company has recorded additional deferred stock compensation of
approximately $3,624,000 during the year ended December 31, 1998 and
$15,112,000 during the six months ended June 30, 1999 representing the
difference between the exercise price and the deemed fair value, for financial
reporting purposes, of the Company's common stock on the grant date for certain
of the Company's stock options granted to officers and employees. In the
absence of a public market for the Company's common stock, the deemed fair
value was determined by the Company's Board of Directors and was based on the
price per share of sales of equity securities to third parties. These amounts
are being amortized by charges to operations over the vesting periods of the
individual stock options using a graded vesting method. Such amortization
expense amounted to approximately $858,000 for the year ended December 31, 1998
and approximately $3,451,000 for the six months ended June 30, 1999.

 Stock Subject to Rescission

   Shares issued and options grants made under the Company's 1996 Employee
Plan, 1996 Director Plan and 1999 Stock Plan may not have qualified for
exemption from registration or qualification under federal and state securities
laws and therefore may be subject to rescission. As discussed in Note 10, the
Company plans on commencing a rescission offer for these shares and options. If
a rescission offer is actually made and if all of the holders of these shares
and options acquired through October 1, 1999 accept the Company's offer, the
Company would be required to make aggregate payments of up to $6.9 million plus
statutory interest.

   The Company has reclassified the amounts paid in for outstanding shares
subject to rescission outside of permanent equity in the accompanying balance
sheets.

 Stock Subject to Repurchase

   As of December 31, 1997 and 1998 the Company had none and 1,751,063 shares
of common stock outstanding which were subject to repurchase, respectively. At
June 30, 1999 the Company had 3,968,538 shares of common stock outstanding
which were subject to repurchase. These shares are the result of the exercise
of unvested stock options by employees in exchange for notes (see Note 8).
These shares will vest over the four-year vesting period of the underlying
exercised stock options. The right to repurchase these shares is at the sole
discretion of the Company.

5. Marketing and Distribution Agreements

Compaq Software Alliance Agreement

   In July 1998, the Company entered into a three year Software Alliance
Agreement ("Alliance Agreement") with Compaq Computer Corporation ("Compaq").
Under this agreement, Compaq will market our Internet postage solution as part
of their online services and, in exchange, the Company agreed to pay Compaq
royalties.

Strategic Marketing Agreement

   In November, 1998, the Company entered into a strategic marketing agreement
with an Internet service provider (the "Provider") for the promotion of the
Company's internet postage service. The Provider has agreed to deliver a
minimum number of impressions over the approximate 15 month term of the
agreement, commencing on the date the Company receives approval for Phase III
beta testing from the USPS. In exchange for these promotional services, the
Company has agreed to pay the Provider approximately $1.3 million.


                                      F-17
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

6. Income Taxes

   As of December 31, 1998, the Company had federal and state net operating
loss carryforwards of approximately $7,100,000 and $5,700,000 respectively. The
net operating loss carryforwards will expire at various dates beginning in 2004
through 2018, if not utilized.

   Utilization of the net operating losses may be subject to a substantial
annual limitation due to the ownership change limitations provided by the
Internal Revenue Code and similar state provisions. The annual limitation may
result in the expiration of the net operating loss carryforwards before
utilization.

   Significant components of the Company's deferred tax assets and liabilities
for federal and state income taxes are as follows:

<TABLE>
<CAPTION>
                                                                December 31,
                                                              -----------------
                                                               1997      1998
                                                               (In thousands)
   <S>                                                        <C>      <C>
   Deferred tax assets:
   Net operating loss carryforwards.......................... $   900  $  2,800
   Capitalized research and development......................   2,400     4,300
   Capitalized start-up costs................................   2,100     1,700
   Deferred compensation.....................................     400       600
   Other.....................................................     600       800
                                                              -------  --------
   Total deferred tax assets.................................   6,400    10,200
   Valuation allowance.......................................  (6,400)  (10,200)
                                                              -------  --------
   Net deferred tax assets................................... $    --  $     --
                                                              =======  ========
</TABLE>

   FAS 109 provides for the recognition of deferred tax assets if realization
of such assets is more likely than not. Based upon the weight of available
evidence, which includes the Company's historical operating performance and the
reported cumulative net losses in prior years, the Company has provided a full
valuation allowance against its net deferred tax assets.

   The valuation allowance increased by $3,100,000 and $3,800,000 during the
years ended December 31, 1997 and 1998, respectively.

7. Commitments

401(k) Plan

   Effective April 1, 1996, the Company established the E-Stamp Corporation
Benefit Plan (the "Plan"). The Plan provides for a Company match of employee
contributions equal to 50% of employee contributions up to 4% of their
compensation. Employees are eligible to participate in the Plan at the
beginning of the month following the first day of employment. The terms of the
Plan are subject to change as determined by management. The Company made
contributions in 1997 and 1998 of approximately $18,000 and $59,000,
respectively.

                                      F-18
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

7. Commitments (continued)


Leases

   The Company has various operating leases, the terms of which range from 12
to 60 months. The operating leases are primarily for facilities in Houston,
Texas and Palo Alto, California. Rental expenses related to these leases for
the periods ended December 31, 1996, 1997 and 1998 were $188,000, $411,000 and
$554,000, respectively. During 1997, the Company entered into computer lease
agreements classified as capital leases in the accompanying financial
statements.

   In February 1999, the Company entered into a new sublease pertaining to a
new facility at a monthly rent payment of $71,683 effective April 1, 1999. The
sublease term will end on June 30, 2000. The table below includes the rental
payments from this sublease.

Leases (continued)

   The following represents future minimum rental payments under noncancelable
operating leases and capital leases:

<TABLE>
<CAPTION>
                                                               Operating Capital
                                                                (In thousands)
   <S>                                                         <C>       <C>
   For the years ending December 31:
     1999.....................................................  $  943     $31
     2000.....................................................     459       8
     2001.....................................................      --       4
     2002.....................................................      --       1
                                                                ------     ---
   Total minimum lease payments...............................  $1,402      44
                                                                ======
   Less amount representing interest..........................              (6)
                                                                           ---
   Present value of future minimum lease payments.............              38
   Less current portion of capital leases.....................             (27)
                                                                           ---
   Long-term portion of capital leases........................             $11
                                                                           ===
</TABLE>

   Assets capitalized under capital leases totaled approximately $80,000 at
December 31, 1997 and 1998 and are included in computers and furniture and
fixtures. Accumulated amortization related to assets under capital leases
totaled $22,000 and $49,000 at December 31, 1997 and 1998, respectively.

8. Notes Receivable

   On June 12, 1998, the Company received $653,294 of full recourse notes
receivable from employees which bear interest at 6% per annum in consideration
for the exercise of stock options. The interest portion is payable annually or
on or before the 12th day of June, commencing June 12, 1999 and continuing
through June 12, 2003, at which time the entire amount of principal and all
accrued interest then outstanding and remaining unpaid shall become due and
payable in full. The principal is payable in full on the earlier to occur of
June 12, 2003 or 90 days following the termination of employment for any
reason.

   Interest receivable recorded for these notes receivable totaled $21,800 at
December 31, 1998.

                                      F-19
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

9. Net Loss Per Share


   Net loss per share has been computed in accordance with the Statement of
Financial Accounting Standards No. 128, "Earnings Per Share" ("FAS 128"), which
requires disclosure of basic and diluted earnings per share. Basic earnings per
share excludes any dilutive effects of options, shares subject to repurchase,
warrants, and convertible securities. Diluted earnings per share includes the
impact of potentially dilutive securities. The Company's potentially dilutive
securities were antidilutive and therefore were not included in the computation
of weighted-average shares used in computing diluted loss per share. Following
the guidance given by the Securities and Exchange Commission Staff Accounting
Bulletin No. 98, common stock and convertible preferred stock that has been
issued or granted for nominal consideration prior to the anticipated effective
date of the initial public offering date must be included in the calculation of
basic and diluted net loss per common share as if these shares had been
outstanding for all periods presented. To date, the Company has not issued or
granted shares for nominal consideration.


   The following table presents the calculation of basic and diluted and pro
forma basic and diluted net loss per share (in thousands, except per share
data):

<TABLE>
<CAPTION>
                                       Years ended           Six months ended
                                       December 31,              June 30,
                                 --------------------------  -----------------
                                  1996     1997      1998     1998      1999
                                                               (unaudited)
   <S>                           <C>      <C>      <C>       <C>      <C>
   Basic and diluted:
    Net loss..................   $(6,339) $(7,678) $(10,710) $(4,455) $(12,367)
    Accretion on redeemable
     convertible preferred
     stock....................       --      (196)   (1,383)    (307)   (1,176)
                                 -------  -------  --------  -------  --------
    Net loss attributable to
     common stock.............   $(6,339) $(7,874) $(12,093) $(4,762) $(13,543)
                                 =======  =======  ========  =======  ========
    Weighted-average shares of
     common stock
     outstanding..............    12,543   12,966    14,044   13,200    15,404
    Less: weighted-average
     shares subject to
     repurchase...............       --       --       (969)    (174)   (1,918)
                                 -------  -------  --------  -------  --------
    Weighted-average shares
     used in computing basic
     and diluted net loss per
     share....................    12,543   12,966    13,075   13,026    13,486
                                 =======  =======  ========  =======  ========
    Basic and diluted net loss
     per share................   $ (0.51) $ (0.61) $  (0.92) $ (0.37) $  (1.00)
                                 =======  =======  ========  =======  ========
   Pro forma basic and
    diluted:
    Net loss..................                     $(10,710)          $(12,367)
                                                   ========           ========
    Shares used above.........                       13,075             13,486
    Pro forma adjustment to
     reflect weighted effect
     of assumed conversion of
     convertible preferred
     stock (unaudited)........                        5,678              8,360
                                                   --------           --------
    Shares used in computing
     pro forma basic and
     diluted net loss per
     share (unaudited)........                       18,753             21,846
                                                   ========           ========
    Pro forma basic and
     diluted net loss per
     share (unaudited)........                     $  (0.57)          $  (0.57)
                                                   ========           ========
</TABLE>

   The Company has excluded all convertible preferred stock and outstanding
stock options from the calculation of diluted net loss per share because all
such securities are antidilutive for all periods presented. The total number of
shares excluded from the calculations of diluted net loss per share was
659,000, 4,172,000, and 7,711,000 for the years ended December 31, 1996, 1997,
and 1998, respectively, and 2,998,000 and 7,717,000 for the six months ended
June 30, 1998 and 1999, respectively. Such securities, had they been dilutive,
would have been included in the computations of diluted net loss per share
using the treasury stock method.

                                      F-20
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

10. Subsequent Events


Strategic Distribution Agreements (unaudited)

   From January 1, 1999 through September 24, 1999, the Company entered into
agreements for online advertising with Yahoo!, Inc., Microsoft Corporation,
Earthlink Operations, Inc., Excite@Home and Intuit. Aggregate noncancelable
advertising commitments related to these agreements total approximately $5.5
million, $10.5 million and $2.4 million for the second half of 1999 and for the
years ending December 31, 2000 and 2001, respectively. The Company has paid
$500,000 under these agreements in the six months ended June 30, 1999. The
Company could be subject to additional payments under these agreements if
advertising exceeds established levels of page views or generates and exceeds
established levels of new customers.

Pitney Bowes Litigation (unaudited)

   On June 10, 1999, Pitney Bowes filed suit against us in U.S. District Court
alleging infringement of Pitney Bowes patents. The suit alleges that we are
infringing seven patents held by Pitney Bowes related to postage application
systems and seeks treble damages, a preliminary and permanent injunction from
further alleged infringement, attorneys' fees and other unspecified damages. On
July 30, 1999, we filed our answer to Pitney Bowes' complaint in which we deny
all allegations of patent infringement and assert certain affirmative and other
defenses based on statutory and common law grounds, including inequitable
conduct on the part of Pitney Bowes in its procurement of patents in
proceedings before the U.S. Patent and Trademark Office. As part of the answer,
we also brought various counterclaims against Pitney Bowes claiming Pitney
Bowes' violation of Section 2 of the Sherman Act and intentional and tortious
interference with E-Stamp's business relations based, in part, upon our
allegations that Pitney Bowes has unlawfully maintained its monopoly power in
the postage metering market through a scheme to defraud the U.S. Patent and
Trademark Office and its efforts to discourage potential investors and
strategic partners from investing and entering into partnerships with E-Stamp.
Our suit seeks compensatory and treble damages, injunctive relief and recovery
of attorney's fees. On September 21, 1999, Pitney Bowes filed a motion to
strike or dismiss certain of the Company's affirmative defenses and
counterclaims or, in the alternative, to bifurcate discovery and trial of those
counterclaims; the Company's response to the Motion is due in October 1999. We
are continuing to investigate the claims against us as well as infringement by
Pitney Bowes of our patents, and may assert additional defenses or pursue
additional counterclaims or independent claims against Pitney Bowes in the
future.

   Pendency of the litigation can be expected to result in significant expenses
to us and the diversion of management time and other resources. If Pitney Bowes
is successful in its claims against us, then we may be hindered or even
prevented from competing in the Internet postage market and our operations
would be severely harmed. For example, the Pitney Bowes suit could result in
limitations on how we implement our solutions, delays and costs associated with
redesigning our solutions and payments of license fees and other payments. An
injunction obtained by Pitney Bowes could eliminate our ability to market
critical products or services.

Bridge Loan Financing (unaudited)

   On July 12, 1999, the Company entered into bridge loan financing arrangement
with a financial institution under which the Company borrowed $5.0 million.
Amounts borrowed under the arrangement bear interest at a rate of 13% per
annum. In connection with this financing, the Company granted the lender
warrants to purchase 48,496 shares of common stock with an exercise price of
$8.25 per share. These warrants expire in July, 2004. The Company anticipates
recording the fair value of these warrants of approximately $85,000 as interest

                                      F-21
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

10. Subsequent Events (continued)

expense over the period the loan is outstanding. The Company borrowed $5.0
million in July, 1999 under the facility and fully repaid the outstanding
balance in August, 1999.

Employee Option Grants (unaudited)

   From July 1, 1999 to September 24, 1999, options to purchase 1,471,893
shares were granted to employees pursuant to the 1996 Stock Option Plan with
exercise prices of between $1.20 and 6.88 per share. The Company estimates that
additional deferred compensation of $7.9 million will be recorded as a result
of these option grants and amortized to compensation expense in accordance with
the Company's policy.

1996 Stock Plan (unaudited)

   In February 1999, the board of directors approved an amendment increasing
the number of shares reserved for issuance under the 1996 Stock Plan from
3,437,500 to 5,937,500 subject to shareholder approval. The shareholders
approved the increase in April 1999. In August 1999, the board of directors
approved an amendment increasing the number of shares reserved by 81,250
subject to shareholder approval. The shareholders approved the increase in
September 1999.

1999 Stock Plan (unaudited)

   In August 1999, the board of directors approved the 1999 Stock Plan subject
to shareholder approval. A total of 2,500,000 shares of common stock are
reserved for issuance under the plan. The shareholders approved the plan in
September 1999.

1999 Employee Stock Purchase Plan (unaudited)

   In August 1999, the board of directors approved the 1999 Employee Stock
Purchase Plan subject to shareholder approval. A total of 500,000 shares of
common stock has been reserved for issuance under the 1999 Purchase Plan. The
1999 Purchase Plan permits eligible employees to acquire shares of the
Company's common stock through periodic payroll deductions of up to 15% of
total compensation. No more than 5,000 shares may be purchased on any purchase
date per employee. Each offering period will have a maximum duration of 24
months. The price at which the common stock may be purchased is 85% of the
lesser of the fair market value of the Company's common stock on the first day
of the applicable offering period or on the last day of the respective purchase
period. The initial offering period will commence on the effectiveness of the
initial public offering and will end on the last trading day on or before
November 14, 2001. The shareholders approved the plan in September 1999.

1999 Director Option Plan (unaudited)

   In August 1999, the board of directors approved the 1999 Option Plan subject
to shareholder approval. A total of 300,000 shares of common stock are reserved
for issuance under the Plan. The shareholders approved the plan in September
1999.

Initial Public Offering

   In August 1999, the board of directors authorized the filing of a
registration statement with the Securities and Exchange Commission to register
shares of its common stock in connection with a proposed Initial Public

                                      F-22
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

10. Subsequent Events (continued)

Offering ("IPO"). If the offering is consummated under the terms presently
anticipated, all of the outstanding convertible preferred stock as of June 30,
1999 will convert to 8,360,000 shares of common stock upon the closing of the
IPO. The effect of this conversion has been reflected as unaudited pro forma
stockholders' equity in the accompanying consolidated balance sheet at June 30,
1999. Additionally, the shares of Series C preferred stock issued in August
1999 discussed below will convert into 3,660,651 shares of common stock upon
completion of this offering.

   In July 1999, the board of directors authorized an increase in the
authorized number of shares of common stock to 200,000,000 shares subject to
stockholder approval.


Sales of Preferred Stock

   In August 1999, the Company issued 2,928,521 shares of Series C redeemable
convertible preferred stock at $10.31 per share for cash. Series C redeemable
convertible preferred stock carries an 8%, noncumulative dividend, is
convertible into 1.25 shares of common stock and has other rights and
preferences similar to those described for Series A and B convertible stock in
Note 3. In connection with the sale of Series C redeemable convertible
preferred stock, the Company committed to issue warrants to purchase 21,235
shares of Series C redeemable convertible preferred stock at $10.31 per share
to Donaldson, Lufkin & Jenrette Securities Corporation as placement agent.

Stock Grant

   In August 1999, the Company granted 187,500 shares of common stock to two
Company executives. On the date of grant, the Company recorded approximately
$1.8 million of compensation expense.

Sales of Common Stock (unaudited)

   On September 10, 1999, the Company issued 726,745 shares of its common stock
and warrants to purchase an additional 83,855 shares of common stock at an
exercise price of $0.01 per share to investors for cash proceeds of $5.0
million. The fair value of the common stock and warrants was deemed by
management to be $7.8 million and $1.0 million, respectively. The fair value of
the warrants was computed using the Black Scholes method under the following
assumptions: expected volatility of 100%, expected life of 3 years, risk free
interest rate of 6.0% and expected dividend yield of 0.0%.

   In connection with the issuance of common stock and warrants, the Company
and the investors signed non-binding letters of intent to negotiate for a
period of up to one year to enter into definitive joint venture, joint
marketing, cooperation, or technology development agreements.The Company will
record the $3.8 million excess of the fair value of the common stock and
warrants over the consideration received as a prepaid marketing cost (contra
equity account). The balance will be amortized to expense over the one year
period covered by the letter of intent. If it becomes probable that efforts to
reach definitive agreements will cease prior to the end of the one year
negotiation period, the unamortized balance will be fully expensed.

Stock Dividend

   In September 1999, the Company declared a stock dividend of one share of
common stock on each four shares of outstanding common stock pending approval
by the Board of Directors. This dividend resulted in a

                                      F-23
<PAGE>

                              E-STAMP CORPORATION
                         (a development stage company)

                   NOTES TO FINANCIAL STATEMENTS--(Continued)
   (Information for the six months ended June 30, 1998 and 1999 is unaudited)

10. Subsequent Events (continued)

change in the conversion ratio of the Series A, B and C redeemable convertible
preferred stock from one-for-one to 1.25-for-one. All common stock, option and
warrant information, weighted average shares, the preferred to common stock
conversion ratio and loss per share information has been retroactively restated
to reflect the common stock dividend.

Planned Rescission Offer (unaudited)

   Shares issued, and option grants made under the Company's 1996 Employee
Plan, 1996 Director Plan and 1999 Stock Plan (the "Plans") may not have
qualified for exemption from registration or qualification under federal and
state securities laws. Therefore, the Company intends to make a rescission
offer for these shares and options after the effective date of the proposed
initial public offering which, if accepted, could require the Company to make
aggregate payments to the holders of these shares and options of up to
$6,900,000 plus statutory interest.

   The Company plans to commence, approximately 30 days after the effectiveness
of this offering, a rescission offer pursuant to a registration statement filed
under the Securities Act of 1933, as amended, and pursuant to the state
securities laws of California covering shares of common stock issued, and
options to purchase shares of common stock granted, under the Plans. The
Company will offer to rescind any prior sales at the price per share paid
therefor (average $1.22 per share) plus interest thereon at a statutory rate as
the case may be from the date of purchase by the purchaser to the expiration of
the rescission offer. The rescission offer will expire approximately 30 days
after the effectiveness of the registration statement relating to the
rescission stock. Under the rescission offer, the Company would be required to
make an aggregate payment of approximately $6,300,000 plus the aggregate amount
of interest thereon for shares acquired through October 1, 1999, if all
offerees accept the offer. Offerees who do not accept the rescission offer
will, for purposes of applicable federal and state securities laws, be deemed
to hold registered shares under the Act which will be freely tradeable in the
public market as of the effective date of the registration statement with
respect to the rescission stock. The Act does not expressly provide that a
rescission offer will terminate a purchaser's right to rescind a sale of stock
which was not registered under the Act as required. Accordingly, should the
rescission offer be rejected by any or all offerees, the Company may continue
to be contingently liable under the Act for the purchase price of the
rescission stock up to an aggregate amount of approximately $6,300,000 plus
statutory interest.

   In addition, the Company is unable to rely on the exemption provided by
Section 25102(f) of the California Corporation Code for its options to purchase
shares of common stock granted under its 1996 Stock Option and Restricted Stock
Plan and our 1996 Non-Employee Director Stock Option Plan. As of October 1,
1999 options to purchase 273,265 shares of common stock at a weighted average
exercise price of $6.88 per share were outstanding under our 1999 Stock Plan,
options to purchase 1,118,308 shares of common stock at a weighted average
exercise price of $0.90 per share were outstanding under the Company's 1996
Stock Option and Restricted Stock Plan and options to purchase 19,062 shares of
common stock at a weighted average exercise price of $0.40 per share were
outstanding under the Company's 1996 Non-Employee Director Option Plan, all of
which options are potentially subject to the rescission, and the Company plans
to include them in its planned rescission offer discussed above. Under such
rescission offer, the Company could be required to make an aggregate payment of
up to approximately $600,000 for such grants.

   As of the date hereof, the Company is not aware of any claims for rescission
against us.

                                      F-24
<PAGE>

- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
      , 1999

                               [LOGO OF E-STAMP]


                       6,500,000 Shares of Common Stock

                             ---------------------

                                  PROSPECTUS

                             --------------------

                         Donaldson, Lufkin & Jenrette

                        Banc of America Securities LLC

                           Deutsche Banc Alex. Brown

                                DLJdirect Inc.

- -------------------------------------------------------------------------------

We have not authorized any dealer, sales person or other person to give you
written information other than this prospectus or to make representations as
to matters not stated in this prospectus. You must not rely on unauthorized
information. This prospectus is not an offer to sell these securities or our
solicitation of your offer to buy the securities in any jurisdiction where
that would not be permitted or legal. Neither the delivery of this prospectus
nor any sales made hereunder after the date of this prospectus shall create an
implication that the information contained herein or the affairs of E-Stamp
Corporation have not changed since the date hereof.

- -------------------------------------------------------------------------------

- -------------------------------------------------------------------------------

Until      , 1999 (25 days after the date of this prospectus), all dealers
that effect transactions in these shares of common stock may be required to
deliver a prospectus. This is in addition to the dealer's obligation to
deliver a prospectus when acting as an underwriter and with respect to their
unsold allotments or subscriptions.

- -------------------------------------------------------------------------------
<PAGE>

                                    PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance and Distribution

   The following table sets forth the costs and expenses, other than
underwriting discounts and commissions, payable by E-Stamp Corporation in
connection with the sale of common stock being registered. All amounts are
estimates except the SEC registration fee and the NASD filing fee.

<TABLE>
   <S>                                                               <C>
   SEC registration fee............................................. $   33,249
   NASD filing fee.................................................. $   11,000
   Nasdaq National Market listing fee............................... $   95,000
   Printing and engraving costs..................................... $  200,000
   Legal fees and expenses.......................................... $  350,000
   Accounting fees and expenses..................................... $  200,000
   Blue Sky fees and expenses....................................... $   15,000
   Transfer Agent and Registrar fees................................ $   50,000
   Miscellaneous expenses........................................... $   45,751

   Total............................................................ $1,000,000
</TABLE>

Item 14. Indemnification of Directors and Officers

   Section 145 of the Delaware General Corporation Law permits a corporation to
include in its charter documents, and in agreements between the corporation and
its directors and officers, provisions expanding the scope of indemnification
beyond that specifically provided by the current law.

   Article IX of the Registrant's Restated Certificate of Incorporation
provides for the indemnification of directors to the fullest extent permissible
under Delaware law.

   Article VI of the Registrant's Bylaws provides for the indemnification of
officers, directors and third parties acting on behalf of the Registrant if
such person acted in good faith and in a manner reasonably believed to be in
and not opposed to the best interest of the Registrant, and, with respect to
any criminal action or proceeding, the indemnified party had no reason to
believe his or her conduct was unlawful.

   The Registrant has entered into indemnification agreements with its
directors and executive officers, in addition to indemnification provided for
in the Registrant's Bylaws, and intends to enter into indemnification
agreements with any new directors and executive officers in the future.

   The Underwriting Agreement (Exhibit 1.1 hereto) provides for indemnification
by the Underwriters of the registrant and its executive officers and directors,
and by the registrant of the underwriters for certain liabilities, including
liabilities arising under the Securities Act, in connection with matters
specifically provided in writing by the Underwriters for inclusion in the
Registration Statement.

Item 15. Recent Sales of Unregistered Securities

   (a) During the past three years, the Registrant has issued unregistered
securities to a limited number of persons as described below:

   (1) On September 3, 1997, we issued an aggregate of 2,500,000 shares of our
Series A Preferred Stock to accredited investors for an aggregate offering
price of $6,000,000.

   (2) On July 7, 1998, we issued an aggregate of 4,188,000 shares of our
Series B Preferred Stock to accredited investors for an aggregate offering
price of $16,000,000.

   (3) On July 26, 1999, we granted a warrant to a lender to purchase up to
48,496 shares of Common Stock at $8.25 per share, as adjusted for our stock
dividend.

                                      II-1
<PAGE>

   (4) On August 3, 1999 and August 10, 1999, we issued an aggregate of
2,928,521 shares of our Series C Preferred Stock to accredited investors,
including a number of our existing preferred and common stockholders, for an
aggregate offering price of $30,193,051.

   (5) On August 10, 1999, we granted a warrant to our placement agent for our
Series C Preferred Stock financing to purchase up to 21,235 shares of Series C
Preferred Stock at $10.31 per share.

   (6) From September 1996 to September 1999, we have granted options to
purchase an aggregate of 7,487,718 shares of common stock to our directors,
executive officers, employees and consultants at a weighted exercise price of
$0.86, as adjusted for our stock dividend. Under the Registrant's 1996 Stock
Option and Restricted Stock Plan and the Registrant's 1996 Non-Employee
Director Stock Option Plan, of which options to purchase 1,028,000 shares, as
adjusted for our September 1999 stock dividend, were cancelled without
exercise.

   (7) In August 1999, we granted stock bonuses of an aggregate of 187,500
shares of common stock to one of our executive officers and one of our
directors, and we granted an option to purchase 62,500 shares of common stock
at an exercise price of $6.88 per share to one of our directors, in each case
as adjusted for our stock dividend.

   (8) As of September 10, 1999, an aggregate of 5,317,755 shares of common
stock had been issued upon exercise of options under the Registrant's 1996
Stock Option and Restricted Stock Plan at a weighted purchase price of $0.87
per share, of which 428,779 shares have been repurchased by the Registrant.

   (9) On September 10, 1999, we issued an aggregate of 726,745 shares of our
common stock to Deutsche Post International B.V. and 1. T-Telematik Venture
Beteiligungsgesellschaft mbH at a purchase price of $6.88 per share, as
adjusted for our stock dividend. On September 10, 1999, these two investors
also paid an aggregate of $168 for warrants to purchase 83,855 shares of common
stock at an exercise price of $0.01 per share, as adjusted for our stock
dividend. These warrants were exercised on September 10, 1999.

   (10) As of October 1, 1999, an aggregate of 273,265 shares of common stock
had been issued upon exercise of options under the Registrant's 1999 Stock Plan
at a weighted purchase price of $6.88 per share.

   (b) Except as indicated above, none of the foregoing transactions involved
any underwriters, underwriting discounts or commissions, or any public
offering, and the Registrant believes that each transaction described in
paragraphs (1) through (5) was exempt from the registration requirements of the
Securities Act by virtue of Section 4(2) thereof or Regulation D promulgated
thereunder and that the transactions described in paragraph (9) were exempt
from the registration requirements of the Securities Act by virtue of
Regulation S promulgated thereunder. The recipients in such transactions
represented their intention to acquire the securities for investment only and
not with a view to or for sale in connection with any distribution thereof, and
appropriate legends were affixed to the share certificates and instruments
issued in such transactions. All recipients had adequate access, through their
relationships with the Registrant, to information about the Registrant.

   The stock issuances described in paragraphs (7), (8) and (10) above were not
made pursuant to a registration statement under the Securities Act, nor were
the offer and sale registered or qualified under any state securities laws.
Although the Registrant believed at the time that such offers and sales were
exempt from such registration or qualification, they may not have been exempt.
As a result, purchasers of such shares may have the right under the Securities
Act or state securities laws to rescind their purchases and thereby be entitled
to return such shares to the Registrant and receive back from the Registrant
the full consideration paid by such purchasers which aggregates approximately
$6,300,000 plus interest. The Registrant expects to commence a rescission offer
to holders of such shares approximately 30 days after the effectiveness of its
initial public offering.


                                      II-2
<PAGE>

   In addition, the Registrant may not have had an exemption from qualification
under state securities laws for the options issued under the Registrant's 1996
Non-Employee Director Stock Option Plan and 1999 Stock Plan. These options are
subject to rescission, and the Registrant intends to include them in its
planned rescission offer discussed above. Under such rescission offer, the
Registrant could be required to make an aggregate payment of up to
approximately $600,000 relating to these options. There are no assurances that
the Registrant will not otherwise be subject to possible penalties or fines
relating to these issuances. The Registrant believes the rescission offers
could provide it with additional meritorious defenses to any such future
claims.

                                      II-3
<PAGE>

Item 16. Exhibits and Financial Statement Schedules

   (a) Exhibits

<TABLE>
<CAPTION>
 Exhibit
 Number
 -------
 <C>     <S>
  1.1**  Form of Underwriting Agreement.
  3.1**  Certificate of Incorporation of the Registrant.
  3.2**  Bylaws of the Registrant.
  3.3**  Form of Amended and Restated Certificate of Incorporation of
         Registrant.
  3.4**  Form of Amended and Restated Bylaws of Registrant.
  3.5**  Certificates of Designation of Registrant relating to Series A
         Preferred Stock.
  3.6**  Certificates of Designation of Registrant relating to Series B
         Preferred Stock.
  3.7**  Certificate of Designation of Registrant relating to Series C
         Preferred Stock.
  3.8**  Amendment to Certificate of Incorporation of the Registrant.
  4.1**  Specimen Common Stock Certificate.
  5.1**  Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation.
 10.1**  Form of Indemnification Agreement between the Registrant and each of
         its directors and officers.
 10.2**  1999 Stock Plan and form of agreements thereunder.
 10.3**  1999 Employee Stock Purchase Plan and form of agreements thereunder.
 10.4**  1999 Director Option Plan and form of agreements thereunder.
 10.5**  1996 Stock Option and Restricted Stock Plan.
 10.6**  1996 Non-Employee Director Stock Option Plan.
 10.7**  Second Amended and Restated Investors Rights Agreement.
 10.8**  Employment Agreement, dated March 29, 1996, between Registrant and
         Nicole Ward (Eagan).
 10.9**  Employment Agreement, dated May 13, 1996, between Registrant and
         Martin Pagel.
 10.10** Employment Agreement, dated July 27, 1996, between Registrant and
         Thomas Reinemer.
 10.11** Promissory Note, dated May 30, 1999, between Registrant and Robert H.
         Ewald.
 10.12** Crypto iButton Service Provider Agreement dated August 21, 1998,
         between Registrant and Dallas Semiconductor Corporation.
 10.13+  Premium Partner Website Marketing Agreement dated July 1, 1999,
         between Registrant and Microsoft Corporation.
 10.14+  America Online Strategic Marketing Agreement dated November 13, 1998,
         between Registrant and America Online.
 10.15   Turnkey/Inventory Agreement dated June 1, 1999, between Registrant and
         Modus Media International.
 10.16+  Agreement for Services dated June 27, 1997 between Registrant and
         Pilot Network Services, Inc.
 10.17** Sublease Agreement dated February 2, 1999 between the Registrant and
         Electronics for Imaging, Inc.
 10.18+  Advertising and Promotion Agreement dated May 14, 1999 between
         Registrant and Yahoo!, Inc.
 10.19+  Letter Agreement dated August 2, 1999 between Registrant and At Home
         Corporation.
 10.20+  Platinum Premier Partner Package Agreement dated June 25, 1999 between
         Registrant, EarthLink Network, Inc. and EarthLink Operations, Inc.
 10.21+  Services Agreement dated September 24, 1999 between Registrant and
         Intuit Inc.
 23.1**  Consent of Wilson Sonsini Goodrich & Rosati, Professional Corporation.
         (see Exhibit 5.1).
 23.2    Consent of Ernst & Young LLP, Independent Auditors.
 23.3**  Consent of Howrey & Simon.
 23.4**  Consent of Rebecca Saeger.
 24.1**  Power of Attorney.
 27.1**  Financial Data Schedules.
</TABLE>
- ---------------------
** Previously filed.
+  The registrant is seeking confidential treatment of certain portions of this
   exhibit from the Commission. The omitted portions have been filed separately
   with the Commission.

                                      II-4
<PAGE>

   (b) Financial Statement Schedules

   Schedules not listed above have been omitted because the information
required to be set forth therein is not applicable or is shown in the financial
statements or notes thereto.

Item 17. Undertakings

   The undersigned Registrant hereby undertakes to provide to the Underwriters
at the closing specified in the Underwriting Agreement certificates in such
denominations and registered in such names as required by the Underwriters to
permit prompt delivery to each purchaser.

   Insofar as indemnification by the Registrant for liabilities arising under
the Securities Act may be permitted to directors, officers and controlling
persons of the Registrant pursuant to the provisions referenced in Item 14 of
this Registration Statement or otherwise, the Registrant has been advised that
in the opinion of the Securities and Exchange Commission such indemnification
is against public policy as expressed in the Securities Act, and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or
paid by a director, officer or controlling person of the Registrant in the
successful defense of any action, suit or proceeding) is asserted by a
director, officer or controlling person in connection with the securities being
registered hereunder, the Registrant will, unless in the opinion of its counsel
the matter has been settled by controlling precedent, submit to a court of
appropriate jurisdiction the question whether such indemnification by it is
against public policy as expressed in the Securities Act and will be governed
by the final adjudication of such issue.

   The undersigned Registrant hereby undertakes that:

   (1) For purposes of determining any liability under the Securities Act, the
information omitted from the form of Prospectus filed as part of this
Registration Statement in reliance upon Rule 430A and contained in a form of
Prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or 497(h)
under the Securities Act shall be deemed to be part of this Registration
Statement as of the time it was declared effective.

   (2) For the purpose of determining any liability under the Securities Act,
each post-effective amendment that contains a form of Prospectus shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

                                      II-5
<PAGE>

                                   SIGNATURES

   Pursuant to the requirements of the Securities Act of 1933, as amended, the
registrant has duly caused this Amendment to the Registration Statement to be
signed on its behalf by the undersigned, thereunto duly authorized, in the City
of San Mateo, State of California, on the 7th day of October, 1999.

                                          E-STAMP CORPORATION

                                                    /s/ Robert H. Ewald
                                          By: _________________________________
                                                      Robert H. Ewald
                                               President and Chief Executive
                                                          Officer

   Pursuant to the requirements of the Securities Act of 1933, as amended, this
Amendment to the Registration Statement has been signed by the following
persons in the capacities and on the dates indicated below.

<TABLE>
<CAPTION>
             Signature                           Title                  Date
             ---------                           -----                  ----

<S>                                  <C>                           <C>
        /s/ Robert H. Ewald          President, Chief Executive    October 7, 1999
____________________________________  Officer and Director
          Robert H. Ewald             (Principal Executive
                                      Officer)

     /s/ Anthony H. Lewis, Jr.       Vice President and Chief      October 7, 1999
____________________________________  Financial Officer
       Anthony H. Lewis, Jr.          (Principal Financial and
                                      Accounting Officer)

                 *                   Chairman of the Board         October 7, 1999
____________________________________
         Marcelo A. Gumucio

                 *                   Director                      October 7, 1999
____________________________________
           John V. Balen

                 *                   Director                      October 7, 1999
____________________________________
          Thomas L. Rosch

                 *                   Director                      October 7, 1999
____________________________________
         Gregory S. Stanger

                 *                   Director                      October 7, 1999
____________________________________
            Adam Wagner

                                     Director                      October 7, 1999
____________________________________
           Rebecca Saeger
</TABLE>


        /s/ Robert H. Ewald
*By: __________________________
   Robert H. Ewald Attorney-in-
               Fact

                                      II-6
<PAGE>

<TABLE>
<CAPTION>
 Exhibit
 Number
 -------
 <C>     <S>
  1.1**  Form of Underwriting Agreement.
  3.1**  Certificate of Incorporation of the Registrant.
  3.2**  Bylaws of the Registrant.
  3.3**  Form of Amended and Restated Certificate of Incorporation of
         Registrant.
  3.4**  Form of Amended and Restated Bylaws of Registrant.
  3.5**  Certificates of Designation of Registrant relating to Series A
         Preferred Stock.
  3.6**  Certificates of Designation of Registrant relating to Series B
         Preferred Stock.
  3.7**  Certificate of Designation of Registrant relating to Series C
         Preferred Stock.
  3.8**  Amendment to Certificate of Incorporation of the Registrant.
  4.1**  Specimen Common Stock Certificate.
  5.1**  Opinion of Wilson Sonsini Goodrich & Rosati, Professional Corporation.
 10.1**  Form of Indemnification Agreement between the Registrant and each of
         its directors and officers.
 10.2**  1999 Stock Plan and form of agreements thereunder.
 10.3**  1999 Employee Stock Purchase Plan and form of agreements thereunder.
 10.4**  1999 Director Option Plan and form of agreements thereunder.
 10.5**  1996 Stock Option and Restricted Stock Plan.
 10.6**  1996 Non-Employee Director Stock Option Plan.
 10.7**  Second Amended and Restated Investors Rights Agreement.
 10.8**  Employment Agreement, dated March 29, 1996, between Registrant and
         Nicole Ward (Eagan).
 10.9**  Employment Agreement, dated May 13, 1996, between Registrant and
         Martin Pagel.
 10.10** Employment Agreement, dated July 27, 1996, between Registrant and
         Thomas Reinemer.
 10.11** Promissory Note, dated May 30, 1999, between Registrant and Robert H.
         Ewald.
 10.12** Crypto iButton Service Provider Agreement dated August 21, 1998,
         between Registrant and Dallas Semiconductor Corporation.
 10.13+  Premium Partner Website Marketing Agreement dated July 1, 1999,
         between Registrant and Microsoft Corporation.
 10.14+  America Online Strategic Marketing Agreement dated November 13, 1998,
         between Registrant and America Online.
 10.15   Turnkey/Inventory Agreement dated June 1, 1999, between Registrant and
         Modus Media International.
 10.16+  Agreement for Services dated June 27, 1997 between Registrant and
         Pilot Network Services, Inc.
 10.17** Sublease Agreement dated February 2, 1999 between the Registrant and
         Electronics for Imaging, Inc.
 10.18+  Advertising and Promotion Agreement dated May 14, 1999 between
         Registrant and Yahoo!, Inc.
 10.19+  Letter Agreement dated August 2, 1999 between Registrant and At Home
         Corporation.
 10.20+  Platinum Premier Partner Package Agreement dated June 25, 1999 between
         Registrant, EarthLink Network, Inc. and EarthLink Operations, Inc.
 10.21+  Services Agreement dated September 24, 1999 between Registrant and
         Intuit Inc.
 23.1**  Consent of Wilson Sonsini Goodrich & Rosati, Professional Corporation.
         (see Exhibit 5.1).
 23.2    Consent of Ernst & Young LLP, Independent Auditors.
 23.3**  Consent of Howrey & Simon.
 23.4**  Consent of Rebecca Saeger.
 24.1**  Power of Attorney.
 27.1**  Financial Data Schedules.
</TABLE>
- ---------------------
** Previously filed.
+  The registrant is seeking confidential treatment of certain portions of this
   exhibit from the Commission. The omitted portions have been filed separately
   with the Commission.

<PAGE>

                                                                   EXHIBIT 10.13

                  PREMIUM PARTNER WEBSITE MARKETING AGREEMENT

This Agreement (the "Agreement") is entered into and effective as of July 1 1999
(the "Effective Date"), by and between MICROSOFT CORPORATION ("Microsoft"), a
Washington corporation located at One Microsoft Way, Redmond, WA 98052-6399, and
E-STAMP CORPORATION, ("E-Stamp"), a Delaware corporation located at 2855 Campus
Drive, Suite 100, San Mateo CA 94403.

                                    RECITALS

     A.  E-Stamp has developed technology approved by the United States Postal
          Service for limited beta testing allowing consumers and businesses to
          buy United States postage over the Internet and to print purchased
          postage onto envelopes and other documents created with Microsoft
          Office and other applications.

     B.  Microsoft maintains a Web site for Microsoft Office, the Microsoft
          Office Update site, containing information and hyperlinks to goods and
          services useful to consumers and businesses using Microsoft Office
          applications.

     C.  E-Stamp wishes to be identified on the Microsoft Office Update Web site
          as Microsoft's Premium online Postage Partner, and wishes for
          Microsoft to display information about E-Stamp and its services on the
          Office Update Web site, including placing hyperlinks from the Office
          Update Web site back to E-Stamp's Web site.

NOW, THEREFORE; the parties agree as follows:

                                   AGREEMENT

1.   DEFINITIONS

     1.1. "ACCOUNT MANAGER" means the individual assigned by each of the
          parties to serve as that party's primary liaison with the other party
          for purposes of administration of this Agreement during the Term of
          Promotion.

     1.2. "CONTENT" means any and all text, logos, artwork, graphics, pictures,
          sounds, video, or other material, in any format whatsoever, supplied
          by E-Stamp to Microsoft from time to time during the term of this
          Agreement for purposes of promoting E-Stamp on the Office Site.

     1.3. "E-STAMP COMPETITOR" means any business offering services pursuant to
          the United States Postal Service's Information Based Indicia Program
          (IBIP) for providing postage via the Internet or other Internet
          postage-related services substantially similar to those provided by E-
          Stamp.

     1.4. "HOME PAGE" means the default Web Page displayed upon accessing
          http://OfficeUpdate.Microsoft.com. or its functional equivalent.

     1.5. "IMPRESSION" means the appearance of text, graphics, or other
          material on an accessed Web Page.

     1.6. "INTRODUCTORY PAGES" means the Web Pages created by Microsoft and
          updated from time to time pursuant to this Agreement that are: (i) co-
          branded with Microsoft and E-Stamp logos, (ii) contain certain
          Content, (iii) the targets of Quicklinks and Promotions, and (iv)
          contain prominent hyperlinks to the E-Stamp site on the World Wide Web
          located at http://www.e-stamp.com, or its functional replacement, all
          as more fully described in Exhibit A.

     1.7. "LOGS" means the appropriate logs from the Web server(s) on which the
          Office Update Site are hosted indicating the number of Impressions of
          the Quicklinks on the Home Page and Product Pages, the Promotion, and
          the Services Page Listings delivered during a specified time period.

[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.

                                       1
<PAGE>

     1.8. "OFFICE SITES" means the group of Web Sites within the Microsoft.com
          domain which showcase. market, and provide information about Microsoft
          Office and its component applications, including, by way of example,
          the Office Update Site.

     1.9. "OFFICE UPDATE SITE" means the Web Site located at
          http://OfficeUpdate.Microsoft.com or its functional replacement.

     1.10."PRODUCT PAGES" means the Web Pages located on the Office Update
          Site devoted to the software applications of which Microsoft Office is
          composed, or their functional replacements, current examples of which
          are welcomeWord.htm and welcomeExcel.htm.

     1.11."PROMOTION" means the display and placement of certain Content, as
          more fully described in Exhibit A.
                                  ---------

     1.12."PROMOTIONAL IMPRESSION" means an Impression of a Promotion.

     1.13."QUICKLINK IMPRESSION" means an Impression of a Quicklink delivered
          from the Home Page or the Product Pages.

     1.14."QUICKLINK" means the display and placement of hyperlinked text in a
          certain region of a Web Page on the Office Update Site linking to an
          Introductory Page, as more fully described in Exhibit A.
                                                        ---------

     1.15."SERVICES PAGE" means the Web page located at
          http://OfficeUpdate.Microsoft.com/services.htm or its functional
          replacement.

     1.16."SERVICES PAGE LISTING" means the display and placement of
          hyperlinked text in a certain region of the Services page, as more
          fully described in Exhibit A.
                             ---------

     1.17."SERVICES PAGE LISTING IMPRESSION" means an Impression of a Services
          Page Listing.

     1.18."SPECIFICATIONS" means the specifications, mock-ups, and other
          material attached as Exhibit A.
                               ---------

     1.19."TERM OF PROMOTION" means the period beginning on the date described
          in Section
             -------
          2.1 and ending one (1) year thereafter, as may be renewed
          pursuant to Section 9.1.
                      ------- ---

     1.20."WEB PAGE" means a document written in HTML or other industry
          standard mark-up language made available via the Internet by server
          software using HTTP to effect data transmission.

     1.21."WEB SITE" means a collection of hyperlinked Web Pages.

2.   MICROSOFT TO PROMOTE E-STAMP ON THE OFFICE UPDATE SITE

     2.1. Commencement of Term of Promotion. The Term of Promotion shall
          ---------------------------------
          commence on the later of (i) August 1, 1999; or (ii) thirty (30) days
          following the date E-Stamp receives approval from the United States
          Postal Service to participate in its Information Based Indicia Program
          (IBIP) for providing postage via the Internet; provided, however, that
          E-Stamp may waive such thirty-day period by providing Microsoft
          written notice of its desire for the Term of Promotion to commence
          earlier.

     2.2. Promotion of E-Stamp. During the Term of Promotion, Microsoft shall
          --------------------
          promote E-Stamp by means of Quicklinks on the Home Page and the
          Product Pages and any other Web Pages created by Microsoft on the
          Office Sites that contain Quicklinks, and by means of Introductory
          Pages, the Promotions, and the Services Page Listing created by
          Microsoft, as described in the

                                       2
<PAGE>

          Specifications, and shall deliver the Impressions described in Exhibit
          B. E-Stamp may request changes to the Specifications to maximize
          click-through from time to time, and such requests shall be considered
          by Microsoft's Account Manager in good faith. In promoting E-Stamp
          during the Term of Promotion, Microsoft shall provide E-Stamp with
          positioning and editorial content on the Office Sites more favorable
          than that given to any E-Stamp Competitor. Without limiting the
          foregoing, Microsoft shall allow E-Stamp to propose editorial content
          and request editorial topics for the Office Update Site and shall not
          post editorial content of any E-Stamp Competitor in an area of the
          Office Update Site other than on pages similar to Introductory Pages
          that Microsoft may provide to an E-Stamp Competitor.

     2.3. Premium Partner Status. During the Term of Promotion, Microsoft shall
          ----------------------
          (i) treat E-Stamp as a "Premium Partner" with respect to the Office
          Update Site and (ii) not treat any E-Stamp Competitor as a "Premium
          Partner" with respect to the Office Update Site. "Premium Partner"
          status during the Term of Promotion shall be defined exclusively by
          the provisions of this Section 2.3, as follows:
                                 -----------

          2.3.1.  Press Releases. Microsoft agrees that any mention of E-Stamp
                  --------------
               in press releases and customer communications will refer to E-
               Stamp as a "Premium Partner."

          2.3.2.  Services Page. Microsoft shall provide E-Stamp with the
                  -------------
               prominent on-line postage position on the Services Pages in
               accordance with the Specifications and Exhibit B, and shall not
                                                      ---------
               allow any E-Stamp Competitor to occupy the same on-line postage
               position.

          2.3.3.  Product Pages. Microsoft shall provide E-Stamp with the
                  -------------
               Promotion areas indicated in the Specifications and shall provide
               the Impressions of such Promotions described on Exhibit B.
                                                               ---------
               Further, Microsoft shall not sell to any E-Stamp Competitor more
               than [***] percent ([***])% of eligible Impressions on the
               Product Pages and shall not allow any E-Stamp Competitor to
               occupy the large Promotion position on the Product Pages as
               indicated in the Specifications.

          2.3.4.  Home Page. Microsoft shall provide E-Stamp with the largest
                  ---------
               promotional space (as measured in pixel area when displayed), the
               small promotional space, and a Quicklink on the Home Page in
               accordance with the Specifications and Exhibit B and shall not
                                                      ---------
               allow any E-Stamp Competitor to occupy any promotional spaces on
               the Home Page or to have a Quicklink.

          2.3.5.  Enhanced Introductory Pages. Microsoft agrees that the
                  ---------------------------
               Introductory Pages provided to E-Stamp hereunder shall include
               greater function and/or depth than Introductory Pages provided to
               any E-Stamp Competitor pages. At such time as E-Stamp develops a
               wholly software-based solution for on-line postage, E-Stamp shall
               be allowed to link, market, and otherwise mention that solution
               as a part of the Content on the Introductory Pages. Microsoft and
               E-Stamp agree to discuss in good faith the possibilities for
               integration of E-Stamp's software-only Internet postage service
               (HTML version) into the Office Update Site once such service is
               available. Microsoft agrees to offer any opportunities covered in
               the previous sentence to E-Stamp prior to offering them to any E-
               Stamp Competitor.

          2.3.6.  Possible Enhancements to Office Update Site. If Microsoft
                  -------------------------------------------
               decides to include on the Office Update Site a Web Page or Pages
               containing standard postage information ("Postage Information
               Page(s)"), including by way of example postage rate information,
               shipping zones, and zip code look-up functionality, and if
               Microsoft further decides not to create the Postage Information
               Page(s) itself, it will offer E-Stamp the opportunity to create
               such co-branded Postage Information Page(s) before offering the
               opportunity to any E-Stamp Competitor. Microsoft retains complete
               discretion over whether to include Postage Information Page(s) on
               the Office Update Sites, and, if so, whether to create the
               Postage Information Page(s) itself. If Microsoft decides to
               include an "Office Services"


[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.

                                       3
<PAGE>

               pull-down menu on the Home Page in accordance with the
               Specifications, Microsoft shall include E-Stamp on such menu.

          2.3.7.  Additional Opportunities. If Microsoft decides to provide to
                  ------------------------
               an E-Stamp Competitor or other businesses which it deems "Premium
               Partners" on the Office Update Site other benefits regarding the
               Office Update Site, Microsoft shall offer such benefits to E-
               Stamp as well on similar terms.

     2.4. Provision of Content; Links; Most Favored Customer. In order to
          --------------------------------------------------
          facilitate Microsoft's promotion of E-Stamp as provided in Section
          2.2, E-Stamp shall provide the Content to Microsoft and shall
          supplement and update the Content from time to time as requested by
          Microsoft or as submitted by E-Stamp. Subject to the placement
          required by Section 2.3 and the Specifications, all Content shall be
                      -----------
          subject to approval by Microsoft prior to inclusion in any Office
          Site, and the inclusion, placement, type and position of Content,
          hyperlinks, and other material or elements of any type whatsoever on
          the Office Sites shall be at Microsoft's reasonable discretion to
          promptly accept or reject. During the Term of Promotion, E-Stamp shall
          use reasonable efforts to ensure that all URLs to which Microsoft
          provides a hyperlink are functional and accessible at all times.
          Microsoft may test E-Stamp's URLs, and in Microsoft's reasonable
          discretion may remove any hyperlink that fails to comply with the
          requirements of this Section 2.4. Microsoft will make commercially
                               ------------
          reasonable attempts to notify E-Stamp of any broken hyperlinks and
          allow E-Stamp the opportunity to correct the broken hyperlinks before
          removing them from the Office Sites. E-Stamp shall further ensure
          that, during the term of this Agreement, E-Stamp will offer to
          Microsoft customers using E-Stamp customer benefits equal to or better
          than that which E-Stamp provides to other similarly situated customers
          of other of its other similarly situated online partners. Without
          limiting the foregoing, if E-Stamp offers any promotional or special
          offers through any other similar distribution channels, E-Stamp will
          offer similar services via the Office Update Site (the "Special
          Offers"). Any Special Offers made available by E-Stamp will be no less
          favorable, in any respect, than any special offers funded solely by E-
          Stamp through any other online distribution channels.

     2.5. Control of Web Sites. Microsoft retains sole right and control over
          --------------------
          the programming, content and conduct of the Office Sites. E-Stamp
          acknowledges that Microsoft, in its discretion, periodically may make
          changes to the organization, content, design, and features of the
          Office Sites. Nothing in this Agreement shall prohibit such changes;
          nor shall any such changes relieve E-Stamp from its payment
          obligations under Section 5 of this Agreement; provided, however,
                            ---------
          Microsoft shall provide E-Stamp with advance notice of any change that
          is, in Microsoft's reasonable discretion, likely to have a material
          and adverse impact on the promotion of E-Stamp via any Office Site. In
          the event of such changes, Microsoft shall substitute Web Pages
          substantially similar to those that were affected by the change and
          continue to deliver the Impressions listed on Exhibit B.


     2.6. Logs: On-Line Access. Microsoft shall provide weekly reports to E-
          --------------------
          Stamp based on the Logs in the standard format customarily provided to
          other businesses receiving similar promotion on the Office Sites.
          Microsoft shall provide E-Stamp with a URL address and password to
          gain access to an on-line Log reporting site operated by Microsoft.
          Microsoft shall use commercially reasonable efforts to have the on-
          line Log reporting site updated at the end of every business day with
          respect to the prior business day's information, and to provide E-
          Stamp with 24-hour-per-day and 7-day-per-week access to this reporting
          site. The information available through the on-line reporting shall be
          for preliminary reference purposes only and subject to amendment by
          the reports delivered under this Section 2.6.

     2.7. Account Managers. Each party shall appoint an Account Manager whose
          ----------------
          responsibilities shall include monitoring the performance of
          obligations under this Agreement. The parties' Account Managers shall
          have regular communications to review each others' respective
          performance under this Agreement, and to discuss any proposed changes
          to Content, Web Pages, and Promotions that are the subject of this
          Agreement.

                                       4
<PAGE>

     2.8. Impression Shortfall or Overage. Within ten (10) days of the last day
          -------------------------------
          of each quarter during the Term of Promotion, Microsoft shall provide
          to E-Stamp a full report of the total number of Impressions (separated
          to show Quicklink Impressions and Service Listing Impressions)
          delivered by Microsoft to E-Stamp during such quarter.

          2.8.1.  Shortfall. If during any month during the term of this
                  ---------
               Agreement. Microsoft does not provide the total number of
               Impressions set forth on Exhibit B in Sections B.1 and B.2, then
                                        ---------    ------------     ---
               Microsoft shall, during the next month, deliver the required
               total number of Impressions set forth in Sections B.1 and B.2,
               plus the difference between the total number of Impressions in
               Sections B.1 and B.2 and the number of Impressions delivered in
               ------------     ---
               the month giving rise to the shortfall. If the total number of
               Impressions delivered in any quarter is less than [****] then
               Microsoft shall provide E-Stamp with a pro rata reimbursement for
               fees paid for those Impressions not delivered.

          2.8.2.  Overage. Alternatively, if during any month during the term of
                  -------
               this Agreement the total number of Quicklink Impressions and
               Service Listing Impressions is greater than [****], E-Stamp
               shall pay to Microsoft an additional US$50,000 (the "Overage
               Fee"). Microsoft shall provide E-Stamp with an invoice for all
               Overage Fees on a quarterly basis. Along with such invoice,
               Microsoft shall provide a report containing a description of the
               Overage Fees incurred during that quarter. Any Overage Fee shall
               be due within thirty (30) days of issuance of the invoice for
               such Overage Fee.

     2.9. Purchase of Additional Promotional Impressions. If at any time during
          ----------------------------------------------
          the term of this Agreement, Microsoft has an opportunity on the Home
          Page or Product Pages, or on other Web Pages within the Office Update
          Site, to make available additional Promotional Impressions, or
          additional Quicklinks, Microsoft agrees that E-Stamp shall be offered
          the right to purchase those Impressions or Quicklinks before any right
          of purchase is offered to any E-Stamp Competitor; provided, however,
          that E-Stamp's right to purchase under this Section 2.9 shall not
                                                      -----------
          allow E-Stamp to purchase more than [***] percent ([***]%) of total
          Promotion Impressions for these pages.

3.   LICENSE GRANTS

     3.1. To the extent Content contains or constitutes a trademark, service
          mark, or other similar intellectual property (a "Mark"), E-Stamp
          hereby grants to Microsoft a non-exclusive, non-transferable, royalty-
          free, worldwide right and license to use and display such Mark solely
          for purposes of inclusion of such Mark on the Office Sites to carry
          out the intentions of this Agreement.

     3.2. To the extent that Content contains or constitutes copyrightable or
          copyrighted material, E-Stamp further hereby grants Microsoft a non-
          exclusive, non-transferable, royalty-free, worldwide right and license
          to use, copy, publicly perform, reformat, convert, display, and
          transmit any such Content provided by E-Stamp solely for purposes of
          inclusion of such Content on the Office Sites to carry out the
          intentions of this Agreement. In carrying out its obligations under
          this Agreement, Microsoft shall use the Marks and the Content solely
          in the manner approved by E-Stamp.

4.   OWNERSHIP

     4.1. Except as licensed to Microsoft under the terms of this Agreement, E-
          Stamp retains all right, title, and interest in and to the Content and
          the Marks. Microsoft retains all right, title, and interest in and to
          the Office Websites and any portion thereof, excluding the Content.
          Individual customer information collected by either party on its
          respective Web Sites shall be the sole property of such party and
          shall not be used by the other party for any reason.


[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.

                                       5
<PAGE>

5.   PAYMENT TERMS

     5.1. E-Stamp shall pay to Microsoft US$3,000,000 as follows: E-Stamp shall
          pay to Microsoft US$750,000 within thirty (30) days of the
          commencement of the Term of Promotion, shall pay to Microsoft
          US$750,000 on or before ninety (90) days following the commencement of
          the Term of Promotion; shall pay to Microsoft US$750,000 on or before
          one hundred and eighty (180) days following the commencement of the
          Term of Promotion; and shall pay to Microsoft US$750,000 on or before
          two-hundred and seventy (270) days following the commencement of the
          Term of Promotion.

6.   CONFIDENTIALITY

     6.1. Each party shall keep confidential and not disclose to any third
          party the terms of this Agreement and all non-public information,
          know-how and materials (collectively, "Confidential Information")
          provided by one party to the other pursuant to this Agreement;
          provided, however, that either party may disclose the terms of this
          Agreement (i) in confidence to its immediate legal and financial
          consultants and advisors as required in the ordinary course of such
          party's business, or (ii) as necessary to comply with applicable law
          or stock exchange rules, pursuant to the good faith advice of legal
          counsel (provided that with respect to disclosures to be made in a
          court or regulatory proceeding, the disclosing party shall give notice
          of such process or requirement and give the other party the
          opportunity to file for a protective order). Each party agrees to use
          any Confidential Information provided to it only in its performance
          hereunder.

     6.2. All tangible materials containing Confidential Information
          ("Confidential Materials"), including without limitation documents,
          tapes, computer disks and other fixed storage devices (whether or not
          machine or user readable), are the property of the party making
          disclosure of the Confidential Information contained therein. Upon
          expiration or earlier termination of this Agreement, Confidential
          Materials (and all copies thereof) belonging to one party in the other
          party's possession must be returned or destroyed, at the option of its
          owner. If Confidential Materials are destroyed, a certificate of
          destruction must be provided promptly upon request to their owner.

7.  WARRANTIES

     7.1. E-Stamp Warranties. E-Stamp represents, warrants, and covenants that:
          ------------------

          7.1.1.  E-Stamp has the power and authority to enter into and perform
                  its obligations under this Agreement; and,

          7.1.2.  The Content provided by E-Stamp hereunder is provided in
                  compliance with applicable laws and shall not infringe the
                  copyrights, trademarks, service marks or any other proprietary
                  right of any third party.

     7.2. Microsoft Warranties. Microsoft represents, warrants, and covenants
          --------------------
          that:

          7.2.1.  Microsoft has the power and authority to enter into and
                  perform its obligations under this Agreement; and,

          7.2.2.  The Office Sites provided by Microsoft hereunder are provided
                  in compliance with applicable laws and shall not infringe the
                  copyrights, trademarks, service marks or any other proprietary
                  right of any third party.

8.   INDEMNITY

     8.1. Indemnification by E-Stamp. E-Stamp agrees to indemnify, defend, and
          --------------------------
          hold Microsoft and Microsoft's affiliates, successors, officers,
          directors and employees harmless from any and all actions, causes of
          action, claims, demands, costs, liabilities, expenses (including
          reasonable


                                       6
<PAGE>

          attorneys' fees) and damages arising out of or in connection with any
          claim made by a third party which, if true, would be a breach by E-
          Stamp of its obligations under Section 7 or of any warranty set forth
                                         ---------
          in this Agreement. E-Stamp may request that any or all allegedly
          infringing Content be removed from the Office Sites at its sole
          discretion, and, upon receipt of such request, Microsoft shall use
          commercially reasonable efforts to remove such Content as soon as
          possible.

     8.2. Indemnification by Microsoft. Microsoft agrees to indemnify, defend,
          ----------------------------
          and hold E-Stamp and E-Stamp's successors, officers, directors and
          employees harmless from any and all actions, causes of action, claims,
          demands, costs, liabilities, expenses (including reasonable attorneys'
          fees) and damages arising out of or in connection with any claim made
          by a third party which, if true, would be a breach by Microsoft of its
          obligations under Section 7 or of any warranty set forth in this
                            ---------
          Agreement.


     8.3. Mechanics of Indemnification: Removal of Alleged Infringing Content.
          ----------------------------
          In connection with any claim or action described in this Section 8,
                                                                   ---------
          the party seeking indemnification (i) shall give the indemnifying
          party prompt written notice of the claim, (ii) shall cooperate with
          the indemnifying party (at the indemnifying party's expense) in
          connection with the defense and settlement of the claim, and (iii)
          shall permit the indemnifying party to control the defense and
          settlement of the claim, provided that the indemnifying party may not
          settle the claim without the indemnified party's prior written consent
          (which shall not be unreasonably withheld). Further, the indemnified
          party (at its cost) may participate in the defense and settlement of
          the claim. In the event that Microsoft receives a claim of
          infringement alleging a breach of E-Stamp's obligations under Section
                                                                        -------
          7, Microsoft may, in addition to any other remedies provided for
          -
          herein, immediately remove any or all allegedly infringing Content
          from the Office Sites or any other Microsoft site at its sole
          discretion, pending receipt from E-Stamp of a non-infringing
          replacement link or satisfactory resolution of the claim. Any such
          removal shall not constitute a breach of this Agreement.

9.   TERM AND TERMINATION

     9.1. Term. The term of this Agreement shall commence as of the Effective
          ----
          Date and shall remain in effect until the end of the Term of
          Promotion, at which point the Agreement shall automatically renew,
          subject to the agreement of the parties on modified payment terms and
          number of Impressions. Microsoft agrees to negotiate in good faith
          with E-Stamp to effect such renewal prior to negotiating with any E-
          Stamp Competitor or any other third party for the provision of similar
          services.

     9.2. Termination without Cause. At any time ninety (90) days after the
          Effective Date or later, either party may notify the other of its
          intent to terminate this Agreement in such party's sole discretion
          (i.e., for convenience). The effective date of such termination shall
          be the date that is sixty (60) days from the date that the non-
          terminating party receives written notice of termination from the
          terminating party in accordance with the provisions of Section 11.1.
                                                                 ------------

     9.3. Termination for Cause. Either party may suspend performance and/or
          ---------------------
          terminate this Agreement immediately upon written notice at any time
          in the event of an assignment pursuant to Section 11.6.1, or if the
                                                    --------------
          other party is in material breach of any material warranty, term,
          condition or covenant of this Agreement, and fails to cure that breach
          within thirty (30) days after written notice thereof.

     9.4. Effect of Termination. Neither party shall be liable to the other for
          ---------------------
          damages of any sort resulting solely from terminating this Agreement
          in accordance with its terms; provided, however, that (a) if E-Stamp
          terminates under Section 9.3 for a material breach by Microsoft of the
                           -----------
          Agreement, or (b) if Microsoft terminates under Section 9.2, or (c) if
                                                          -----------
          Microsoft terminates under Section 9.3 because of an assignment by E-
                                     -----------
          Stamp as described in Section 11.6.1, E-Stamp shall be entitled to a
                                --------------
          pro rata reimbursement of fees paid to Microsoft hereunder. Except as
          provided in this Section 9.4,
                           -----------

                                       7
<PAGE>

          Section 2.8.1 or Section 11.6.1, E-Stamp shall not be entitled to any
          -------------    --------------
          reimbursement of fees paid or any reduction in fees owed to Microsoft.
          The parties agree that any portion of fees paid to Microsoft that
          Microsoft retains pursuant to the previous sentence is fair and
          reasonable in connection with the transactions contemplated in this
          Agreement, and that actual damages in such case would be difficult, if
          not impossible, to assess. Termination of this Agreement shall not
          affect any other agreement between the parties, nor shall it affect
          the obligation of E-Stamp to pay Microsoft any amounts that become due
          on or before the effective date of termination.

10.  LIMITATION OF LIABILITIES

     10.1.IN NO EVENT SHALL EITHER PARTY BE LIABLE FOR ANY CONSEQUENTIAL.
          INDIRECT, INCIDENTAL, PUNITIVE OR SPECIAL DAMAGES WHATSOEVER,
          INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS PROFITS.
          BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, AND THE LIKE,
          ARISING OUT OF THIS AGREEMENT, EVEN IN THE EVENT OF FAULT, TORT
          (INCLUDING NEGLIGENCE), STRICT LIABILITY, BREACH OF CONTRACT OR BREACH
          OF WARRANTY AND EVEN IF SUCH PARTY HAS BEEN ADVISED OF THE POSSIBILITY
          OF SUCH DAMAGES.

11.  GENERAL PROVISIONS

     11.1.Notices. All notices and requests in connection with this Agreement
          shall be deemed given as of the date they are received either by
          messenger, delivery service, or in the United States of America mails,
          postage prepaid, certified or registered, return receipt requested,
          and addressed as follows:
<TABLE>
<CAPTION>

          TO E-STAMP:                                 TO MICROSOFT:
<S>                                                   <C>

          E-Stamp                                     Microsoft Corporation
          2855 Campus Drive, Ste. 100                 One Microsoft Way
          San Mateo, CA 94403                         Redmond, WA 98052-6399
          Attention: Robert Ewald, President & CEO    Attention: Group Manager - Office Update
          Phone: (650) 554-8454                       Phone: (425) 882-8080
          Fax: (650) 554-8455                         Fax: (425) 936-7329
          Copy to: Legal                              Copy to: Legal
</TABLE>

          or to such other address as a party may designate pursuant to this
          notice provision.

     11.2.Press Releases. The parties agree to issue a press release concerning
          --------------
          their relationship within ten (10) days of the Effective Date. The
          content of this press release shall be mutually agreed upon by the
          parties prior to release. Neither party shall issue any press release
          or make any public announcement relating in any way whatsoever to this
          Agreement or the relationship established by this Agreement without
          the express prior written consent of the other party, which consent
          shall not be unreasonably withheld.

     11.3.Independent Parties. Nothing in this Agreement shall be construed as
          -------------------
          creating an employer-employee relationship, a partnership, or a joint
          venture between the parties. All persons employed by a party hereto in
          the performance of services hereunder shall be under the sole and
          exclusive direction and control of such party, and for no purpose
          shall they be considered the employees of the other party. Each party
          shall remain an independent contractor and shall be responsible for
          and shall promptly pay all federal, state and local taxes, chargeable
          or assessed with respect to its employees, including but not limited
          to social security, unemployment, federal and state withholding, and
          all other assessed taxes.

     11.4.Governing Law. The laws of the State of Washington shall govern this
          -------------
          Agreement. Each party hereto shall comply, during the Term and at its
          own expense, with all applicable federal, state and

                                       8
<PAGE>

          local laws, rules and regulations which may be applicable to such
          party. Venue shall be exclusively in King County, Washington.

     11.5.Attorneys' Fees. In any action or suit to enforce any right or remedy
          ---------------
          under this Agreement or to interpret any provision of this Agreement,
          the prevailing party shall be entitled to recover its costs, including
          reasonable attorneys' fees.

     11.6.Assignment. This Agreement shall be binding upon and inure to the
          ----------
          benefit of each party's respective successors and lawful assigns;
          provided, however, that neither party may assign its rights under this
          Agreement, in whole or in part, to any third party without the prior
          written approval of the other party. The parties acknowledge that an
          initial public offering of stock by E-Stamp shall not constitute an
          assignment under this Section 11.6.
                                ------------

          11.6.1.      Either party may, however, assign this Agreement (a) by
                    operation of law through a merger or consolidation, or (b)
                    to the purchaser of all or substantially all of such party's
                    business or assets to which this Agreement relates, and may
                    assign this Agreement to one of its majority-owned or
                    controlled subsidiaries if such subsidiary agrees in writing
                    to be bound hereby; provided, however, that in the event of
                    such assignment by E-Stamp under this Section 11.6.1 (y) E-
                                                          --------------
                    Stamp shall remain liable for all of its obligations
                    hereunder notwithstanding the foregoing and (z) Microsoft
                    shall have the right to terminate this Agreement with cause
                    under Section 9.3.
                          -----------

     11.7.Force Majeure. Neither party shall be liable to the other under this
          -------------
          Agreement for any delay or failure to perform its obligations under
          this Agreement if such delay or failure arises from any cause(s)
          beyond such party's reasonable control, including by way of example
          labor disputes, strikes, acts of nature, floods, fire, lightning,
          utility or communications failures, earthquakes, vandalism, war, acts
          of terrorism, riots, insurrections, embargoes, or laws, regulations or
          orders of any governmental entity. Notwithstanding the foregoing, the
          parties shall exercise due diligence to resume performance hereunder
          as soon as commercially possible.

     11.8.Construction. If for any reason a court of competent jurisdiction
          ------------
          finds any of this Agreement, or portion thereof, to be unenforceable,
          that provision of the Agreement shall be enforced to the maximum
          extent permissible so as to effect the intent of the parties, and the
          remainder of this Agreement shall continue in full force and effect.
          Failure by either party to enforce any provision of this Agreement
          shall not be deemed a waiver of future enforcement of that or any
          other provision. The parties and their respective counsel have
          negotiated this Agreement.

     11.9.Headings. The headings used in this Agreement shall be for the
          --------
          convenience of the parties only and shall not be considered in
          interpreting or applying the provisions of this Agreement.

     11.10.  Additional Documents. The parties agree to execute such additional
             --------------------
          documents as may be necessary or desirable for the other party to
          enforce its rights hereunder or otherwise to effectuate the purposes
          of this Agreement.

     11.11.  Execution in Counterparts. This Agreement may be executed in any
             -------------------------
          number of counterparts, each of which when so executed and delivered
          shall be deemed an original, and such counterparts together shall
          constitute one instrument.

     11.12.  Entire Agreement. This Agreement shall not be effective until
             ----------------
          signed by both parties. This Agreement, including the Exhibits,
          constitutes the entire agreement between the parties with respect to
          the subject matter hereof and merges all prior and contemporaneous
          communications. In the event of any inconsistencies between the
          Agreement and the Exhibits attached hereto, the Agreement shall
          control. This Agreement may not be modified except by a written
          agreement signed on behalf of E-Stamp and Microsoft by their
          respective duly authorized representatives.

                                       9
<PAGE>

IN WITNESS WHEREOF, the parties have caused this Agreement to be signed by their
duly authorized representatives as of the dates written below.

MICROSOFT CORPORATION                            E-STAMP, INC.

By: /s/ Jeff Olund                               By: /s/ Robert H. Ewald

Name (print): Jeff Olund                         Name (print): ROBERT H. EWALD

Title: Director                                  Title: PRES. & CEO

Date: 7/14/98                                    Date: 7/8/99

                                       10
<PAGE>

                                   EXHIBIT A

                                 SPECIFICATIONS

Home Page and Product Pages
- ---------------------------

The site home page is expected to be substantially similar to the following
mock-up:

                                [CHART OMITTED]

The large and small promotional areas, and the quicklinks area on the home page
are indicated above.

The Product Pages will follow the same basic layout, and have the same
promotional and quicklink areas.

                                       11
<PAGE>

Services Page
- -------------

The Services Page is expected to be substantially similar to the following mock-
up:

                                [CHART OMITTED]

The Services Page Listing is indicated above.

                                       12
<PAGE>

                                   EXHIBIT B

                                  IMPRESSIONS

B.1. IMPRESSIONS OF QUICKLINKS AND PROMOTIONS

     B.1.1.    [***] Impressions per month delivered from the Home Page, the
               Product Pages, or any combination of these pages. As part of this
               [***] Impressions, Microsoft shall provide:

               B.1.1.1.  [***] QuickLink Impressions per month delivered
                         from the Home Page, the Product Pages, or any
                         combination of these pages.

               B.1.1.2.  [***] Promotion Impressions per month delivered from
                         the Home Page.

               B.1.1.3.  [***] Promotion Impressions per month delivered from
                         the Product Pages.

B.2. IMPRESSIONS OF SERVICES LISTINGS

     B.2.1.  [***] Impressions per month delivered from the Services Page.

     [***]   Confidential treatment has been requested for the bracketed
             portions. The confidential redacted portion has been omitted and
             filed separately with the Securities and Exchange Commission.

                                       13

<PAGE>

                                                                   EXHIBIT 10.14

                  AMERICA ONLINE STRATEGIC MARKETING AGREEMENT


CONTRACT #: ____________________

AOL SALESPERSON: BETH HINTON
SALES COORDINATOR: DOREEN WOO                      CREDIT APPROVAL RECEIVED
DATE: NOVEMBER 13, 1998


                                   ADVERTISER               ADVERTISING AGENCY

Contact Person                     Ellen Perelman
Company Name                       E-Stamp Corporation
Address - Line 1                   4009 Miranda Ave., Suite 225
Address - Line 2                   Palo Alto, CA 94304-1218
Phone #                            650-842-6475
Fax #                              650-843-8078
Email                              [email protected]
SIC Code                                 N/A
Advertiser IAB Category                  N/A
Description of Advertiser's        Online Postal Services
Product/Service

                                   BILLING INFORMATION

Send Invoices to (choose one):     ADVERTISER                    [] Agency
Advertiser or Agency Billing       E-Stamp Accounts Payable
Contact Person                     c/o Kim Funk
Company Name                       E-Stamp Corporation
Billing Address - Line 1           4009 Miranda Ave.
Billing Address - Line 2           Palo Alto, CA 94304-1218
Billing Phone #                    650-842-4605
Billing Fax #                      650-843-8078
Billing Email Address              [email protected]
P.O.#, if applicable


PAYMENT. Advertiser shall make the following payments to AOL:

a.   $50,000 upon execution of this Insertion Order Agreement,

b.   $16,667 within thirty (30) days of the Display Start Date of the Phase I
     Promotions (the "Phase I Launch"), $16,667 within thirty (30) days of the
     one month anniversary of the Phase I Launch and $16,666 within thirty (30)
     days of the two month anniversary of the Phase 1 Launch,

c.   In the event that the Phase I-A Promotions are launched, $50,000 within
     thirty (30) days of the Display Start Date of the Phase 1-A Promotions (the
     "Phase I-A Launch"), $75,000 within thirty (30) days of the one month
     anniversary of the Phase I-A Launch, and $75,000 within thirty (30) days of
     the two month anniversary of the Phase I-A Launch; and

d.   In the event that the Phase II Promotions are launched, $75,000 on the
     Display Start Date of the Phase II Promotions (the "Phase II Launch"),
     $75,000 within thirty (30) days of the one month anniversary of the Phase
     II Launch, $100,000 within thirty (30) days of the two month anniversary of
     the Phase II Launch, and $125,119 within thirty (30) days of each of the
     three month, four month, five month, six month, seven month and eight month
     anniversaries of the Phase II Launch.

e.   Except for the payments that are required pursuant to clause (a) above, at
     least thirty days (30) prior to each of the foregoing due dates, AOL shall
     provide Advertiser with an invoice for each such payment.

LATE PAYMENTS; WIRED PAYMENTS. All amounts owed hereunder not paid when due and
- -----------------------------
payable will bear interest from the date such amounts are due and payable at the
prime rate in effect at such time. With respect to each of the foregoing
payments, if Advertiser does not make such payment within fifteen (15) days
after such payment is due, AOL shall have the right to cease placement of the
Advertisements until such time as payment is made, and if Advertiser does not
make such payment within thirty (30) days after such payment is due, then in
addition to any other remedies AOL may have to enforce the terms of this payment
provision, AOL shall have the right to terminate this Insertion Order Agreement.
All payments required hereunder will be paid in immediately available, non-
refundable U.S. funds wired to the "America Online" account, Account Number
323070752 at The Chase Manhattan Bank, 1 Chase Manhattan Plaza, New York, NY
10081 (ABA: 021000021). If AOL exercises its right to cease placement of the
Advertisements or terminate this Insertion Order Agreement as a result of
Advertiser's non-payment, Advertiser shall be obligated to pay (i) the
specific amounts payable hereunder that are past due at such time as AOL
ceases placement of the Advertisements or terminates this Insertion Order
Agreement, which are attributable to the Impressions delivered by AOL up to
the time of cessation or termination, and (ii) in the event that Advertiser
does not make payment within forty five (45) days of the payment dates
specified above, the specific amounts which become due and payable in the
fifteen (15) day period subsequent to cessation of the Advertisements.

INVENTORY TYPE (CHOOSE ONE):
[] AOL SERVICE ONLY [] AOL AFFILIATE ONLY (E.G.AOL.COM)
 [] AOL SERVICE & AOL AFFILIATE





<PAGE>

                                 AOL SERVICE

                                  INVENTORY
<TABLE>
<CAPTION>
                                           DISPLAY   DISPLAY               # OF AD
AOL INVENTORY/DEMOGRAPHIC*                  START     STOP      AD TYPE     SLOTS      TOTAL GROSS     TOTAL ESTIMATED
PURCHASED                                   DATE      DATE                PURCHASED       PRICE          IMPRESSIONS
<S>                                        <C>       <C>       <C>        <C>          <C>             <C>
PHASE I PROMOTIONS (Please
see Exhibit A, Section 1 for additional
details)

Run of Channel and /or Run of                                  Banners                  $100,000         [***]
Service (as mutually determined             See       See      (234x60)
by the parties) Targeted                  Exhibit   Exhibit   (175 x 45)
Advertisements (targeted by zip              A,        A,
code or other demographic                 Section   Section
variables as mutually agreed                 1         1
upon by AOL and Advertiser)

TOTAL:                                                                                  $100,000         [***]

PHASE I-A PROMOTIONS

Run of Channel and /or Run of                                   Banners                 $200,000         [***]
Service (as mutually determined              See      See       (234x60)
by the parties) Targeted                   Exhibit  Exhibit    (175 x 45)
Advertisements (targeted by zip               A,       A,
code or other demographic                  Section  Section
variables as mutually agreed                  1        1
upon by AOL and Advertiser)


TOTAL                                                                                   $200,000         [***]

PHASE II PROMOTIONS                                              Banner                    N/A            N/A
                                             See      See      (120x60),
Business Services: Postage                 Exhibit  Exhibit    Permanent
category                                      A,       A,      Placement
                                           Section  Section
                                              1        1

Chat: Run of Channel                        "        "        Banner                     $23,903         [***]
      including Targeted                                      (175 x 45)
      (Advertisements as mutually
      agreed upon by the parties
      (targeted by self employed or
      other demographic variables as
      mutually agreed upon by AOL
      and Advertiser))

Mail Center: Main Screen                    "        "        Banner                    $108,427         [***]
      (including Targeted                                      (234 x 60)
      (Advertisements as mutually
      agreed upon by the parties
      (targeted by self employed or
      other demographic variables as
      mutually agreed upon by AOL
      and Advertiser))

Email (including Targeted                     "        "        Banner                   $93,642         [***]
      Advertisements as mutually                               (175 x 45)
      agreed upon by the parties
      (targeted by self employed or
      other demographic variables as
      mutually agreed upon by AOL
      and Advertiser))
</TABLE>

[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.

                                       2
<PAGE>

<TABLE>
<CAPTION>
<S>                                   <C>          <C><C>          <C>         <C>
Travel: Run of Channel                        "        "        Banner                   $230,473         [***]
                                                               (234 x 45)

Personal Finance: Run of                      "        "        Banners                  $230,473         [***]
Channel                                                        (234 x 60)
                                                               (197 x 140)
News: Run of Channel                          "        "        Banner                   $230,474         [***]
                                                               (234 x 60)
Netfind Search Term: Stamp(s)                 "        "        Banner                   $    280         [***]
                                                               (468 x 60)
Netfind Search Term: Mail                     "        "        Banner                   $    480         [***]
                                                               (468 x 60)
Netfind Search Term: Letter(s)                "        "        Banner                   $  2,360         [***]
                                                               (468 x 60)
TOTAL                                                                                    $920,512         [***]

* Attach completed AOL Demographic                                         PHASE I, I-
Profile Worksheet                                                           A, AND II
                                                                             TOTALS:    $1,220,512        [***]
</TABLE>
                              AOL AFFILIATE (Digital City & CompuServe)


                                   Inventory
<TABLE>
<CAPTION>

AOL INVENTORY/DEMOGRAPHIC*                DISPLAY   DISPLAY                 # OF AD        TOTAL      TOTAL
PURCHASED                                  START     STOP      AD TYPE       SLOTS         GROSS   IMPRESSIONS
                                           DATE      DATE                  PURCHASED       PRICE
<S>                                       <C>       <C>       <C>          <C>            <C>      <C>
PHASE II PROMOTIONS

Digital City: Run of Channel               4/1/99   12/30/99   Banners                    $50,200    [***]
                                             or        or     (234 x 60)
                                           7/1/99     4/1/00  (175 x 45)
CompuServe: Business Professional                              Banner                     $30,000    [***]
Pkg.                                                          (234 x 60)

* See attached package description for                                     TOTALS:        $80,200    [***]
any AOL.com package purchases
</TABLE>


[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.


                                       3
<PAGE>

                      Art for Service and All Affiliate

All necessary artwork and active URL's must be provided by advertiser 3 business
                           days prior to start date.

Advertiser will provide the list of zip codes at least 7 business days prior to
                                the start date.

                   ARTWORK REQUIRED FROM ADVERTISER/AGENCY:
                   ----------------------------------------
<TABLE>
<CAPTION>
<S>                           <C>                        <C>
[_] 468x60/10k Max/animation  [_] 234x60/10k Max/static  [_] 197 x 40/10k Max/static
[_] 175 x 45/10k Max/static   [_] 120x60/5k Max/static
</TABLE>

LINKING URL: THE HTTP/URL ADDRESS TO BE CONNECTED TO THE ADVERTISEMENT SHALL BE
______________ (the "Advertiser Site").

                     * STATIC BANNERS ONLY, NO ANIMATION *

                  PLEASE SEND ARTWORK AND URL TO (CHOOSE ONE):

                             [ ] [email protected]
                                 ------------------

                          Advertising Purchase Summary
<TABLE>
<CAPTION>

                                     TOTAL PRICE                  TOTAL IMPRESSIONS                CPM
<S>                           <C>                        <C>                                       <C>
      AOL Networks                    $1,220,512                       [***]                       $29
 Digital City & CompuServe            $   80,200                       [***]                       $36
 Total Purchase  Price          $1,300,712 (subject to      [***] (subject to adjustment as
                              adjustment as provided in     provided in Section 2 of Exhibit A)
                               Section 2 of Exhibit A)
(Less Agency Discount)                    N/A                             N/A

                                  NET PURCHASE PRICE                TOTAL IMPRESSIONS
                                       1,300,712                       [***]                       $29
</TABLE>

IMPRESSIONS COMMITMENT. During the term hereof, AOL will make reasonable efforts
- ----------------------
to deliver Impressions evenly throughout the term. Any guarantees are to
impressions, not "click-throughs." In the event there is (or will be in AOL's
reasonable judgment) a shortfall in Impressions as of the end of a display
period (a "Shortfall"), such Shortfall shall not be considered a breach of this
Insertion Order Agreement by AOL: instead, subject to the reasonable approval of
Advertiser, AOL will provide Advertiser, as its sole remedy, with comparable
"makegood" Impressions through "run of service" advertisement placements on the
AOL Service which have a total value, based on AOL's then-current advertising
rate card, equal to the value of the Shortfall. To the extent Impression
commitments are identified without regard to specific placements, such
placements will be as mutually agreed upon by AOL and Advertiser during the
course of the display period. AOL reserves the right to (i) alter Advertiser
flight dates to accommodate trafficking needs or other operational needs and
(ii) cancel any advertising flight in the event of a material change to the
nature or content of the site linked to the Advertisements. In such cases, AOL
will make available to Advertiser reasonably equivalent flight(s). From time to
time during the term hereof, to the extent that Advertiser shall so desire, AOL
and Advertiser shall mutually agree upon a reallocation of the Advertising
placements provided hereunder (and the equivalent Impressions related to such
placements) (except for permanent placements provided herein). For the purposes
hereof, an "Impression" shall mean a user viewing of the applicable
Advertisement, as reasonably determined and measured by AOL in accordance with
its standard and generally applicable methodologies and protocols.

ADDITIONAL PROVISIONS. This Insertion Order Agreement incorporates by reference
- ---------------------
the provisions of Exhibit A, Exhibit B, Exhibit C and Exhibit D attached hereto,
which contain additional terms and conditions related to the display of the
Advertisements.



[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.


                                       4
<PAGE>

AUTHORIZED SIGNATURES

In order to bind the parties to this Insertion Order Agreement, their duly
authorized representatives have signed their names below on the dates indicated.
This Insertion Order Agreement (including Exhibit A, Exhibit B, Exhibit C and
Exhibit D) shall be binding on both parties when signed on behalf or each party
and delivered to the other party (which delivery may be accomplished by
facsimile transmission of the signature pages hereto).

AOL                                             ADVERTISER



By: /s/ David M. Colburn                        By: /s/ Sunir K. Kapoor
(signature)                                     (signature)

Print Name: DAVID M. COLBURN                    Print Name: SUNIR K. KAPOOR

Title: Svp, BUSINESS AFFAIRS                    Title: PRESIDENT & CEO
(Print or Type)                                 (Print or Type)

Date: 11/17/98                                  Date: 11/30/98

                                       5
<PAGE>

                                   EXHIBIT A
                                   ---------

1.   DISPLAY START/DISPLAY STOP DATES.
     --------------------------------

     a.   Phase I Promotions. The Display Start Date for the Phase I Promotions
          ------------------
          shall be the later to occur of January 1, 1999 or the date on which
          Advertiser provides a notice to AOL containing a representation by
          Advertiser that Advertiser has obtained all necessary permits,
          licenses or other authorizations from the United States Postal Service
          (the "USPS") which permits Advertiser to conduct a beta test of the
          Advertiser Product (the "Authorization Date"), and the Display Stop
          Date shall be three (3) months from the Display Start Date. Provided,
          however, that if the Authorization Date does not occur by February 1,
          1999, AOL shall have the right to terminate this Insertion Order
          Agreement in which event neither party will have any further
          obligation or liability of any kind (other than any liability incurred
          by either party prior to such date) to the other party (including
          without limitation, any obligation to pay any fees hereunder other
          than any payments required to be paid on the execution date hereof).
          In the event that AOL terminates this Insertion Order Agreement
          pursuant to this Section 1(a), AOL shall provide Advertiser with
          Impressions through "run of service" advertisement placements on the
          AOL Service (which placements shall be subject to Advertiser's
          reasonable approval) which have a total value equal to the payments
          required to be paid on the execution date hereof.

     b.   Phase I-A Promotions. Except as otherwise provided in Section 2 of
          ---------------------
          this Exhibit A, the Display Start Date of the Phase I-A Promotions
          shall be the day immediately following the Display Stop Date of the
          Phase I Promotions, and the Display Stop Date shall be three (3)
          months from the Display Start Date.

     c.   Phase II Promotions. Except as otherwise provided in Section 2 of this
          --------------------
          Exhibit A, the Display Start Date of the Phase II Promotions shall be
          the day immediately following the Display Stop Date of either (i) the
          Phase I Promotions or (ii) the Phase I-A Promotions, and the Display
          Stop Date shall be nine (9) months from the Display Start Date.

2.   PHASED ROLL-OUT OF PROMOTIONS. The Advertisements provided hereunder shall
     -----------------------------
     be provided by AOL in accordance with the Insertion Order provided above,
     subject to the following:

     a.   At least thirty (30) days prior to the Phase I Promotions Display Stop
          Date, Advertiser shall provide AOL with a written notice which shall
          contain one or both of the following:

          i.   a representation by Advertiser that Advertiser has obtained all
               necessary permits, licenses or other authorizations from the USPS
               which permits Advertiser to advertise and offer for sale online
               postal services (the "Advertiser Product") over the internet,
               and/or

          ii.  an election by Advertiser to receive either (A) the Phase I-A
               Promotions or (B) the Phase II Promotions. Provided, however,
               that AOL shall not provide the Phase II Promotions unless and
               until Advertiser makes the representation required pursuant to
               Section 2(a)(i) of this Exhibit A. If Advertiser elects to
               receive the Phase II Promotions pursuant to this Section
               2(a)(ii), then the Display Start Date for such Promotions shall
               be the day immediately following the Display Stop Date of the
               Phase I Promotions and the Display Stop Date shall be nine (9)
               months from the Display Start Date.

     b.   In the event that Advertiser notifies AOL that Advertiser wishes to
          receive the Phase 1-A Promotions, (i) at least thirty (30) days prior
          to the Phase I-A Display Stop Date, Advertiser shall provide AOL with
          a written notice containing the representation required pursuant to
          Section 2(a)(i) of this Exhibit A (unless Advertiser is unable to
          provide such representation because it has not received the required
          authorization from the USPS), and in such event, AOL shall provide
          Advertiser with the Phase II Promotions or (ii) if prior to the end of
          the Phase I-A Promotions Advertiser shall receive authorization from
          the USPS to promote and sell the Advertiser Products, Advertiser shall
          provide AOL with a written notice (provided at least fifteen (15) days
          prior to the date on which Advertiser wishes to begin receiving the
          Phase II Promotions), containing (A) the information required pursuant
          to Section 2(a)(i) of this Exhibit A, and (B) an election by
          Advertiser to receive the Phase II Promotions (unless Advertiser is
          unable to provide such representation because it has not received the
          required authorization from the USPS. If Advertiser receives the Phase
          II Promotions pursuant to this Section 2(b)(i), then the Display Start
          Date for such Promotions shall be the day immediately following the
          Display Stop Date of the Phase 1-A Promotions and the Display Stop
          Date shall be nine (9) months from the Display Start Date, and if
          Advertiser receives the Phase II Promotions pursuant to this Section
          2(b)(ii), then the Phase I-A Promotions shall cease fifteen (15) days
          after receipt of the notice by AOL and the Display Start Date for the
          Phase II Promotions shall be the day immediately following the end of
          the Phase I-A Promotions and the Display Stop Date shall be nine (9)
          months from the Display Start Date. Notwithstanding the foregoing, if
          Advertiser does not provide AOL with a written notice containing the
          representations required pursuant to Section 2(a)(i) of this Exhibit A
          at least thirty (30) days prior to the Phase 1-A Display Stop Date,
          AOL shall have the right to immediately terminate this Insertion Order
          Agreement, in which event neither party will have any further
          obligation or liability of any kind (other than any liability incurred
          by either party prior to such date) to the other party (including
          without limitation, any obligation to pay any fees hereunder other
          than any payment obligations due and payable at the time of
          termination).

                                       6
<PAGE>

     c.   Notwithstanding anything otherwise contained herein, if Advertiser is
          unable to, or does not provide AOL with a written notice containing
          the representations required pursuant to Section 2(a)(i) of this
          Exhibit A by June 30, 1999, either party shall have the right to
          terminate this Insertion Order Agreement on no less than thirty (30)
          days written notice to the other party, without any further obligation
          or liability of any kind (other than any liability incurred by either
          party prior to such date) to the other party on account of such
          termination. In the event of such termination, Advertiser shall have
          no further payment obligations under this Insertion Order Agreement
          other than payment obligations due and payable at the time of
          termination.

3.   LAUNCH OF BUSINESS SERVICES: POSTAGE CATEGORY. In the event that AOL
     ---------------------------------------------
     creates and launches the Business Services: Postage Category on the AOL
     Service at any time prior to March 30, 1999, AOL shall provide Advertiser
     with placement in such area at no additional cost to Advertiser.
     Notwithstanding the foregoing, AOL shall not be obligated to provide
     Advertiser with placements in such area prior to January 1, 1999.

4.   CONTENT OF ADVERTISER SITE. The parties hereby expressly acknowledge that
     --------------------------
     Advertiser has purchased the Advertisements for the express purpose of
     promoting the Advertiser Product. Therefore, the Advertisements will only
     promote the Advertiser Product. Additionally, the Advertiser Site will only
     offer the Advertiser Product and content related thereto. Advertiser will
     ensure that except with respect to Advertiser Products sold through or in
     conjunction with the USPS, the standard and/or recurring service fees for
     the Advertiser Products in the Advertiser Site will not exceed the standard
     and/or recurring fees for the Advertiser Products or substantially similar
     products offered or funded by Advertiser through any other online
     distribution channels, nor shall the standard terms and conditions (i.e.,
     terms and conditions that are generally applicable to the Advertiser
     Product and are not specifically created or designed to accompany special
     or promotional offers) on which the Advertiser Products are offered be less
     favorable than the standard terms and conditions on which the Advertiser
     Products or substantially similar products are offered or funded by
     Advertiser through any other online distribution channels. Additionally,
     Advertiser will make reasonable efforts to ensure that traffic from the AOL
     Service is either kept within the Advertiser Site or channeled back into
     the AOL Service. The parties will work together on implementing mutually
     acceptable links from the Advertiser Site back to the AOL Service.

5.   SPECIAL OFFERS/MEMBER BENEFITS. If Advertiser shall offer any promotional
     ------------------------------
     or special offers through any other distribution channels, Advertiser will
     promote at least three (3) special or promotional offers to AOL users
     through the AOL Service (the "Special Offers"). Any Special Offers made
     available by Advertiser shall provide a substantial member benefit to AOL
     users, either by virtue of a meaningful price discount, product
     enhancement, unique service benefit or other special feature, and will be
     no less favorable, in any respect, than any special offers funded solely by
     Advertiser through any other online distribution channels. Advertiser will
     provide AOL with reasonable prior notice of AOL Special Offers so that AOL
     can market the availability of such Special Offers in the manner AOL deems
     appropriate in its editorial discretion.

6.   ADVERTISER PROMOTION OF AOL. Subject to Advertiser's existing contractual
     ----------------------------
     agreements, within each of Advertiser's web sites on the World Wide Web
     portion of the Internet, at the option of AOL, Advertiser shall include the
     following (the "AOL Promo"): (i) a prominent promotional banner or button
     having a size, prominence and placement location as mutually agreed upon by
     the parties to promote such AOL products or services as AOL may designate
     (for example, the America Online(R) brand service, the CompuServe(R) brand
     service, the AOL.com(R) site, any of the Digital City (R) services or the
     AOL Instant Messager TM service); or (ii) a prominent "Try AOL" feature
     having a size, prominence and placement location as mutually agreed upon by
     the parties, through which users can obtain promotional information about
     AOL products or services designated by AOL and, at AOL's option, download
     or order the then-current version of client software for such AOL products
     or services. AOL will provide the creative content to be used in the AOL
     Promos (including designation of links from such content to other content
     pages). Advertiser shall use reasonable efforts to post (or update, as the
     case may be) the creative content supplied by AOL within the space for the
     AOL Promo within five days of its receipt of such content from AOL. Without
     limiting any other reporting obligations of the parties contained herein,
     Advertiser shall provide AOL with monthly written reports specifying the
     number of impressions to the pages containing the AOL Promo during the
     prior month. In the event that AOL elects to serve the AOL Promo to the
     relevant Advertiser web site from an ad server controlled by AOL or its
     agent, Advertiser shall take all reasonable operational steps necessary to
     facilitate such ad serving arrangement including, without limitation,
     inserting HTML code designated by AOL on the pages of the Advertiser web
     site on which the AOL Promo will appear. Advertiser shall be obligated to
     fulfill the provisions of this Section 5 only to the extent that
     Advertiser's compliance does not materially and adversely affect the
     functionality or performance of Advertiser's web sites. To the extent that
     the AOL Promo results in subscribers to the America Online brand service,
     AOL will pay Advertiser a fee equal to AOL's standard bounty fees for
     marketing relationships of this kind.

7.   OPERATING STANDARDS. Advertiser will ensure that the Advertiser Site
     --------------------
     complies at all times with the operating standards attached hereto as
     Exhibit B. In the event Advertiser fails to comply with AOL's operating
     standards, AOL shall notify Advertiser of such non-compliance and AOL will
     have the right to decrease or cease the placement of the Advertisements
     pursuant to this Section 7 solely during such period of non-compliance (and
     in such event, AOL will be relieved of the proportionate amount of any
     Advertisement placement commitments made to Advertiser by AOL hereunder
     corresponding to such decrease in placements). In the event that Advertiser
     is unable to cure such non-compliance within five (5) business days after
     the receipt of notice from AOL, AOL shall have the right to terminate the
     Insertion Order Agreement as its sole remedy for such non-compliance.
     Provided that, (i) to the extent that Advertiser's non-compliance relates
     to its failure to optimize the Advertiser Site to accommodate any "quick
     checkout" tool which AOL may implement, Advertiser shall have sixty (60)
     business days to remedy its non-compliance, and (ii) Advertiser shall not
     be obligated to accommodate any "quick checkout" tool to the extent that
     Advertiser is prohibited by the USPS from doing so. In the event that AOL
     decreases or ceases the placement of Advertisements pursuant to this
     Section 7, Advertiser will be relieved of the proportionate amount of



                                       7
<PAGE>

     the total payments attributable to such Advertisements until such time as
     AOL places such Advertisements, and if AOL terminates this Insertion Order
     Agreement, Advertiser shall not be obligated to make any further payments
     hereunder (except for such payments that are due and owing at the time of
     termination).

8.   BOUNTY. If during the term of this Insertion Order Agreement, customers who
     -------
     purchase the Advertiser Product as a result of the Advertisements and
     remain an active customer of Advertiser for at least three (3) consecutive
     months, as determined and measured by Advertiser in accordance with its
     standard and generally applicable methodologies and protocols, shall exceed
     30,000, in addition to Advertiser's other payment obligations hereunder,
     Advertiser shall pay to AOL $30.00 for each customer in excess of 30,000
     customers.

9.   FUNCTIONALITY OF ADVERTISER PRODUCT. In the event that any Advertiser
     ------------------------------------
     Products (or any software associated therewith) that are promoted and sold
     through the Advertisements result in a poor user experience for a
     significant number of AOL users (e.g., incompatible software, unusable
     software, software which contain bugs or viruses which substantially
     reduces the usability of the Advertiser Product, or software which does not
     perform the functions for which it is advertised), and provided that
     Advertiser does not remedy such poor user experience within fifteen (15)
     days after notice from AOL, AOL shall have the right to terminate this
     Insertion Order Agreement upon thirty (30) days written notice to
     Advertiser.

                                       8
<PAGE>

                                   EXHIBIT B
                                   ---------

                              OPERATING STANDARDS
                              -------------------

1.   Advertiser Site Infrastructure. Advertiser will be responsible for all
     ------------------------------
     communications, hosting and connectivity costs and expenses associated with
     the Advertiser Site. Advertiser will provide all hardware, software,
     telecommunications lines and other infrastructure necessary to meet traffic
     demands on the Advertiser Site from the AOL Network. In the event that
     Advertiser elects to create a custom version of the Advertiser Site in
     order to comply with the terms of this Insertion Order Agreement,
     Advertiser will bear responsibility for all aspects of the implementation,
     management and cost of such mirrored site.

2.   Optimization: Speed. Advertiser will use commercially reasonable efforts to
     -------------------
     ensure that: (a) the functionality and features within the Advertiser Site
     are optimized for the client software then in use by AOL users (including,
     without limitation, any "quick checkout" tool which AOL may implement to
     facilitate purchase of products by AOL users, provided that, prior to
     optimizing the Advertiser Site to accommodate any such "quick checkout"
     tool, the parties shall mutually agree upon the amount of time Advertiser
     will need to perform such optimization); and (b) the Advertiser Site is
     designed and populated in a manner that minimizes delays when AOL users
     attempt to access such site.

3.   User Interface. Advertiser will maintain a graphical user interface within
     --------------
     the Advertiser Site that is competitive in all material respects with
     interfaces of other similar sites based on similar form technology.

4.   Technical Problems. Advertiser agrees to use commercially reasonable
     ------------------
     efforts to address material technical problems (over which Advertiser
     exercises control) affecting use by AOL users of the Advertiser Site (a
     "Advertiser Technical Problem") promptly following notice thereof. In the
     event that Advertiser is unable to promptly resolve a Advertiser Technical
     Problem following notice thereof from AOL (including, without limitation,
     infrastructure deficiencies producing user delays), AOL will have the right
     to regulate the advertisements it provides to Advertiser hereunder until
     such time as Advertiser corrects the Advertiser Technical Problem at issue.

5.   Monitoring. Advertiser will ensure that the performance and availability of
     ----------
     the Advertiser Site is monitored on a continuous basis. Advertiser will
     provide AOL with contact information (including e-mail, phone, pager and
     fax information, as applicable, for both during and after business hours)
     for Advertiser's principal business and technical representatives, for use
     in cases when issues or problems arise with respect to the Advertiser Site.

6.   Security. Advertiser will utilize Internet standard encryption technologies
     --------
     (e.g., Secure Socket Layer - SSL) to provide a secure environment for
     conducting transactions and/or transferring private member information
     (e.g. credit card numbers, banking/financial information, and member
     address information) to and from the Advertiser Site. To the extent that
     Advertiser has access to the Advertiser Site, Advertiser will facilitate
     periodic reviews of the Advertiser Site by AOL in order to evaluate the
     security risks of such site. Advertiser will promptly remedy any security
     risks or breaches of security as may be identified by AOL's Operations
     Security team.

7.   Technical Performance.
     ---------------------

     i.    Advertiser will design the Advertiser Site to support the Windows
           version of the Microsoft Internet Explorer 3.0 and 4.0 browser, and
           make commercially reasonable efforts to support all other AOL
           browsers listed at: "http://webmaster.info.aol.com/BrowTable.html."

     ii.   To the extent Advertiser creates customized pages on the Advertiser
           Site for AOL users, Advertiser will configure the server from which
           it serves the site to examine the HTTP User-Agent field in order to
           identify the "AOL Member-Agents" listed
           at:"http://webmaster.info.aol.com/Brow2Text.html."

     iii.  Advertiser will periodically review the technical information made
           available by AOL at http://webmaster.info.aol.com/CacheText.html.
                               --------------------------------------------

     iv.   Advertiser will design its site to support HTTP 1.0 or later protocol
     --
           as defined in RFC 1945 (available at
           "http://ds.internic.net/rfc/rfc1945.text") and to adhere to AOL's
           parameters for refreshing cached information listed at
           http://webmaster.info.aol.com/CacheText.html.
           --------------------------------------------

     v.    Prior to releasing material, new functionality or features through
           the Advertiser Site ("New Functionality"), Advertiser will use
           commercially reasonable efforts to either (i) test the New
           Functionality to confirm its compatibility with AOL Service client
           software or (ii) provide AOL with written notice of the New
           Functionality so that AOL can perform tests of the New Functionality
           to confirm its compatibility with the AOL Service client software.

10.  AOL Internet Services Advertiser Support. AOL will provide Advertiser with
     ----------------------------------------
access to the standard online resources, standards and guidelines documentation,
technical phone support, monitoring and after-hours assistance that AOL makes
generally available to similarly situated web-based partners. AOL support will
not, in any case, be involved with content creation on behalf of Advertiser or
support for any technologies, databases, software or other applications which
are not supported by AOL or are related to any Advertiser area other than the
Advertiser Site. Support to be provided by AOL is contingent on Advertiser
providing to AOL demo account information (where applicable), a detailed
description of the Advertiser Site's software and hardware and access to the
Advertiser Site for purposes of such performance and load testing as AOL elects
to conduct.

                                       9
<PAGE>

                                   EXHIBIT C
                                   ---------

                 AOL ADVERTISING STANDARD TERMS AND CONDITIONS
                 ---------------------------------------------

1.  Advertising Material/Display. America Online, Inc. ("AOL") shall display as
    ----------------------------
advertisement (the "Advertisement") from Advertiser which conforms to the
specifications set forth in the applicable Insertion Order Agreement which has
been executed by AOL and Advertiser (the "Insertion Order," and, collectively
with these Standard Terms and Conditions, the "Insertion Order Agreement")
through the standard narrowband U.S.-based America Online(R) brand service
(excluding any sub-products, sub-services or third party areas which may be
offered therein) or such other U.S.-based AOL property as may be expressly
described as the site for placement in the Insertion Order (the "AOL Service").
Subject to Advertiser's reasonable prior written approval, AOL will have the
right to fulfill its promotional commitments with respect to the Advertisements
by providing Advertiser with comparable placements of the Advertisements in
alternative areas of the AOL Service. Except as expressly provided in the
Insertion Order, the specific nature and positioning of the Advertisement will
be as determined by AOL in its editorial discretion. Advertiser agrees that (i)
AOL has the right to market, display, perform, transmit and promote the
Advertisement through the AOL Service and (ii) users of the AOL Service have the
right to access and use the Advertisement together with any content or materials
linked to the Advertisement (the "Advertiser Content"). The Advertiser Content
will not (i) disparage AOL; (ii) promote any product or service which is
reasonably competitive with one or more of the principal products or services
offered through AOL's products and services ("Competitive Products") on the AOL
Service or on any page on the Advertiser Site that is linked directly to the
Advertisements; (iii) be in contravention of AOL's written, generally applicable
advertising standards and practices, as such may be modified by AOL from time to
time; or (iv) violate any applicable law, regulation or third party right
(including, without limitation, any copyright, trademark, patent or other
proprietary right). Additionally, Advertiser shall consistently update the
Advertiser Content and will review, delete, edit, create, update and otherwise
manage such content in accordance with the terms of this Insertion Order
Agreement. In no event shall the Advertisement or the linked area state or imply
that (i) the Advertisement was placed by AOL or (ii) that AOL endorses
Advertiser's products or services. To the extent AOL notifies Advertiser of
reasonable complaints or concerns (e.g., from an AOL member) regarding the
Advertiser Content or any other content or materials linked thereto or
associated therewith ("Objectionable Content"), Advertiser will, to the extent
such Objectionable Content is within Advertiser's control, use commercially
reasonable efforts to respond in good faith to such complaints or concerns. AOL
may alter or shorten the flight dates set forth in the Insertion Order if
advertising materials required per the Insertion Order are not provided in a
timely manner, and Advertiser shall not be entitled to any refund or proration
for delays caused by Advertiser's failure to deliver such materials.

2.  Operations. Unless expressly provided for elsewhere in this Insertion Order
    ----------
Agreement, AOL will have no obligation to provide any creative, design,
technical or production services to Advertiser ("Services"). Delivery by AOL of
any such Services shall be subject to (i) AOL's availability to perform the
requested work, (ii) execution by both parties of a separate work order
specifically outlining the Services to be provided and the fees to be paid by
Advertiser for such Services and (iii) payment in advance by Advertiser of such
fees. AOL will be entitled to discontinue links to Advertiser Content to the
extent such Advertiser Content will, in AOL's good faith judgment, adversely
affect the operations of the AOL Service. Advertiser will bear full
responsibility for all customer service, including without limitation, order
processing, billing, fulfillment, shipment, collection and other customer
support associated with any products or services offered, sold or licensed
through Advertiser's site, and AOL will have no obligations whatsoever with
respect thereto. Advertiser will take all steps necessary to ensure that any
contest, sweepstakes or similar promotion conducted or promoted through the
Advertiser Content complies with all applicable federal, state and local laws
and regulations.

3.  Search Terms/Keywords. To the extent Advertiser is purchasing an
    ----------------------
Advertisement related to an Internet-based "search" term, Advertiser represents
and warrants that Advertiser has the legal rights necessary to utilize such
search term in connection with the Advertisement. Any "keyword" terms for
navigation from within the proprietary America Online brand service ("AOL
Keyword Terms") (as contrasted to Internet-based search terms) which may be made
available to Advertiser shall be (i) subject to availability and (ii) limited to
the combination of the keyword modifier combined with a registered trademark of
Advertiser. AOL reserves the right to revoke at any time Advertiser's use of any
AOL Keyword Terms which do not Incorporate registered trademarks of Advertiser.
Advertiser acknowledges that its utilization of any AOL Keyword Term will not
create in it, nor will it represent it has, any right, title or interest in or
to such AOL Keyword Term, other than the right, title and interest Advertiser
holds in Advertiser's registered trademark independent of the AOL Keyword Term.

4.  Payment: Cancellation. The Advertiser agrees to pay AOL for all advertising
    ---------------------
displayed in accordance with the agreed upon amounts and billing schedule shown
on the relevant Insertion Order. Advertising packages are nonrefundable or
proratable except to the extent otherwise expressly contemplated hereunder.
Should AOL fall to display the Advertisements in accordance with the Insertion
Order due to Advertiser's failure to comply with any requirement of this
Insertion Order Agreement, (other than the payment provision of the Insertion
Order, Sections 1, 2(b) and 2(c) of Exhibit A and the provisions of Exhibit B)
Advertiser will remain liable for the full amount indicated on the Insertion
Order. AOL reserves the right to redesign or modify the organization, structure,
"look and feel" and other elements of the AOL Service at its sole discretion at
any time without prior notice. In the event such modifications will materially
and adversely affect the placement of the Advertisement, AOL will work with
Advertiser to display the Advertisement in a comparable location and manner that
is reasonably satisfactory to Advertiser. If AOL and Advertiser cannot reach
agreement on a substitute placement, Advertiser shall have the right to cancel
the Advertisement, upon thirty (30) days advance written notice to AOL. In such
case, Advertiser will only be responsible

                                       10
<PAGE>

for the pro-rata portion of payments attributable to the period from the
commencement of this Insertion Order Agreement through the effectiveness of such
cancellation (the "Pro Rata Payments"). AOL reserves the right to cancel and
remove at any time any Advertisement in the event that AOL believes in good
faith that further display of the Advertisement will expose AOL to liability or
other adverse consequences. In the event of such a cancellation, Advertiser will
only be responsible for the Pro-Rata Payments. Advertiser may not resell, trade,
exchange, barter or broker to any third-party any advertising space which is the
subject of this Insertion Order Agreement.

5.    Usage Data. a. AOL will provide Advertiser with such usage information and
      ----------
reports related to the Advertisement in substance and form determined by AOL,
consistent with its then-standard reporting practices (including information
related to Impressions delivery and click-throughs) as AOL generally makes
available to other advertisers that are similar to Advertiser. Advertiser may
not distribute or disclose usage information to any third party without AOL's
prior written consent.

b.    Advertiser will provide AOL with a monthly report which contains the
screenname of all AOL users who purchase Advertiser Products during the prior
month.

6.    Limitation of Liability; Disclaimer; Indemnification.
      ----------------------------------------------------

 (A)  SUBJECT TO SECTIONS 6(D) AND (E) BELOW, UNDER NO CIRCUMSTANCES SHALL
EITHER PARTY BE LIABLE TO THE OTHER FOR INDIRECT, INCIDENTAL, CONSEQUENTIAL,
SPECIAL OR EXEMPLARY DAMAGES (EVEN IF SUCH PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES), ARISING FROM ANY ASPECT OF THE ADVERTISING
RELATIONSHIP PROVIDED FOR HEREIN. IN NO EVENT SHALL EITHER PARTY BE LIABLE TO
THE OTHER PARTY UNDER THIS INSERTION ORDER AGREEMENT FOR MORE THAN THE AMOUNT TO
BE PAID BY ADVERTISER DURING THE YEAR IN WHICH THE LIABILITY ACCRUES.

 (B)  AOL MAKES NO AND HEREBY SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS OR
WARRANTIES, EXPRESS OR IMPLIED, REGARDING THE AOL SERVICE OR ANY PORTION
THEREOF, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE AND IMPLIED WARRANTIES ARISING FROM COURSE OF DEALING OR
COURSE OF PERFORMANCE. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, AOL
SPECIFICALLY DISCLAIMS ANY WARRANTY REGARDING (I) THE NUMBER OF PERSONS WHO WILL
ACCESS THE ADVERTISER CONTENT OR "CLICK-THROUGH" THE ADVERTISEMENT, (II) ANY
BENEFIT ADVERTISER MIGHT OBTAIN FROM INCLUDING THE ADVERTISEMENT WITHIN THE AOL
SERVICE AND (III) THE FUNCTIONALITY, PERFORMANCE OR OPERATION OF THE AOL SERVICE
WITH RESPECT TO THE ADVERTISEMENT.

 (C)  ADVERTISER MAKES NO AND HEREBY SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS
OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THE ADVERTISER SITE OR ANY PORTION
THEREOF, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE AND IMPLIED WARRANTIES ARISING FROM COURSE OF DEALING OR
COURSE OF PERFORMANCE. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING,
ADVERTISER SPECIFICALLY DISLAIMS ANY WARRANTY REGARDING (I) THE NUMBER OF
PERSONS WHO WILL ACCESS THE AOL SERVICE OR "CLICK-THROUGH' THE AOL PROMOS, (II)
ANY BENEFIT AOL MIGHT OBTAIN FROM INCLUDING THE AOL PROMO WITHIN THE ADVERTISER
SITE AND (III) THE FUNCTIONALITY, PERFORMANCE OR OPERATION OF THE ADVERTISER
SITE WITH RESPECT TO THE AOL PROMO.

 (D)  Advertiser hereby agrees to indemnify, defend and hold harmless AOL and
the officers, directors, agents, affiliates, distributors, franchises and
employees of AOL from and against all claims, actions, liabilities, losses,
expenses, damages and costs (including, without limitation, reasonable
attorneys' fees) that may at any time be incurred by any of them by reason of
any third party claims, suits or proceedings: (a) for libel, defamation,
violation of right of privacy or publicity, copyright infringement, trademark
infringement or other infringement of any third party right, fraud, false
advertising, misrepresentation, product liability or violation of any law,
statute, ordinance, rule or regulation throughout the world in connection with
the Advertisement or Advertiser Content; (b) arising out of any material breach
by Advertiser of any duty, representation or warranty under this Insertion Order
Agreement; or (c) relating to any contaminated file, virus, worm or Trojan horse
originating from the Advertisement or Advertiser Content. AOL will notify
Advertiser of any claim, action or demand (an "Action") for which indemnity is
claimed. Advertiser's counsel defending such Action shall be subject to AOL's
prior written approval. AOL reserves the right to participate fully in and
assume joint control of the defense of any Action. Settlement of any Action
shall be subject to AOL's prior written approval. This section will survive the
completion, expiration, termination or cancellation of this Insertion Order
Agreement.

 (E)  AOL hereby agrees to indemnify, defend and hold harmless Advertiser and
the officers, directors, agents, affiliates, distributors, franchises and
employees of Advertiser from and against all claims, actions, liabilities,
losses, expenses, damages and costs (including, without limitation, reasonable
attorneys' fees) that may at any time be incurred by any of them by reason of
any third party claims, suits or proceedings; (a) for libel, defamation,
violation of right of privacy or publicity, copyright infringement, trademark,
infringement of any third party right, fraud, false advertising,
misrepresentation, product liability or violation of any law, statute,
ordinance, rule or regulation throughout the world in connection with the AOL
Promo; (b) arising out of any material breach by AOL of any duty, representation
or warranty under this Insertion Order Agreement; or (c) relating to any
contaminated file, virus, worm or Trojan horse originating from the AOL Promo.
Advertiser will notify AOL of any Action for which indemnity is claimed. AOL's
counsel defending such Action shall be subject to Advertiser's prior written
approval. Advertiser reserves the right to participate fully in and assume joint
control of the defense of any Action. Settlement of any Action shall be subject
to Advertiser's prior written approval. This section will survive the
completion, expiration termination or cancellation of this Insertion Order
Agreement.

7.  Solicitation. (a) Advertiser will not send unsolicited, commercial e-mail
    ------------
(i.e., "spam") through or into AOL's products or services, absent a prior
business relationship, and will comply with any other standard AOL policies and
limitations relating to distribution of bulk e-mail solicitations or
communications through or into AOL's products and services (including, without
limitation, the requirement that Advertiser

                                       11
<PAGE>

provide a prominent and easy means for the recipient to "opt-out" of receiving
any future commercial e-mail communications from Advertiser. Advertiser will not
use the Advertisement or any other aspect of AOL's products or services to
promote or solicit on behalf of a Competitive Product.

 (b)  Advertiser shall ensure that its collection, use and disclosure of
information obtained from AOL members under this Insertion Order Agreement
("Member Information") complies with (i) all applicable laws and regulations and
(ii) AOL's standard privacy policies, available on the AOL Service at the
keyword term "Privacy" (or, in the case of Advertiser's site, Advertiser's
standard privacy policies so long as such policies are prominently published on
the site and provide adequate notice, disclosure and choice to users regarding
Advertiser's collection, use and disclosure of user information).

 (c)  Each Information Request shall clearly and conspicuously specify to the
AOL members at issue the purpose for which specific information related to such
members ("Member Information") collected by Advertiser shall be used (the
"Specified Purpose"). Advertiser shall limit use of the Member Information
collected through an Information Request to the Specified Purpose. In the case
of AOL members who purchase products or services from Advertiser, Advertiser
will be entitled to incorporate such members into Advertiser's aggregate lists
of customers; provided that Advertiser in no way: (i) discloses Member
Information in a manner that identifies AOL members as end-users of an AOL
product or service (or in any other manner that could reasonably be expected to
facilitate use of such information by or on behalf of a Competitive Product); or
(ii) otherwise uses such Member Information in connection with marketing of a
Competitive Product. This section shall survive the completion, expiration,
termination or cancellation of this Insertion Order Agreement.

8.    Miscellaneous. The parties to this Insertion Order Agreement are
      -------------
independent contractors. Neither party is an agent, representative or partner of
the other party. Neither party shall have any right, power or authority to enter
into any agreement for or on behalf of, or incur any obligation or liability of,
or to otherwise bind, the other party. The failure of either party to insist
upon or enforce strict performance by the other party of any provision of this
Insertion Order Agreement or to exercise any right under this Insertion Order
Agreement shall not be construed as a waiver or relinquishment to any extent of
such party's right to assert or rely upon any such provision or right in that or
any other instance. Except where otherwise specified herein or in the Insertion
Order, the rights and remedies granted to a party under this Insertion Order
Agreement are cumulative and in addition to, and not in lieu of, any other
rights or remedies which the party may possess at law or in equity. Except as
otherwise agreed upon by the parties, Advertiser shall not issue any press
releases or public statements concerning the existence or terms of this
Insertion Order Agreement. Neither party shall use, display or modify the other
party's trademarks in any manner absent the other party's express prior written
approval. Either party may terminate this Insertion Order Agreement (a) at any
time with written notice to the other party in the event of a material breach of
this Insertion Order Agreement by the other party, which remains uncured after
thirty days written notice thereof; and (b) immediately following written notice
to the other party if the other party (1) ceases to do business in the normal
course, (2) becomes or is declared insolvent or bankrupt, (3) is the subject of
any proceeding related to its liquidation or insolvency (whether voluntary or
involuntary) which is not dismissed within ninety (90) calendar days or (4)
makes an assignment for the benefit of creditors. Additionally, in the event of
a change of control of Advertiser (other than as part of an initial public
offering), AOL may terminate this Insertion Order Agreement by providing thirty
(30) days prior written notice of such intent to terminate. In the event that
AOL terminates this Insertion Order Agreement as a result of a change of
control, Advertiser shall have no further payment obligations hereunder, other
than payment obligations due and payable at the time of termination. This
Insertion Order Agreement sets forth the entire agreement between Advertiser and
AOL, and supersedes any and all prior agreements of AOL or Advertiser with
respect to the transactions set forth herein. No change, amendment or
modification of any provision of this Insertion Order Agreement shall be valid
unless set forth in a written instrument signed by the party subject to
enforcement of such amendment. Advertiser shall not assign this Insertion Order
Agreement or any right, interest or benefit under this Insertion Order Agreement
without the prior written consent of AOL, which consent will not be unreasonably
withheld. Assumption of this Insertion Order Agreement by any successor to
Advertiser (including, without limitation, by way of merger or consolidation)
shall be subject to AOL's prior written approval. Subject to the foregoing, this
Insertion Order Agreement shall be fully binding upon, inure to the benefit of
and be enforceable by the parties hereto and their respective successors and
assigns. In the event that any provision of this Insertion Order Agreement is
held invalid by a court with jurisdiction over the Parties to this Insertion
Order Agreement, (i) such provision shall be deemed to be restated to reflect as
nearly as possible the original intentions of the Parties in accordance with
applicable law and (ii) the remaining terms, provisions, covenants and
restrictions of this Insertion Order Agreement shall remain in full force and
effect. This Insertion Order Agreement may be executed in counterparts, each of
which shall be deemed an original and all of which together shall constitute one
and the same document. This Insertion Order Agreement shall be interpreted,
construed and enforced in all respects in accordance with the laws of the
Commonwealth of Virginia, except for its conflicts of laws principles.
Advertiser hereby irrevocably consents to the exclusive jurisdiction of the
courts of the Commonwealth of Virginia and the federal courts situated in the
Commonwealth of Virginia in connection with any action arising under this
Insertion Order Agreement.

                                       12
<PAGE>

                                   EXHIBIT D
                                   ---------

               DESCRIPTION OF BUSINESS SERVICE: POSTAGE CATEGORY
               -------------------------------------------------

The Postage Category will be located within the Business Services area of the
AOL Service. The Postage Category will be structured similarly to what is
outlined below to create a marketplace/directory resource for AOL SOHO members:

1)   Directory listing of category providers
2)   Content/programming highlights related to news/noteworthy category
     information
3)   Branded buttons for premier category partners
4)   468x60 banner for premier category partners
5)   Links to other business services
6)   Business perk features: highlighting great deals/business opportunities
7)   Links to relevant professional areas (forums/mini-channels)

Advertiser hereby acknowledges that the foregoing represents a general
description of the Business Services: Postage Category and is not intended to be
dispositive of the final product as created on the AOL Service. AOL reserves the
right to modify the foregoing description in its editorial discretion.

                                       13

<PAGE>

                                                                   EXHIBIT 10.15

          E-Stamp Corporation/Modus Media Turnkey/Inventory Agreement
          -----------------------------------------------------------

Parties:
This Turnkey/Inventory Agreement ("the Agreement") is made and entered into
between E-Stamp Corporation ("E-Stamp") 4009 Miranda Avenue, Suite 225, Palo
Alto, Ca. 94304 and Modus Media International ("Modus Media"), 690 Canton
Street, Westwood, MA 02090.

Purpose:
To define the terms by which Modus Media shall manufacture, warehouse and ship
software Finished Goods for E-Stamp Corporation.

Section A: Deliverables Requirements
- ------------------------------------

Forecasts:
E-Stamp's requirements typically call for shipment of product in a time frame
that is shorter than the time which the required components can ordinarily be
procured or produced to order.  Therefore, Modus Media will use E-Stamp-
generated forecasts as a basis for component and raw material procurement or
production scheduling. E-Stamp agrees to provide Modus Media a 90 day
rolling forecast in 30 day buckets on the second Friday of the month prior
to the beginning of the 90 days reflected in the forecast. Should E-Stamp
fail to timely submit a forecast, Modus Media shall contact E-Stamp and
request the forecast. The forecast will be sent in an agreed to electronic
format, which may take the form of purchase orders or electronic mail
messages. Materials (components and raw materials) will be purchased by Modus
Media on E-Stamp's behalf, according to a forecast and purchase order provided
by E-Stamp, using a net MRP process. This process will include a determination
by Modus Media of an economic order quantity based upon either the month's
forecast quantity, or a maximum of the ninety days forecast requirements less
on hand balance. Authorization for procurement of this quantity is granted to
Modus Media by E-Stamp as long as the quantity to be procured is less than or
equal to the demand shown in the forecast.

Service Commitment:
Modus Media shall provide the services as set forth on Addendum A (Scope of Work
- - SOW).  Modus Media shall ship products on the same day as orders are received
from E-Stamp, providing orders are supplied by E-Stamp by the deadlines
indicated in the SOW.  A ship confirmation file will be sent each day for the
prior days' shipments.

Cancellations:
Should E-Stamp decide to cancel purchase orders, forecasts, or deliveries,
discontinue work, or reduce total quantities, E-Stamp agrees to give Modus Media
written notice, in the form of a purchase change order or electronic mail.  In
addition, E-Stamp agrees to pay Modus Media, as set forth below, for any
materials and labor, at Modus Media's cost, for work completed; for all work
procured; also for all work in process as of the date and time Modus Media
receives notification of cancellation or change.  This payment may include
extraordinary costs actually incurred by Modus Media, including but not limited
to extraordinary administrative expenses and shall not be unreasonable.  Modus
Media agrees to work in good faith to limit the potential chargeable costs by
rescheduling procurement of components, deliveries, and manufacturing and
assembly as long as is

<PAGE>

reasonably possible and cost effective. Interrupted but completed work and non-
standard material which cannot be utilized may be invoiced in normal billing
cycles once E-Stamp has been so advised. E-Stamp agrees to provide a revised
Purchase Order for the work completed at the time of cancellation.

Quality Standard:
Modus Media warrants that its services performed and materials requested
hereunder will meet the criteria set forth in the Modus Media International
Standard Attributes Manual and the SOW, attached hereto as Addendum C.

Section B:  Procurement, Manufacturing and Inventory
- ----------------------------------------------------

Component and Raw Material Procurement:
Modus Media will produce or procure components and raw material in accordance
with Section A, "Forecast", and retain ownership of these components on E-
Stamp's behalf as set forth herein.  E-Stamp agrees to purchase or dispose of
all such components and raw materials in accordance with the terms and
conditions set forth in this Agreement.  Modus Media agrees it shall not dispose
of nor sell such raw material components to others, without E-Stamp's prior
written consent.  In no event will Modus Media procure or charge E-Stamp for
unauthorized components or raw materials inventory.  Only material which is of a
quality suitable for its original use may be classified as excess or obsolete.

Excess Material:
Modus Media will provide a monthly inventory report which will provide aging
information by raw material component.  Any raw materials not made into finished
goods after 90 days will be subject to the storage charges set forth on Addendum
B (Pricing).  Should any raw materials not be made into Finished Goods within
180 days, at the end of 180 days, at the request of Modus Media, E-Stamp will
purchase any remaining raw material and component inventory and authorize Modus
Media to scrap the product, ship it to E-Stamp, or to continue to store at the
storage charges set forth on the Addendum B.  E-Stamp's purchase of such Excess
Material will be charged at cost plus markup, as set forth on Addendum B.  A
scrapping fee, if applicable, will be determined on a case by case basis
depending on circumstances.  The scrapping fee shall be reduced or waived if
Modus Media retains recycling benefit of scrapped materials.  Modus Media
reserves the right to charge E-Stamp for "cost of money" invested in raw
materials stored for more than ninety (90) days.  Addendum B sets forth
applicable storage, and "cost of money" charges.

Manufacturing:
E-Stamp will provide a Purchase Order authorizing Modus Media to build products
according to E-Stamp's forecast.  Blanket Purchase Orders will be issued to
cover the turnkey manufacturing.  Separate POs will be issued for non-routine
events and will be consistent with the prices set forth on Addendum B.  Purchase
Orders may be delivered in hard copy, fax, electronic mail, or via EDI message.

E-Stamp will provide a Purchase Order at the end of each month for the following
month's production, which shall be based on E-Stamp's 90 day rolling forecast.


                                      -2-
<PAGE>

Changes in quantities, manufacturing specifications supplied by E-Stamp or
delivery schedules may result in price adjustments and production schedule
changes in accordance with the terms of this Agreement.  Modus Media will make
every effort to maintain price consistency and reduce purchase price variance
for E-Stamp in these situations.

Media Replication:
For work involving CD-ROM replication, all input files, CD-Rs or compact discs
furnished by E-Stamp will be used solely for E-Stamp's work and remain E-Stamp's
property.  All tooling, including masters, stampers or any other tooling made by
Modus Media will be used solely for E-Stamp work but will remain Modus Media
property.

Finished Goods Inventory:
E-Stamp will purchase all Finished Goods inventory upon completion of
manufacturing.  Storage of Finished Goods will be charged as set forth in
Addendum B.  Modus Media will provide a costed inventory report each month that
will show the previous month end inventory.

Inventory Reports and Shrinkage:
Modus Media will provide inventory and inventory adjustment reports to E-Stamp
for both Component and Finished Goods Inventory.

Section C:  Pricing of Materials
- --------------------------------

Pricing of materials and services are set forth on the Addendum B to this
Agreement.

Component and raw material pricing set forth on the Addendum B are subject to
changes in market prices.  Modus Media will notify E-Stamp of any change in
component or raw materials pricing that exceeds plus or minus 5%, and change
pricing to reflect such changes at the next periodic pricing review.  If a
change in forecast quantity for a component results in a change in price of more
than 10% (+/-) for that component, the price will be changed on that component
at that time of change.

Storage fees for less than 90 days raw materials and components will be included
in the kit pricing.

If overtime is required, Modus Media will so advise E-Stamp of such charges and
obtain prior consent from E-Stamp.  Working standard Modus Media holidays, at E-
Stamp's request, will be billed on an overtime basis, as incurred.  Overtime
rates will be quoted and agreed upon by both parties before overtime work
begins.

Pricing Methodology: Assembly
All assembly work will be charged a flat per touch rate according to how many
touches per component.

Media Replication:
CD prices are included in Addendum B.

Make ready/Staging Fee:
This charge is reflected in Addendum B.

                                      -3-
<PAGE>

Palletization/Materials Fee:
Materials for pallets, corrugated protection, corner-boards and stretch wrapping
are included in Addendum B.

Project Management:

A project management fee will be charged on a per kit basis which includes the
following services:

The management fee is detailed in the pricing section found in Addendum B.

               Job Engineering                Order Processing
               Local Interplant Freight       Dedicated Resources
               Inventory Management           Account Management
               Transaction Reporting          First Article Inspection

Procured Parts (supplier Specified):
All procured components will be marked-up at the rates provided in Addendum B.

Invoicing
Modus Media International shall submit an invoice to E-Stamp Corporation for
each shipment, or partial shipment of products, components or provision of
services.  Invoices will be generated when product is moved into Finished Goods
and when an order is built to ship for bulk distribution.  Fulfillment invoices
from Modus Media International will summarize monthly fulfillment charges and
provide detailed accountability broken down by each Sales Order shipped.

Film, Digital Files, and Plates:
All platemaking film made by Modus Media used solely for E-Stamp's work will
become E-Stamp's property upon payment of invoices.  All film or electronic
files furnished by E-Stamp used solely for E-Stamp's work will remain E-Stamp's
property.  All plates made by Modus Media used solely for E-Stamp's work will
remain Modus Media's property.  All electronic imposition files Modus Media
makes from E-Stamp's furnished digital files, all type fonts used for the
production of E-Stamp's work, any storage devices, disks, etc. used to archive
E-Stamp's files and any proprietary software, systems or technology used to
process E-Stamp's files will remain Modus Media property.  Modus Media agrees
not to use any film, digital files or plates made on behalf of E-Stamp for any
other purpose other than what has been previously agreed to by E-Stamp.

RMA Service
Please see Addendum A for specific RMA procedure requirements.

Other Pricing:
All relevant pricing for other services is included in Addendum B.  Any other
pricing for any other services will be provided upon request.

Terms of Payment, Interest, Collection Costs, and Billing Disputes
Term of Payment is defined as Net 30 from date of invoice.  Should any invoice
issued hereunder become past due in excess of 60 days, E-Stamp agrees to pay
interest at the rate of one and one-half percent (1.5%) per month, or the lawful
limit if less, on all such amounts excluding any amounts that E-Stamp is
currently disputing with Modus Media, commencing fifteen (15) days after written
notice

                                      -4-
<PAGE>

to E-Stamp as well as all the costs of collection of overdue accounts, if any,
including, but not limited to, reasonable attorney's fees. Interest payable will
be calculated from the invoice due date to the date payment is received. Should
any portion of an invoice be disputed, E-Stamp agrees to pay the undisputed
portion according to its terms and E-Stamp will notify Modus Media promptly of
the dispute. Both parties agree to use their best efforts to resolve the
disputed portion of the invoice within thirty (30) days of learning of the
dispute.

Bankruptcy
If either party shall be adjudicated a bankrupt, institute voluntary proceedings
for bankruptcy or reorganization, make an assignment for the benefit of its
creditors, apply for or consent to the appointment of a receiver for it or its
property, or admit in writing its inability to pay its debts as they become due,
the other party may terminate this Agreement by written notice.  Any such
termination will not relieve either party from any accrued obligations
thereunder.

Limitation of Liability
Modus Media will perform the work in a good and workmanlike manner and in
accordance with the specifications and production schedule.  In no event will
either party be liable to the other for special, incidental or consequential
damages, including, but not limited to, lost profits or business.  Modus Media's
liability shall be limited to the total payments actually received under this
agreement.

Responsibility for Subject Matter
In furnishing Modus Media with matter to reproduce, or distribute, or to have
incorporated in the completed product, E-Stamp represents and warrants that none
of such matter infringes any copyright or other rights of a third party (either
as furnished to Modus Media by E-Stamp or as altered by Modus Media at E-Stamp's
direction), or patent, is libelous, or otherwise violates the rights of or will
cause damage or injury to other persons E-Stamp agrees to indemnify and save
Modus Media harmless from all losses, damages and expenses, including attorneys'
fees, which Modus Media may suffer as the result of any claim of such violation,
damage, or injury.

Work Stoppages
Modus Media will not be liable for delays or non-performance of this Agreement
occasioned by strikes, fires, accidents, or by causes beyond Modus Media's
control including, but not limited to, the inability to obtain necessary
materials or utilities.  In the event of a stoppage or delay resulting from any
such cause, Modus Media will perform such parts of the work as Modus Media is
capable of performing.  In the event E-Stamp places any other part of the work
elsewhere, E-Stamp agrees to allow Modus to resume the work as promptly as
practical.

Insurance:
Modus Media will carry, at its own expense, fire, sprinkler leakage and extended
coverage insurance, subject to the usual exclusions, limitations, and conditions
of such policies on the actual cash value of all Modus Media materials, work in
process, and all Finished Goods completed and not shipped, and on the actual
cash value of all positives, copy, artwork, paper and other materials finished
by E-Stamp while in Modus Media's care, custody and control.  If E-Stamp's
property is damaged as a result of an insured peril under the applicable
insurance policy, then, at Modus Media's option with the concurrence of E-Stamp,
will replace E-Stamp's damaged property or reimburse E-Stamp for the actual cash
value of the damaged property.  If Modus Media elects to reimburse

                                      -5-
<PAGE>

E-Stamp for the damaged property's actual cash value, the amount payable to E-
Stamp shall be limited to the proceeds of such policy plus any related
deductible, if any, applied to the claim for damage to E-Stamp's property. For
positives and other media Modus Media's insurance coverage and liability shall
be limited to the cost of blank film or other media and the cost of duplication
from an original or other copy.

Passing of Title:
Title and possession will pass to E-Stamp upon delivery into finished goods or
upon date of final invoicing, whichever is earlier.

Governing Law:
The laws of each state where the goods and services are performed will govern
this Agreement.

Section D:  General Terms
- -------------------------

Term:
The term of this agreement is from December 1, 1998 through December 31, 1999.
The parties agree to negotiate toward a new agreement prior to the end date.
Standard pricing will be reviewed semi-annually.

Termination:
This agreement may be terminated by either party with 90 calendar days written
notice to the other.  Upon termination or expiration of this Agreement, the
parties will agree upon disposition of all raw material, work in progress, and
Finished Goods inventories in accordance with the terms of this agreement.  Any
such termination or expiration will not relieve either party from any accrued
obligations defined hereunder.

Disputes:
Both parties agree to negotiate disputes in good faith and should they fail to
reach agreement, agree that any dispute, controversy or difference between the
parties, arising out of or related to this Agreement may be resolved, upon the
request of the parties, through final and binding arbitration.  The parties
agree that this Section does not apply to breaches of confidentiality or
intellectual property provisions whereby E-Stamp may petition a court of law for
injunctive relief.

This Agreement and the Addendums attached hereto contain all the Agreements,
understanding, representations, conditions, warranties and covenants, and
constitutes the sole and entire agreement between the parties hereto pertaining
to the subject matter hereof and supersedes all prior communications or
agreements, written or oral.  This Agreement may not be revised or modified
except by the mutual written consent of both Modus Media and E-Stamp as attested
to by an instrument signed by an officer of each of them.

                                      -6-
<PAGE>

Agreed and accepted by:

E-Stamp Corporation                   Modus Media International

By        Helen Eliadis               By       Colleen Mitchell
  ------------------------------        ------------------------------

Title     Director, M&D               Title    Sales Representative
     ---------------------------           ---------------------------

Date      June 1, 1999                Date     June 1, 1999
    ----------------------------          ----------------------------

Signature /s/ Helen Eliadis           Signature /s/ Colleen Mitchell
         -----------------------               -----------------------

                                      -7-
<PAGE>

                                    Appendix
                                    --------

Modus Media International will provide E-Stamp Corporation Call Center Services
in Modus Media's Preston Solution Center during their Beta phase.  While E-Stamp
is in official Beta phases, their Call Center pricing will be based on an hourly
charge.  The charge will be $28.00 per hour of Call Center time.  Call Center
Pricing in Addendum B will be applicable once E-Stamp exits Beta Phase.

                                      -8-
<PAGE>

                                                                December 4, 1998
<TABLE>
<CAPTION>
                                                   FULFILLMENT PRICE QUOTE
                                                          E-Stamp
Modus Media International
Preston Solution Center
- ---------------------------------------------------------------------------------------------------
                  Description                      Charge             Volume               Total
- ---------------------------------------------------------------------------------------------------
                                                                     Per Month            Monthly
<S>                                               <C>               <C>                  <C>
          ADMINISTRATIVE CHARGES
   Monthly Management Fee                         $1,500.00                  1           $ 1,500.00
   Set-up Fees                                    $1,200.00                  1           $ 1,200.00

          RESPONSE MANAGEMENT
   Inbound 800 Call Service
          0 - 20,000 minutes                      $    0.95              4,545           $ 4,317.75
          20,001 - 40,000 minutes                 $    0.92                  0           $     0.00
          40,001 + minutes                        $    0.87                  0           $     0.00
   Mail / Fax / e-mail Processing                 $    1.30                300           $   390.00
   Imported Orders                                $    0.35                100           $    35.00

          FINANCIAL PROCESSING
   Visa, MasterCard, Discover                          3.50%        $90,000.00           $ 3,150.00
   American Express                                    4.00%        $22,500.00           $   900.00
   Check Processing                               $    1.50                 25           $    37.50
   Purchase Order Service                         $    8.60                 25           $   215.00
   Additional Invoice/Statement                   $    4.00                  0           $     0.00
   Returned Check Processing                      $   15.00                  1           $    15.00
   Refund Processing                              $    0.00                  0           $     0.00

          SPECIAL OPERATIONS
   Programming, per hour                          $  115.00                  0           $     0.00
   Clerical, per hour                             $   48.00                  0           $     0.00
   Data Transfer                                  $    7.50                 42           $   315.00
   FTC Cards                                      $    0.71                  0           $     0.00
   Followup Outbound Calls                        $    1.60                500           $   800.00
   Outbound Fax Fee                               $    1.30                 21           $    31.50

          FULFILLMENT CHARGES
   Enduser Pick & Pack first line item            $    2.27              1,000           $ 2,270.00
   Additional line items in same carton, per      $    0.35                 50           $    30.00
    item
   Serial Number Capture                          $    0.18
   Intl Export Documents, per order               $    3.50                  0           $     0.00
   Freight & Postage                              $    0.00                  0           $     0.00
   End User Returns Processing                          TBD                  0           $     0.00
   Bulk Returns Processing                              TBD                  0           $     0.00

          MATERIALS HANDLING
Receive furnished product, per part #             $   22.90                  1           $    22.90
Storage, per pallet, per month                    $   14.50                  5           $    72.50

          REPORTING
Standard per occurrence (up to 5 pgs)             $    5.00                  0           $     0.00
          Customized Report                       $    0.00                  0           $     0.00

TOTAL P.O.                                                                               $15,520.09
- ---------------------------------------------------------------------------------------------------

- -----------------------------------------------------------------------------------------------------------------------------
                  Description                                                     Comments
- -----------------------------------------------------------------------------------------------------------------------------
           ADMINISTRATIVE CHARGES
<S>                                               <C>
   Monthly Management Fee                         Covers 1 set of basic reports, on-going training, project coordination and
                                                  documentation
   Set-up Fees                                    One time fee.  Set up includes programming fees and one 800 number.

          RESPONSE MANAGEMENT
   Inbound 800 Call Service
          0 - 20,000 minutes                      per minute
          20,001 - 40,000 minutes                 per minute
          40,001 + minutes                        per minute
   Mail / Fax / e-mail Processing                 Per mail/fax/e-mail order
   Imported Orders                                Per imported order

          FINANCIAL PROCESSING
   Visa, MasterCard, Discover                     3.5% of total order charge
   American Express                               4% of total order charge
   Check Processing                               Per Check
   Purchase Order Service                         Per initial order (includes 1st invoice)
   Additional Invoice/Statement                   Per invoice or statement
   Returned Check Processing                      Per returned check
   Refund Processing

          SPECIAL OPERATIONS
   Programming, per hour                          Per programming hour
   Clerical, per hour                             Per clerical hour
   Data Transfer                                  Per file created (ASCII, fixed length, comma delimited)
   FTC Cards                                      Per notification (Customer notification of delayed shipment)
   Followup Outbound Calls                        Per Call (Credit Card Problem, etc.)
   Outbound Fax Fee                               Per Fax Page

          FULFILLMENT CHARGES
   Enduser Pick & Pack first line item            Includes pick/pack, packing slip, small ship carton (price may change
                                                  depending on carton size)
   Additional line items in same carton, per      Per additional line items
    item
   Serial Number Capture                          Per number captured
   Intl Export Documents, per order               Per order
   Freight & Postage                              Actual costs billed as incurred
   End User Returns Processing                    Per RMA
   Bulk Returns Processing                        Per RMA Unit (incl receive, log, disposition, scrap or re-stock)

          MATERIALS HANDLING
Receive furnished product, per part #             Per Part # - Furnished product received from 3rd party
Storage, per pallet, per month                    Per pallet

          REPORTING
Standard per occurrence (up to 5 pgs)             Per Occurrence (standard reports beyond the basic set included in the
                                                  monthly management fee)
          Customized Report                       Per hour

TOTAL P.O.                                        Sum of all estimated charges
- -----------------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      -9-
<PAGE>

<TABLE>
<CAPTION>
Modus Media International                                       Estamp                                       December 4, 1988
Preston Solution Center

               Service                                         Charge                             Comments
- ----------------------------------------                   --------------   -------------------------------------------------
<S>                                                        <C>              <C>
Turnkey
   Administration
                                                           --------------
      New SKU setup                                            $   135.00   Per Product Family per Platform
                                                           --------------
      Management Fee                                           $     1.00   Per Kit
                                                           --------------
      BOM Change                                               $    50.00   Per ECO
                                                           --------------
      EDI Import                                               $     0.35   Per Order
                                                           --------------
      Order Entry Fax Orders                                   $     1.30   Per Order
                                                           --------------
      Manufacturing Invoicing                                       Order   Timeframe (Each order, day, weekly, monthly)
                                                           --------------
      Distribution Invoicing                                      Monthly   Timeframe (Each order, day, weekly, monthly)
                                                           --------------
      Payment Terms                                                  n-30   (Cash, net 30, net 60, etc.
                                                           --------------

   Manufacturing
      Manufacturing Service Level
                                                           --------------
         Components Stock                                               3   Days
                                                           --------------
         Components Not Stock                                          10   Days
                                                           --------------
      Assembly                                                 $     0.10   Touch (Boxes -2; Shrinkwrap -1; Scanning -1; Sleeves -2)
                                                           --------------
      Disk Subs                                                        NA   Touch (Disk, label, bag = 1 touch)
                                                           --------------
      Disk Replication                                                 NA   HD or LD
                                                           --------------
      Make ready/staging fee
                                                           --------------
         Run lengths less than 500 units                               NA   Per Kit
                                                           --------------
         Run lengths greater than or equal to 500 units                NA   Per Kit
                                                           --------------
         Run lengths greater than or equal to 5000 units               NA   Per Kit
                                                           --------------
      Palletization                                            $     0.20   Per Kit
                                                           --------------
      Rework                                                   $     0.10   Proposed $135 Add'l Charge
                                                           --------------
      Rush Order                                                       NA   Per Order
                                                           --------------
      CD Replication
                                                           --------------
         24 hr turn Mastering                                  $ 1,100.00   One time charge
                                                           --------------
         Production                                            $     0.62   Per CD
                                                           --------------
         72 hr turn Mastering                                  $   540.00   One time charge
                                                           --------------
         Production                                            $     0.65   Per CD
                                                           --------------
         5 day turn Mastering                                  $     0.00   One time charge
                                                           --------------
         Production                                            $     0.65   Per CD
                                                           --------------
         CD insertion into tyvek sleeve                        $     0.12   Per CD
                                                           --------------
         CD insertion into plastic sleeve                              NA   Per CD
                                                           --------------

   Distribution
      Distribution Service Level
                                                           --------------
         Orders in by ___ ship same day                           2:00 PM   Time: Mountain Standard
                                                           --------------
         Expedite orders in by ___ ship same day                  2:00 PM   Time: Mountain Standard
                                                           --------------
         Orders in by ___ ship next day                           2:00 PM   Time: Mountain Standard
                                                           --------------
      Serial Number Capture (Distribution)                     $     0.18   Each
                                                           --------------
      Generate Customer Letters                                        NA   Per Page
                                                           --------------

   Pick & Pack
      End User (Orders from 1 to 20)
                                                           --------------
         1st Pick                                              $     2.27   Per Kit
                                                           --------------
         Additional Picks                                      $     0.35   Per Kit
                                                           --------------
      Bulk (Orders from 21 and larger)
                                                           --------------
         1st Line                                              $    22.00   Per Line
                                                           --------------
         Additional Lines                                      $    22.00   Per Line
                                                           --------------
      Export Documents Preparation                             $     0.05   Per Order
                                                           --------------
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
Modus Media International                                       Estamp                                       December 4, 1988
Preston Solution Center

               Service                                         Charge                             Comments
- ----------------------------------------                   --------------   -------------------------------------------------
<S>                                                        <C>              <C>
                                                           --------------
      Freight                                                  $     0.04   Per Freight sent via Prepaid & Add, Collect or
                                                                            3rd Party Billing
                                                           --------------
      Rush Orders                                              $     3.50
                                                           --------------

   RMAs
                                                           --------------
      1-9 Units                                                             Flat fee only
                                                           --------------
      Over 9 Units                                                          Each Kit over 9 + flat fee
                                                           --------------

   Receiving
                                                           --------------
      Furnished Parts (Customer Supplied)                      $    22.90   Per pallet
                                                           --------------

   Purchasing
                                                           --------------
      Outside Purchase markup                                        18.5%  Components Unit Price less than $20
                                                           --------------
      Outside Purchase markup                                        18.5%  Components Unit Price greater than $20
                                                           --------------
      Print 3 or 4 Color                                                    Off List
                                                           --------------
      Print 2 Color                                                         Off List
                                                           --------------
      Print 1 Color                                                         Off List
                                                           --------------
      One Time Charges (Prelim)(die costs, etc.)               $   815.00   Billed on a separate PO
                                                           --------------

   Inventory
                                                           --------------
      Storage of Components                                    $    14.50   $Pallet/Month
                                                           --------------
         Average Number / Month                                             Pallets
                                                           --------------
      Storage of Finished goods                                $    14.50   $Pallet/Month
                                                           --------------
         Average Number / Month                                             Pallets
                                                           --------------
      Cost of Money                                                  1.30%  Per Month (Stream owned components older than 90 Days)
                                                           --------------
      Obsolete                                                        180   How many days/months before defined as obsolete
                                                           --------------
                                                                 Monthly    When is it dispositioned
                                                           --------------
                                                               $    12.50   Per pallet price to return to customer
                                                           --------------

   Miscellaneous
                                                           --------------
      Reports                                                  $     5.00   Each
                                                           --------------
      Faxes                                                    $     1.30   Per page
                                                           --------------
      File Transfers                                           $     7.50   Each
                                                           --------------
      Programming                                              $   115.00   Per hour
                                                           --------------

   Forecast
                                                           --------------
         Manufacturing                                         Rolling 90   Type and timeframe of forecast
                                                           --------------
                                                      After 21st of Month   When provided
                                                           --------------
         Distribution                                                       Type and timeframe of forecast
                                                           --------------
                                                                            Min. daily orders
                                                           --------------
                                                                            Max. daily orders
                                                           --------------
         Phone Center                                                       Type and timeframe of forecast
                                                           --------------
                                                                            Min. daily calls
                                                           --------------
                                                                            Max. daily calls
                                                           --------------
</TABLE>

<PAGE>

                                                                   EXHIBIT 10.16

                            AGREEMENT FOR SERVICES


This Agreement is made and entered into as of June 27, 1997 ("Effective Date")
by and between E-Stamp ("Customer") and Pilot Network Services, Inc. ("Pilot").

     1.   Term of Agreement. Unless earlier terminated as provided in this
Agreement, the term of this Agreement will commence on the Effective Date and
will continue for a period of 12 months, and shall be automatically renewed for
successive one-year terms thereafter.

     2.   Services to be provided by Pilot.

          (a)  Pilot agrees to provide the services set forth on the attached
Schedule(s).

          (b)  The services set forth in this Section 2 will be provided to
Customer at rates and charges as indicated on the attached Schedule(s); provided
Pilot shall have the right to change the rates and charges to be charged for
such services by notifying Customer 90 days in advance of the effective date of
the change.

          (c)  Customer represents and warrants that Pilot's services will only
be used for lawful purposes. Customer understands that transmission of any
material in violation of any U.S., state, local or foreign laws or regulations
is prohibited. This includes, but is not limited to; copyrighted material,
threatening or obscene material, or material protected by trade secret. Customer
agrees to indemnify Pilot from any costs, damages, fees and expenses incurred by
Pilot which are attributable to the use of Pilot's services by Customer.
Customer will indemnify Pilot for costs and expenses related to third party
claims, provided that Pilot: (1) notifies Customer promptly in writing of the
claim and (2) permits Customer to defend, compromise or settle the claim in a
manner not adverse to Pilot and provides on a reasonable basis information,
assistance and authority to enable Customer to do so. Customer agrees to
reimburse Pilot's reasonable expenses and attorney's fees on an as-incurred
basis for such activity. Pilot shall have no authority to settle any claim on
behalf of Customer. THIS SECTION AND SECTION 4 STATE THE ENTIRE LIABILITY OF
CUSTOMER AND PILOT WITH RESPECT TO THE SERVICES PROVIDED BY PILOT TO CUSTOMER
UNDER THIS AGREEMENT, AND NEITHER CUSTOMER NOR PILOT SHALL HAVE ANY ADDITIONAL
LIABILITY WITH RESPECT TO ANY ALLEGED OR PROVEN INFRINGEMENT OR UNLAWFUL
ACTIVITY.

     3.   Term of Payment. The Implementation Charge set forth on the attached
Schedule(s) shall be payable in two equal monthly installments commencing on the
Effective Date. The Monthly Service Charges will be payable by the Customer
commencing sixty days after the Effective Date. Pilot will submit to Customer an
invoice for services provided at the beginning of each monthly period payable
upon receipt of invoice. A monthly service charge of 1.5% of the unpaid balance
will be payable on past due balances.

     4.   Limitation of Liability. The parties agree that: (i) Pilot exercises
no control and has no responsibility whatsoever over the content of information
transmitted by use of Pilot's services, (ii) Pilot is not responsible for the
accuracy or quality of such information, (iii) use of such information is at
Customer's own risk, and (iv) this is not a contract for the sale of goods and,
therefore, is not subject to the Uniform Commercial Code. Pilot warrants that it
has the right and power to enter into this Agreement and that it will provide
the services specified in this Agreement in a workmanlike and professional
manner. IN ALL OTHER RESPECTS, NO REPRESENTATIONS AND WARRANTIES (WRITTEN OR
ORAL) HAVE BEEN MADE BY THE PARTIES. THE SERVICES ARE PROVIDED "AS IS" AND PILOT
DISCLAIMS ALL WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED, FOR THE
SERVICES IT IS PROVIDING, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Pilot makes no guarantees
with respect to the services rendered under this Agreement and Pilot shall have
no liability as a result of Pilot's performance of this Agreement, including,
without limitation, interrupted service, unauthorized access by a third party,
errors or delays in transmission, loss of data or failure to meet Customer's
requirements. Without limiting the foregoing, Pilot's entire liability under,
for breach of, arising under, or related to this Agreement or the services to be
provided hereunder (whether in tort, contract or any other theory), shall not
exceed the aggregate charges for services rendered for
<PAGE>

the prior twelve months under this Agreement that gave rise to such liability.
In no event shall either party be liable for indirect, exemplary, special,
incidental or consequential damages, or costs, including but not limited to, any
lost profits or revenues, loss of use or goodwill, or any third party claims,
even if such party has been advised of the possibility of such damages.

     5.   Termination. Either party may terminate this Agreement without penalty
upon ninety (90) days advance written notice to the other party prior to the end
of the initial, or any successive, twelve (12) month periods. In addition,
Customer agrees that Pilot, at its option, may either terminate this Agreement
upon thirty (30) days written notice to Customer, or suspend all services to
Customer, if any amount due for services rendered under this Agreement is
outstanding according to terms specified in Section 3 unless Customer remedies
the problem within such thirty (30) day period. Either party may terminate this
Agreement if the other party is in material breach of this Agreement and has not
cured the breach within thirty (30) days of written notice specifying the
breach. Termination of this Agreement shall result in any and all balances past
due becoming immediately due and payable.

     6.   General Provisions.

          (a)  The term "Agreement" as used herein will include any future
               written amendments, modifications, or supplements made hereto,
               provided, however, that no amendments, modifications or
               supplements to this Agreement shall be deemed valid unless signed
               by authorized representatives of both parties and expressly
               referencing this Agreement. No representation or statement not
               expressly contained in this Agreement or, except as set forth in
               Section 2(b) hereof, in any written, signed amendment hereto
               shall be binding upon Pilot or Customer.

          (b)  This Agreement may not be assigned by Customer without the prior
               written consent of Pilot.

          (c)  If any of the provisions are invalid under any applicable statute
               or rule of law, such provisions are to that extent to be deemed
               omitted and the remaining provisions of this Agreement will
               remain in full force and effect.

          (d)  In the event suit is commenced to collect any amounts owing
               hereunder, the prevailing party shall be entitled to recover
               reasonable attorney's fees and costs of suit.

          (e)  The Agreement constitutes the complete Agreement between the
               parties and supersedes all previous representations,
               understandings or agreements and shall prevail notwithstanding
               any variance with terms and conditions of any proposal submitted.

          (f)  This Agreement shall be governed by and construed in accordance
               with the laws of the State of California, regardless of its
               choice of law provisions.

          (g)  Any legal action or proceeding relating to this Agreement shall
               be instituted in any state or federal court in San Francisco or
               Alameda County, California. Pilot and Customer agree to submit to
               the jurisdiction of, and agree that venue is proper in, the
               aforesaid courts in any such legal action or proceeding.

          (h)  All notices, including notices of address change, required to be
               sent hereunder shall be in writing and deemed given when
               delivered by personal delivery, telegram, facsimile, telecopier,
               courier service or registered mail to the addresses listed on the
               signature page, or such other address that a party may specify.

          (i)  Pilot shall not be in default or otherwise liable for any delay
               in or failure of its performance under this Agreement where such
               delay or failure arises by reason of any Act of God, or any
               government

                                      -2-
<PAGE>

               or any governmental body, acts of war, the elements, strikes or
               labor disputes, or other cause beyond the control of Pilot.

          (j)  Customer agrees to comply with all applicable United States
               export control laws and regulations, including without
               limitation, the laws and regulations administered by the United
               States Department of Commerce and the United States Department of
               State.

EACH PARTY ACKNOWLEDGES THAT IT HAS READ THIS AGREEMENT, UNDERSTANDS IT, AND
AGREES TO BE BOUND BY ITS TERMS.

CUSTOMER: E-Stamp                     PILOT NETWORK SERVICES, INC.
          -----------------

By: /s/ T. Reinemer                   By: /s/ Marketta Silvera
    -----------------------              ------------------------------

Name: T. Reinemer                     Name: Marketta Silvera
      ---------------------                ----------------------------

Title: VP Operations                  Title: CEO
       --------------------                 ---------------------------

Address: 4009 Miranda Ave.            Address: 1080 Marina Village Parkway
         ------------------                    Alameda, California 94501

Palo Alto, CA  94304
- ---------------------------

Agreement only valid in
conjunction with attached
Amendment.

                                      -3-
<PAGE>

                  Amendment To Agreement For Services Between
                          Pilot Network Services and
                              E-Stamp Corporation

1.   Section 3.  Term of Payment, change the 3rd sentence to read:

Pilot will submit to Customer an invoice for services provided at the beginning
of each monthly period payable within thirty (30) days of receipt of invoice.

2.   Add the following to Section 5, Termination:

In the future, should Pilot elect not to provide Secure Web Hosting Services on
NT platform, Customer has the right to terminate this Agreement upon thirty
(30) days written notice to Pilot, providing that NT hosting at a Pilot
Service Center is a Customer requirement.

     EACH PARTY ACKNOWLEDGES THAT IT HAS READ THIS ADDENDUM, UNDERSTANDS IT, AND
     AGREES TO BE BOUND BY ITS TERMS.

    E-Stamp Corporation                 Pilot Network Services, Inc.

By: /s/ T. Reinemer                     By: /s/ Marketta Silvera
    -------------------------               --------------------------

Name & Title: Reinemer VP-Ops.          Name & Title: CEO
              ----------------                       -----------------

Date: June 27, 1997                     Date:
      ------------------------               -------------------------
<PAGE>

1.   Charges

1.1.    [***] Secure Internet Service via [***]

        One-Time Setup Charge:    $ 6,000
        Monthly Charge:           $ 4,000

        Included Services:
          .    Procure, provision and install:
               -  T-1 line connecting Customer to Pilot
               -  Routers and CSU/DSUs
          .    Manage all Domain Name registrations with InterNIC:
               -  Host and Name Server registration or re-registration (InterNIC
                  registration fees passed through to the Customer)
          .    Establish Internet connectivity and access to all generic
               Internet services
          .    Configure and deploy [***]
               -  Customize [***] to implement Customer security policies
               -  Sanitize all [***] for security and auditing purposes
               -  Establish a secure, fortified email gateway
               -  Set up external fortified [***] service at Pilot Service
                  Center
               -  Install and integrate security monitoring tools into the
                  firewall
               -  Install and integrate logging mechanisms into the firewall
               -  Install and integrate Pilot Traffic Profile(TM) Reporting
                  System into firewall
               -  Setup and test tape backup systems
               -  Provide hot spares for immediate swap-out in event of server
                  failure
          .    Administration and management of [***]
               -  Apply security patches, fix bugs and/or provide workarounds
               -  Maintain all equipment and software, including upgrades
               -  Maintain fortified email gateway and external [***] service
               -  Execute daily incremental and full weekly backups with offsite
                  tape storage
               -  Provide online access to Pilot Traffic Profile(TM) Reports
                  for authorized viewing
               -  Log, document and submit intrusion attempt reports
          .    Provide Internet access to Customer-maintained or Pilot-Hosted
               server(s)
          .    Provide NNTP Newsfeed to Customer-maintained (or Pilot-Hosted)
               News:

          Charges are based on initial twelve-month commitment. Customer will be
          invoiced for setup charges in two equal monthly installments
          commencing on the effective date. Monthly service charges will become
          due and payable sixty days after the effective date. This quotation
          is valid for thirty (30) days beginning May 23, 1997.

Charges for this service shall not commence until such time that the customer
notifies to begin the installation process. Customer agrees to provide
notification 45 day before E-Stamp beta test starts.


                                     Approved: /s/ T.J. Reinemer
                                               ---------------------------
                                                     (signature)

                                         Name:  T.J. Reinemer
                                               ---------------------------
                                                    (please print)

                                         Title: VP- Operations
                                                --------------------------
                                                    (please print)

                                         Date: 27-June-97
                                               ---------------------------
                                                    (please print)

Standard prices for Secure Internet Services are $12,000 One-Time Setup Charge
and $5,000 Monthly Charge. Special prices quoted apply only if ordered in
conjunction with E-fill application and database hosting R&D -- and marketing
site web hosting services. Standard service charges will apply if ordered
separately.

NOTIFICATION TO BEGIN THE INSTALLATION PROCESS WILL BE FORTHCOMING NOT LATER
THAN 9/30/97, UNLESS THE U.S. POSTAL SERVICE DENIES THE APPROVAL FOR THIS
PROJECT WITH E-STAMP OR CAUSES OTHER UNFORESEEN DELAYS.

/s/ [T.J.R.] 30-June-97  /s/ [ILLEGIBLE]  /s/ [ILLEGIBLE] 6/30/97


*** Confidential treatment has been requested for the bracketed portions. The
    confidential redacted portion has been omitted and filed separately with
    the Securities and Exchange Commission.
<PAGE>

1.2.  Marketing World-Wide Web (WWW) Server Hosting*


        Additional One-Time Setup Charge:    $6,000
        Additional Monthly Charge:           $  500

        Included Services:
               .    Create Marketing Web server:
                    -  Procure dedicated Web server and tape backup system
                    -  Configure server with the OS and Web Server & Sequel
                       software
                    -  Sanitize the [***] for security and auditing purposes
                    -  Register under Customer domain (e.g., www.estamp.com)
                    -  Integrate Web server into [***]
                    -  Install and integrate security monitoring tools into the
                       server
                    -  Install and integrate logging mechanisms into the server
                    -  Install and integrate Pilot Traffic Profile Reporting
                       System(TM) into server
                    -  Setup and test tape backup system
                    -  Configure and deploy Pilot's proprietary system for
                       securely and automatically updating Web content
                    -  Supply [***] of storage for Customer content (upgradable)
                    -  Provide hot spares for immediate swap-out in event of
                       server failure
               .    Administration and management of Web server:
                    -  Apply security patches, fix bugs and/or provide
                       workarounds
                    -  Support of authenticated mechanism for content updates
                    -  Execute daily incremental and full weekly backups with
                       offsite tape storage
                    -  Maintain all equipment and software, including upgrades
                    -  Provide online access to Pilot Traffic Profile
                       Reports(TM)

               Charges are based on initial twelve-month commitment. Customer
               will be invoiced for setup charges in two equal monthly
               installments commencing on the effective date. Monthly service
               charges will become due and payable sixty days after the
               effective date. This quotation is valid for thirty (30) days
               beginning May 23, 1997.

                                   Approved: T.J. Reinemer
                                             ---------------------
                                                 (signature)

                                       Name: T.J. Reinemer
                                             ---------------------
                                                 (please print)

                                        Title: VP - Operation
                                             ---------------------
                                                 (please print)

                                        Date: 27-June-97
                                             ---------------------
                                                 (please print)

Customer will provide all the software necessary to host the Web server. If
additional third-party software is to be installed and supported, the software
must be mutually agreed upon in advance between Pilot and the Customer such an
addition could affect pricing for services.


*** Confidential treatment has been requested for the bracketed portions. The
    confidential redacted portion has been omitted and filed separately with
    the Securities and Exchange Commission.
<PAGE>

     Secure Commerce Web Server Hosting and NT R&D Project*

     One-Time Setup Charge:   $6,000
     Monthly Charge:          $3,500

     Included Services:
          .    Install and deploy Customer-provided dedicated E-fill application
               and database servers and tape backup systems

               -  Install customer-provided servers (primary and backup) and
                  RAID 5 with the OS, application and database server software
               -  Sanitize the  [***]for security and auditing purposes
               -  Integrate servers into [***]
               -  Install and integrate security monitoring tools into the
                  servers
               -  Install and integrate logging mechanisms into the servers
               -  Position E-fill servers on dedicated [***] Ethernet network
                  segment within Pilot Service Center
               -  Setup and test tape backup system
          .    Administration and management of E-fill and database servers:
               -  Apply security patches, fix bugs and/or provide workarounds
               -  Support authenticated process for content updates &
                  synchronization
               -  Perform regular backups of servers, including offsite storage
                  of tapes
               -  Provide access to authorized agents for equipment maintenance
               -  Maintain software, including performing upgrades
               -  Provide uptime monitoring of the servers
               -  Perform database index maintenance
          .    Research security requirements of services hosted on the NT
               platform:
               -  Protection techniques to guard against denial-of-service
                  attacks
               -  Protection techniques to guard against unauthorized server
                  access
               -  Deployability of O/S configuration to multiple machines
               -  Integration into the [***]
               -  Porting, monitoring and other utilities
               -  Provide written report of conclusions at 3 and 6 month
                  milestones
          .    Log, document, and submit intrusion-attempt reports to Customer

          The monthly charge is based on an initial six-month commitment to the
          service and is due at the beginning of each month. One-time setup fees
          are due and payable in advance. This quotation is valid for thirty
          (30) days beginning May 23, 1997 and anticipates that services will be
          installed within 90 days of order.

Charges for this service shall not commence until such time that the customer
notifies Pilot to begin installation process. Customer agrees to provide
notification 45 days before E-Stamp beta tests starts.


                                    Approved: /s/ T.J. Reinemer
                                             -----------------------
                                                   (signature)

                                       Name: T.J. Reinemer
                                             -----------------------
                                                   (please print)

                                       Title: VP-Operations
                                             -----------------------
                                                   (please print)

                                       Date:     27-June-97
                                             -----------------------
                                                   (please print)

If additional third-party software is required to be installed and supported,
the software must be mutually agreed upon in advance between Pilot and the
Customer and pricing for services and support could potentially be affected.

NOTIFICATION TO BEGIN THE INSTALLATION PROCESS WILL BE FORTHCOMING NOT LATER
THAN 9/30/97, UNLESS THE U.S. POSTAL SERVICE DENIES THE APPROVAL FOR THIS
PROJECT WITH E-STAMP OR CAUSES UNFORESEEN DELAYS.

/s/ [T.J.R.] 30-June-97  /s/ [ILLEGIBLE]  /s/ [ILLEGIBLE] 6/30/97

*** Confidential treatment has been requested for the bracketed portions. The
    confidential redacted portion has been omitted and filed separately with
    the Securities and Exchange Commission.

<PAGE>

                                                                 Exhibit 10.18

                      ADVERTISING AND PROMOTION AGREEMENT

     THIS ADVERTISING AND PROMOTION AGREEMENT (the "Agreement") is made this 14
                                                    ---------
day of May, 1999 (the "Effective Date") between YAHOO!, INC., a California
                       --------------
corporation, with offices at 3420 Central Expressway, Santa Clara, CA 95051,
("YAHOO") and E-Stamp Corporation, ("Advertiser"), a Delaware corporation, with
                                     ----------
offices at 2855 Campus Drive, San Mateo, California, 94403.

     In consideration of the mutual promises contained herein, the parties agree
as follows:

SECTION 1:  DEFINITIONS
- -------------------------

The following terms are used in this Agreement with the respective meanings set
forth below:

     "Advertiser Brand Features" shall mean Advertiser's trademarks, service
      -------------------------
marks, logos and other distinctive brand features of Advertiser.

     "Advertiser Competitor" shall mean a company or a division of a company
      ---------------------
primarily in the business of selling U.S. electronic postage or U.S. electronic
postage software. The agreed upon list of such companies at the Effective Date
is as follows: Stamps.com, Pitney Bowes and Neopost. In the event Advertiser
Competitor is acquired by another company which is not an Advertiser Competitor,
the acquiring company, or the division of such company that assumes the business
of Advertiser Competitor, shall be considered Advertiser Competitor, provided
such company or division is primarily in the business of selling U.S. electronic
postage or U.S. electronic postage software. From time to time, but no more than
one time per calendar quarter, Advertiser may request additions to this list of
Advertiser Competitors of certain companies that receive PC postage
certification from the USPS. Such companies shall be included as Advertiser
Competitors upon Yahoo approval, which shall not be unreasonably withheld,
provided that Yahoo may honor any agreements with such newly designated
Advertiser Competitors entered into prior to such designation.

     "Advertiser Links" shall mean the hyperlinks placed by Yahoo in connection
      ----------------
with this Agreement including but not limited to those links described on
Exhibit A. For the avoidance of doubt, Advertiser Links includes hyperlinks to
- ---------
Advertiser Site embedded in Yahoo Delivers email and the EZ Venture Program,
placed in connection with this Agreement.

     "Advertiser Site" shall mean the web site owned and operated by, or on
      ---------------
behalf of, Advertiser dedicated to the sale of electronic postage services or
software and currently located at http://www.estamp.com.
                                         --------------
     "Affiliate" shall mean any entity controlled by, controlling, or under
      ---------
common control with a party hereto but only for so long as such control exists,
where "control" means ownership of more than fifty percent of the equity
       -------
entitled to vote in the election of directors or if not a corporation, the
corresponding managing authority.

                                       1

<PAGE>
     "Click-through" shall mean the initiation of a user presence at the
      -------------
Advertiser Site that originated from an Advertiser Link as recorded by Yahoo's
advertiser reporting system.

     "EZ Venture Promotion" shall mean that Yahoo promotional program, the
      --------------------
specifications of which are attached as Exhibit E hereof.

     "Included Pages" shall mean those pages on the Yahoo Properties containing
      --------------
Advertiser Links. Included Pages includes EZ Venture Promotion pages containing
Advertiser Links but excludes Yahoo Direct email messages delivered by Yahoo in
connection with this Agreement.

     "Jump Page" shall mean the page of the Advertiser Site dedicated to the
      ---------
promotion of electronic postage services or software which is the first page a
user sees when clicking on an Advertiser Link (other than a Promotion Link) and
which includes an application for a user to sign up for such services or a
direct hyperlink to such application.

     "Launch Date" shall mean the date on which the program described herein is
      -----------
launched and by which Advertiser Site is Fully Operational (as defined in
Section 5.3 hereof), which date is originally scheduled as July 15, 1999.

     "Promotion Link" shall mean a front page graphic link which: (a) contains
      --------------
Advertiser brand features, (b) has dimensions no larger than 230 pixels wide by
33 pixels high, (c) may contain animation of up to 6 seconds with no looping,
(d) has a maximum file size of three (3) kilobytes, (e) conforms to Yahoo's
promotional specifications and guidelines, which may be amended by Yahoo from
time-to-time, and (f) links to a promotional Jump Page.

     "Yahoo Brand Features" shall mean Yahoo's trademarks, service marks, logos
      --------------------
and other distinctive brand features of Yahoo.

     "Yahoo Post Office" shall mean a Yahoo Property, under the editorial
      -----------------
control of Yahoo, dedicated to postal content and services.

     "Yahoo Main Site" shall mean Yahoo's principal U.S. based directory to the
      ---------------
World Wide Web currently located at http://www.yahoo.com.

     "Yahoo Properties" shall mean any Yahoo branded or co-branded media
      ----------------
properties, including, without limitation, global Internet guides that are
developed in whole or in part by Yahoo or its Affiliates. A description of
certain applicable Yahoo Properties can be found on Exhibit A.
                                                    ---------

SECTION 2:  THE PROGRAM
- -------------------------

     2.1  Program Elements. Yahoo shall make available a program comprised of
          the elements set forth in this Section 2.1 (the "Program")

          (a)  Advertiser Links. During the Term of the Agreement Yahoo shall
               ----------------
               place the Advertiser Links as specified on Exhibit A.
               Notwithstanding the foregoing, Yahoo reserves the right, at its
               sole discretion, to remove keywords and category pages set forth
               in Exhibit A, which it reasonably believes are trademarks,
               tradenames, product names or brand names belonging to an entity
               not party to this Agreement, and substitute such words with
               similar

                                       2
<PAGE>

               inventory. The Yahoo Post Office shall be launched by Yahoo by
               the Launch Date or July 15, 1999, whichever is later. Yahoo may
               launch the Yahoo Post Office prior to such date provided the
               exclusivity provisions of Section 6.3 shall still apply.

          (b)  Front Page Promotions. During the Term, Yahoo shall include
               ----------------------
               Advertiser in one multi-sponsor promotion on the Front Page of
               the Yahoo Main Site. Such front page promotion shall (i) be
               subject to available inventory, it being understood and agreed
               that the promotion will be scheduled as close to the Launch Date
               as possible, (ii) continue for at least one week, and (iii) be
               conducted in accordance with Yahoo's then current standard
               policies and procedures for promotions (including but not limited
               to those policies pertaining to user information) and applicable
               law. Yahoo shall place a Promotion Link on the Front Page in
               connection with such promotion.

          (c)  EZ Venture Promotion. Commencing after the Launch Date and
               ---------------------
               continuing to the extent possible through Period 1 (as defined in
               Section 2.3 below), Yahoo shall include Advertiser in an EZ
               Venture Promotion.

          (d)  Yahoo Delivers. During Period 1 (as defined in Section 2.3
               ---------------
               below), Yahoo will send a total of [***] emails to Yahoo users
               that have opted to participate in the receipt of emails as part
               of the registration process for Yahoo. Such emails will be
               targeted and contain content as mutually agreed to by the
               parties. The email will comply with the guidelines and
               specifications provided in Exhibit A.

     2.2 Advertiser Link Requirements. As requested by Yahoo from time to time,
         ----------------------------
     Advertiser shall execute the standard Yahoo insertion order set forth in
     Exhibit C in connection with all Advertiser Links for administrative
     purposes only. The standard terms and conditions generally attached to such
     insertion order shall not apply. Advertiser shall provide all materials for
     the Advertiser Links in accordance with Yahoo's policies in effect from
     time to time regarding (i) the manner of transmission to Yahoo, (ii) the
     lead-time prior to publication, (iii) content/creative and (iv) promotions.
     Such policies may be found at www.yahoo.com/docs/advertising and the
                                   ------------------------------
     current version of the most relevant such policies are attached as Exhibit
     F. Yahoo shall not be required to publish any Advertiser Link that is not
     received in accordance with such policies. All contents of Advertiser Links
     are subject to Yahoo's approval. Yahoo reserves the right to reject or
     cancel any Advertiser Link, at any time, for any reason whatsoever
     (including belief by Yahoo that placement of Advertiser Link may subject
     Yahoo to criminal or civil liability). In the event of such cancellation,
     and provided Advertiser is not otherwise in breach of this Agreement, Yahoo
     shall work with Advertiser to promptly replace such Advertiser Link with an
     acceptable Advertiser Link. All Advertiser Links provided by Advertiser
     must be in compliance with and contain all disclosures required by all
     applicable U.S. federal, state and local laws, rules and regulations,
     including, without limitation, consumer protection laws and rules and
     regulations governing product claims, truth in labeling, and false
     advertising.

[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.

                                       3

<PAGE>

     2.3 Performance Guarantees. During the Term and subject to Section 5.3
         ----------------------
     hereof: (a) Yahoo shall deliver a minimum of [***] page views of the
     Included Pages, ("Total Page Views") and shall use reasonable efforts to
     deliver such Total Page Views in accordance with the following schedule:

(5/14/99 - 12/31/99, "Period 1")(1/1/00-6/30/00) ("Period 2")
- -------------------------------------------------------------
[***]% ([***] page views)       [***]% ([***] page views)


(7/1/00-12/31/00) ("Period 3")
- ------------------------------
[***]% ([***] page views)

(includes all EZ Venture clicks)

     In the event Yahoo fails to deliver the percentage of the Total Page Views
     required during Period 1 or 2, Yahoo will "make good" the shortfall during
     the following period, and in the event the failure occurs with respect to
     Period 3, Yahoo will "make good" the shortfall during the six month period
     following the expiration of Period 3.

     (b) Yahoo shall deliver page views of the various Advertiser Links in the
     quantities provided in Exhibit A.

     (c) Yahoo shall deliver [***] page views of the Promotion Link in
     connection with the Promotion provided in accordance with Section 2.1(b)

     (d) Yahoo shall deliver [***] clicks to an offer page in connection with
     the EZ Venture Promotion provided in accordance with Section 2.1(c).

     (e) Yahoo shall deliver [***] emails in accordance with Section 2.1(d)
     during Period 1.

     (f) In the event, by the end of the Term, Yahoo fails to deliver (i) the
     Total Page Views under Section 2.3(a), (ii) the page views provided in
     Sections 2.3(b) and 2.3(c), (iii) the clicks provided in Section 2.3(d), or
     (iv) the Yahoo Delivers email messages provided in Section 2.3(e), Yahoo
     will "make good" the shortfall by extending its obligations in similar
     areas and placement as those described in Section 2.3, as mutually agreed
     upon, beyond the end of the Term until such obligations are satisfied. This
     section 2.3 sets forth the entire liability of Yahoo, and Advertiser's sole
     remedy for Yahoo's breach of its obligations under Section 2.1 or Yahoo's
     failure to deliver the number of page views described in this Sections 2.3.

     2.4 Delivery Statistics. Delivery statistics provided by Yahoo are the
         -------------------
     official, definitive measurements of Yahoo's performance of its delivery
     obligations hereunder (or under any related insertion order). No other such
     statistics (including any provided by Advertiser or a third party ad
     server) shall be accepted by Yahoo. Yahoo represents that the process and
     technology used to generate such statistics have been certified and audited
     by an independent agency.

SECTION 3:  COMPENSATION
            ------------

[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.

                                       4

<PAGE>

     3.1 Slotting Fee and Holding Fee. Advertiser shall pay Yahoo a non-
         ----------------------------
     refundable slotting fee of three million three hundred thousand dollars
     ($3,300,000) and a non-refundable, non-creditable holding fee of seven
     hundred thousand dollars ($700,000) as set forth below. Except for the
     first two payments which shall be made on the dates set forth below, such
     amounts shall be paid to Yahoo within thirty (30) days after receipt of
     invoice submitted in accordance with Section 3.2 below but no earlier than
     the dates set forth below.

<TABLE>
<CAPTION>
<S>                                   <C>
Upon signing of the Agreement:        $500,000
May 14, 1999                          $ 20,000
July 1, 1999                          $280,000
September 15, 1999                    $520,000
December 15, 1999                     $670,000
March 15, 2000                        $670,000
June 15, 2000                         $670,000
September 15, 2000                    $670,000
</TABLE>

     The first seven hundred thousand dollars ($700,000) to be paid are
     designated as a holding fee for the Program ("Holding Fee"). The Holding
     Fee shall be earned by Yahoo as follows:

<TABLE>
<CAPTION>
<S>                                          <C>
May 14, 1999 -- May 31, 1999                 $ 76,000
June 1, 1999 -- June 30, 1999                $156,000
July 1, 1999 - July 31, 1999                 $156,000
August 1, 1999 -- August 31, 1999            $156,000
September 1, 1999 -- September 30, 1999      $156,000
</TABLE>

     If the Launch Date occurs prior to September 30, 1999, the number of days
     between the Launch Date and September 30, 1999 shall be calculated. The
     portion of the Holding Fee corresponding to this number of days (according
     to the schedule above) shall be applied as an additional slotting fee. The
     remaining $3,300,000 of the slotting fee shall be creditable only in
     connection with Section 5.3(d).

     3.2 Payment Information. Except for the first two payments, Yahoo shall
         -------------------
     submit invoices to Advertiser thirty (30) days prior to the date of payment
     set forth above. All scheduled payments pursuant to Sections 3.1 above
     shall be made by Advertiser via wire transfer into Yahoo's main account
     pursuant to the wire transfer instructions set forth on Exhibit D. All
     payments to Yahoo shall be exclusive of sales, use or value-added taxes
     (other than taxes based on Yahoo's net income), which taxes shall be the
     sole responsibility of Advertiser.

     3.3 Late Payments. Any portion of the above payments which has not been
         -------------
     paid to Yahoo on the dates set forth above shall bear interest at the
     lesser of (i) one and one-half percent (1.5%) per month or (ii) the maximum
     amount allowed by law.

SECTION 4: INDEMNIFICATION
- --------------------------



                                       5

<PAGE>

     4.1 Advertiser Indemnification. Advertiser, at its own expense, will
         --------------------------
     indemnify, defend and hold harmless Yahoo and its employees,
     representatives, agents and Affiliates, against any claim, suit, action, or
     other proceeding brought against Yahoo based on or arising from a claim
     that any Advertiser Brand Feature, content, material, product, information,
     software data or service produced, distributed, offered or provided by
     Advertiser, including, without limitation, the distribution of postage, or
     any material presented on any site on the Internet produced, maintained, or
     published by Advertiser, infringes in any manner any copyright, patent,
     trademark, trade secret or any other intellectual property right of any
     third party, is or contains any material or information that is obscene,
     defamatory, libelous, slanderous, or that violates any law or regulation,
     is negligently performed, or otherwise violates or breaches any duty
     toward, or rights of any person or entity, including, without limitation,
     rights of publicity, privacy or personality, or has otherwise resulted in
     any consumer fraud, product liability, tort, breach of contract, injury,
     damage or harm of any kind to any person or entity; provided, however, that
     in any such case: (x) Yahoo provides Advertiser with prompt notice of any
     such claim, (y)Yahoo permits Advertiser to assume and control the defense
     of such action upon Advertiser's written acknowledgment of the obligation
     to indemnify and (z) upon Advertiser's written request, and at no expense
     to Yahoo, Yahoo will provide to Advertiser all available information and
     assistance necessary for Advertiser to defend such claim. Advertiser will
     not enter into any settlement or compromise of any such claim without
     Yahoo's prior written consent, which shall not be unreasonably withheld.
     Advertiser will pay any and all costs, damages, and expenses, including,
     but not limited to, reasonable attorneys' fees and costs awarded against or
     otherwise incurred by Yahoo in connection with or arising from any such
     claim, suit, action or proceeding. The aforementioned indemnification shall
     not apply to the extent such claims (i) are not somehow related to this
     Agreement, (ii) have occurred as a result of Yahoo breaching its
     obligations under this Agreement or (iii) have occurred as a result of
     Yahoo modifying, without Advertiser authorization, Advertiser materials
     provided by Advertiser pursuant to this Agreement.

     4.2  Limitation of Liability.
          -----------------------

     EXCEPT AS PROVIDED IN THIS SECTION 4, UNDER NO CIRCUMSTANCES SHALL
     ADVERTISER, YAHOO, OR ANY AFFILIATE BE LIABLE TO THE OTHER PARTY FOR
     INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL OR EXEMPLARY DAMAGES ARISING
     FROM THIS AGREEMENT, EVEN IF THAT PARTY HAS BEEN ADVISED OF THE POSSIBILITY
     OF SUCH DAMAGES, SUCH AS, BUT NOT LIMITED TO, LOSS OF REVENUE OR
     ANTICIPATED PROFITS OR LOST BUSINESS.

SECTION 5: TERM AND TERMINATION
- -------------------------------

     5.1 Term and Renewals. The Term of this Agreement shall commence on May 14,
         -----------------
     1999 and expire on December 31, 2000, unless earlier terminated as provided
     in this Agreement.

                                       6

<PAGE>

     5.2 Termination for Cause. This Agreement may be terminated at any time by
         ----------------------
     either party: (i) immediately upon written notice if the other party: (a)
     is declared insolvent by an administrative party; (b) files a petition in
     bankruptcy; or (c) makes an assignment for the benefit of its creditors; or
     (ii) upon the expiration of thirty (30) days after written notice to the
     other party of such other party's breach of any of its obligations under
     this Agreement in any material respect (ten (10) days in the case of a
     failure to pay), which breach is not remedied within such thirty (30) or
     ten (10) day period as applicable. Failure to make payments as set forth
     herein shall be deemed a material breach of this Agreement giving rise to
     the notice and cure provisions set forth above and the right by Yahoo to
     suspend performance hereunder until such breach is cured. Any termination
     pursuant to Section 5.2 shall be without any liability or obligation of the
     terminating party, other than with respect to any breach of this Agreement
     prior to termination. For the avoidance of doubt, if this Agreement is
     terminated by Advertiser for Yahoo's breach, Advertiser shall have no
     obligation to make any payments payable after the date of termination.
     However, Slotting Fee payments made prior to the date of termination
     representing page views not delivered or foregone (as calculated on a daily
     basis per the schedule provided in 2.3(a)) shall not be refunded, but shall
     be creditable against Advertiser's future placements of advertising,
     promotions, email deliveries, hyperlinks and any other related services
     made available by Yahoo to third parties or Advertiser from time to time
     based on availability and then current rates ). The first $200,000 of any
     such credits must be applied by June 30, 2000 and any remaining credits
     must be applied prior to December 31, 2000.

     5.3  Pro-ration Periods.
          ------------------

          (a)  First Pro-ration Period. This Agreement is being executed with
               -----------------------
               the understanding that by July 15, 1999, Advertiser shall have
               secured the appropriate clearances and licenses in the United
               States to legally sell electronic postage and electronic postage
               software ("USPS PC Postage Certification"), and shall be
               technically and operationally able to conduct commerce on
               Advertiser Site on a nationwide scale (along with this
               certification, "Fully Operational"). In the event Advertiser is
               not Fully Operational by September 30, 1999, both parties shall
               mutually agree to a new Launch Date which shall in no event be
               later than December 31, 1999. The period between September 30,
               1999 and such new Launch Date shall be called the "First Pro-
               ration Period".

          (b)  Second Pro-ration Period. In the event Advertiser fails to become
               ------------------------
               Fully Operational by January 1, 2000, one of the following shall
               occur: a) if at least one third party has received USPS PC
               Postage Certification, Yahoo may, at its sole discretion,
               terminate this Agreement, or b) if no third party has received
               USPS PC Postage Certification, the Launch Date shall be extended
               to April 1, 2000 or an earlier date mutually agreed to by the
               parties. The period between the final day of the First Pro-ration
               Period and the new Launch Date shall be called the "Second Pro-
               ration Period". If at any time during the Second Pro-ration
               Period a third party receives USPS PC Postage Certification,
               Yahoo may, at its sole discretion, terminate this Agreement.



                                       7

<PAGE>

          (c)  Pro-ration. During the Pro-ration Periods, Yahoo's obligations
               -----------
               under Section 2.1 shall be suspended and its delivery guarantees
               under Section 2.3 shall be prorated on a daily basis from
               September 30, 1999. Subject to Section 5.2 above, Advertiser's
               payment obligations under Section 3.1 shall not be pro-rated
               during the Pro-ration Period and shall remain in full force and
               effect. For the avoidance of doubt, Advertiser acknowledges and
               agrees that it will forgo all pro-rated page views during the
               Pro-ration Period.
          (d) Termination. In the event this Agreement is terminated by
              Yahoo pursuant to Section 5, Advertiser must fully pay all
              remaining fees pursuant to Section 3 accruing to the end of the
              Term. Such fees are nonrefundable and noncreditable except that in
              the event such termination is pursuant to this Section 5.3,
              Slotting Fees representing page views not delivered or foregone
              (as calculated on a daily basis per the schedule provided in
              2.3(a)) shall be creditable against Advertiser's future placements
              of advertising, promotions, email deliveries, hyperlinks and any
              other related services made available by Yahoo to third parties or
              Advertiser from time to time based on availability and then
              current rates. The first $200,000 of any such credits must be
              applied by June 30, 2000 and any remaining credits must be applied
              prior to December 31, 2000.

     5.4 Exclusive Remedy. The provisions of Sections 5.3(a), (b), (c) and (d)
         ----------------
     shall constitute Yahoo's exclusive remedy and Advertiser's sole liability
     for failure to obtain USPS PC Postage Certification or become Fully
     Operational.

     5.5 Survival. The provisions of Section 3 shall survive termination and
         --------
     expiration of this Agreement except as limited in Section 5.2. The
     provisions of Sections 2.3, 4, 5.3 (d), 7, 8, and 9 shall survive any
     termination or expiration of this Agreement.

SECTION 6: RIGHT OF FIRST PRESENTATION: LIMITED EXCLUSIVITY
- -----------------------------------------------------------

     6.1  Right of First Presentation for Renewal
          ---------------------------------------

          In the event that Yahoo, at its sole discretion, decides to extend
     the program described in Section 2 hereof beyond the Term, Yahoo will
     deliver to Advertiser, at least 30 days prior to the end of the Term, a
     written notice describing the terms and requirements for the extension of
     such program. Yahoo and Advertiser will negotiate in good faith a written
     extension or amendment to this Agreement under reasonable terms and
     conditions. If Advertiser declines to commence negotiations regarding
     such opportunity within ten (10) business days after receiving such
     written notice from Yahoo or if the parties fail to reach agreement
     within ten (10) business days following the commencement of good faith
     negotiations (or such later date as agreed by the parties), Yahoo may
     offer the opportunity to a third party. During the ten day periods set
     forth above, Yahoo may not present an offer of similar nature to any
     third party but shall negotiate exclusively with Advertiser.

     6.2  First Right of Presentation for New Inventory
          ---------------------------------------------

          In the event that Yahoo, in its sole discretion, decides to create,
     acquire, develop or otherwise make available a new online postage related
     promotional opportunity within

                                       8

<PAGE>

     its community properties (e.g., chat, message boards, clubs), Yahoo Address
     Book, new Yahoo Properties (or new portions of existing Yahoo Properties)
     that Yahoo may develop dedicated to software downloads, or explicitly
     targeting the small business or small office/home office markets (e.g.
     "Yahoo! Small Business Travel"), or new portions of the Yahoo Post Office,
     Yahoo shall not make such new promotional opportunity available to
     Advertiser Competitors before first presenting the opportunity to
     Advertiser and, at Advertiser's option, negotiate in good faith a
     definitive agreement under reasonable terms and conditions. Advertiser
     acknowledges that the foregoing applies only to new promotional
     opportunities providing merchant prominence similar to that described
     herein and does not apply to routine promotions and advertisements offered
     in the ordinary course of Yahoo's business. Yahoo shall describe the
     opportunity and Yahoo's reasonable business requirements for the
     opportunity in its written notice to Advertiser. If Advertiser declines to
     commence negotiations with Yahoo regarding the opportunity described in the
     notice within ten (10) business days after receiving such written notice
     from Yahoo, or if the parties fail to execute an agreement or insertion
     order within ten (10) business days following the commencement of good
     faith negotiations (or such later date as is agreed to by the parties),
     Yahoo may offer the opportunity to any Advertiser Competitors. Nothing in
     this Section shall limit Yahoo's right to sell inventory to parties who
     are not Advertiser Competitors. During the ten (10) business day period
     set forth above, Yahoo may not present an offer of similar nature to any
     third party but shall negotiate exclusively with Advertiser.

     6.3  Limited Exclusivity
          -------------------

          During the Term:

          (a)  Yahoo shall not display banners, sponsorships, or other forms of
               advertising of Advertiser Competitors on the Yahoo Post Office,
               or Fixed Category and Keyword Pages (attached as Exhibit B or as
               subsequently amended), the content of which specifically promotes
               electronic postage services or software of Advertiser
               Competitors.

          (b)  Yahoo shall not display the following forms of advertising,
               promoting electronic postage services or software from such
               Advertiser Competitors within Yahoo Small Business property: Text
               Link on the front page, Merchant Spotlight on the Government and
               Human Resources Pages, Button on each page. (with specifications
               substantially similar to specifications of corresponding
               Advertiser Links described on Exhibit A)

          (c)  Yahoo shall not display a text link or button of Advertiser
               Competitors on the Yahoo Address Book specifically promoting
               electronic postage services or software (with text link and
               button specifications substantially similar to specifications of
               corresponding text link described on Exhibit A).

          (d)  Yahoo shall not display a Front Page Promotion Link of an
               Advertiser Competitor specifically promoting electronic postage
               services or software during the period Advertiser is included in
               a Front Page Promotion in accordance with 2.1(b).

          (e)  Yahoo will not display or co-brand content from Advertiser
               Competitors in the Yahoo Post Office.
                           --



                                       9

<PAGE>

     6.4 Limitations. Except as explicitly provided in Section 6.3 above, Yahoo
         -----------
     shall not be precluded from placing advertising, sponsorships or any other
     form of promotional media of any entity, including an Advertiser
     Competitor, on any page in any Yahoo Property. Nothing in this Agreement
     shall preclude Yahoo from honoring its current contracts with Advertiser
     Competitors, the terms of which contracts would otherwise constitute a
     breach of the obligations of Yahoo; provided that Yahoo will not renew such
     contracts upon the expiration of the applicable term. Yahoo shall not be
     precluded from including links to any person or entity in any directory or
     merchant listing (including links to Advertiser Competitors) on any page in
     the Yahoo Properties nor shall Yahoo be precluded from integrating any
     editorial content or web site listings anywhere in the Yahoo Properties
     included but not limited to the Yahoo Post Office. Except as expressly set
     forth in this Agreement, Yahoo shall not be restricted from conducting its
     normal course of business with Advertiser Competitors. Yahoo shall not be
     precluded from promoting or advertising any Yahoo Property anywhere in the
     Yahoo Properties.

SECTION 7: CONFIDENTIAL INFORMATION AND PUBLICITY.
- --------------------------------------------------

     7.1 Confidentiality. The terms and conditions of this Agreement shall be
         ---------------
     considered confidential and shall not be disclosed to any third parties
     except to such party's accountants or attorneys, or except as otherwise
     required by law. Neither party shall make any public announcement regarding
     the existence of this Agreement without the other party's prior written
     approval and consent.

     7.2 Publicity. Any and all publicity relating to this Agreement and
         ---------
     subsequent transactions between Yahoo and Advertiser and the method of its
     release shall be approved in advance of the release by both Yahoo and
     Advertiser. Yahoo and Advertiser agree to discuss comarketing efforts for
     the launch of Advertiser nationwide service and the Yahoo! Post Office. The
     parties agree to issue a mutually agreed upon press release announcing the
     parties' relationship hereunder.

     7.3 Privacy of User Information. Advertiser shall ensure that all
         ---------------------------
     information provided by users of the Advertiser Site is maintained,
     accessed and transmitted in a secure environment and in compliance with
     security specifications to be mutually agreed upon by the parties. On the
     Jump Page, Advertiser shall provide a link to its policy (or to Yahoo's
     policy) regarding the protection of user data.

SECTION 8: ADDITIONAL TERMS
- ---------------------------

     8.1 Exclusion of Yahoo Competitors from the Advertiser Site. In no event
         -------------------------------------------------------
     shall any Jump Page, nor any page of Advertiser's electronic postage
     software provided by Advertiser to users who accessed Advertiser Site
     through an Advertiser Link contain graphic or textual hyperlinks,
     promotion, logos or advertising banners of any principal competitor of
     Yahoo. The agreed upon competitors at the Effective Date are Amazon,
     Excite, Lycos, AOL, CNET, Snap, Netscape, Microsoft (excluding links or
     mentions of Advertiser integration with Microsoft desktop applications such
     as Word, Outlook and Internet Explorer), Disney, NBC and Infoseek [and
     their successors and affiliated sites



                                       10

<PAGE>

     with respect to Jump Pages only]. From time to time, but no more than one
     time per calendar quarter, Yahoo may request additions to this list of
     Yahoo's competitors. Such companies shall be included as Yahoo's
     Competitors upon Advertiser approval, which shall not be unreasonably
     withheld, provided that Advertiser may honor any agreements with such newly
     designated Yahoo Competitors entered into prior to such designation.

     8.2 Link-back to Yahoo. Advertiser shall place a Yahoo graphic link on all
         ------------------
     pages to which users Click-through (including Jump Pages). Such Yahoo
     graphic link shall (a) be placed on such page in a manner mutually agreed
     (b) contain the Yahoo name and logo as provided by Yahoo and (c) directly
     link the user back to a page designated by Yahoo.

     8.3 Speed and Performance of Advertiser Site. The Advertiser Site shall
         ----------------------------------------
     comply with the speed, scale, and performance requirements mutually agreed
     upon by the parties and in no event less than that provided by the average
     of the top three Advertiser Competitors. Advertiser shall make reasonable
     efforts to ensure that all information provided by users to Advertiser Site
     is maintained, accessed and transmitted in a secure environment.

     8.4 Quality of Service This Agreement may be terminated by Yahoo upon forty
         ------------------
     five (45) days written notice to Advertiser if Advertiser Site is no longer
     within the top three (3) electronic postage merchants as determined, to the
     extent possible over a reasonable amount of time, by independent third-
     parties and in light of the number and quality of customers and product
     offerings and Advertiser fails to cure within 45 days after receipt of such
     notice. At all times following the Launch Date, Advertiser must be able to
     effectively provide online postage services to all qualified (by Advertiser
     and USPS standards) users that sign up.

     8.5 User Data: All information and data provided to Yahoo by users of the
         ---------
     Yahoo Properties or otherwise collected by Yahoo relating to user activity
     on the Yahoo Properties shall be retained by and owned solely by Yahoo. All
     information and data provided by Advertiser users on the Advertiser Site or
     otherwise collected by Advertiser relating to user activity on the
     Advertiser Site shall be retained by and owned solely by Advertiser. Each
     party agrees to use such information only as authorized by the user and
     shall not disclose, sell, license, or otherwise transfer any such
     information to any third party (except as required by the U.S. Post Office
     or other governmental authorities or by law) or use the user information
     for the transmission of "junk mail", "spam", or any other unsolicited mass
     distribution of information.

     8.6 License by Advertiser. Advertiser hereby grants to Yahoo a limited,
         ---------------------
     non-transferable, non-exclusive, worldwide, fully paid license to use,
     reproduce and display the Advertiser Brand Features (i) to indicate the
     location of the Advertiser Links as set forth herein and (ii) in connection
     with the marketing and promotion of Advertiser in the Yahoo Properties as
     set forth herein or agreed by the parties.

     8.7 License by Yahoo. Yahoo hereby grants to Advertiser a limited, non-
         ----------------
     transferable, non-exclusive, worldwide, fully paid license to use,
     reproduce and display the Yahoo Brand Features solely for the purpose and
     on the pages of the Advertiser Site as described in Section 8.2 above.



                                       11

<PAGE>

     8.8 Proprietary Rights. As between the parties, each party or its licensors
         ------------------
     and third party information and content providers retains all rights, title
     and interest in and to all of the information, content, data, designs,
     materials and all copyrights, patent rights, trademark rights and other
     proprietary rights thereto provided by it pursuant to this Agreement.
     Except as expressly provided herein, no other right or license with respect
     to any copyrights, patent rights, trademark rights or other proprietary
     rights is granted under this Agreement. All rights not expressly granted
     hereunder by a party are expressly reserved to such party and its licensor
     and information and content providers.

     8.9 Advertiser Content. Yahoo! may, in its sole discretion, include content
         ------------------
     on Yahoo Post Office such as zip codes, post office hours of operation, and
     mailing tips. Yahoo agrees that in determining which, if any, content to
     include, Yahoo will review and consider content provided by Advertiser
     ("Advertiser Content"). In the event Yahoo chooses to display Advertiser
     content, Yahoo and Advertiser shall discuss and execute a content license
     relating to such content.

     Integration. Yahoo and Advertiser agree to discuss in good faith the
     -----------
     integration of Yahoo! Address Book into the Advertiser online postage
     software. Yahoo and Advertiser also agree to discuss in good faith
     integration of the Advertiser online postage service (HTML version) into
     the Yahoo! Post Office once such version is available. The terms and
     conditions relating to either instance of such integration shall be subject
     to a separate written agreement.

SECTION 9: NOTICE; MISCELLANEOUS PROVISIONS
- -------------------------------------------

     9.1 Notices. All notices, requests and other communications called for by
         -------
     this Agreement shall be deemed to have been given immediately if made by
     telecopy (confirmed by concurrent written notice sent first class U.S.
     mail, postage prepaid), if to Yahoo at 3420 Central Expressway, Santa
     Clara, CA 95051, Fax: (408) 731-3301 Attention: Vice President (e-mail:
     [email protected]), with a copy to its General Counsel (e-
     mail:[email protected]), and if to Advertiser at the physical and
     electronic mail addresses set forth on the signature page of this
     Agreement, or to such other addresses as either party shall specify to the
     other. Notice by any other means shall be deemed made when actually
     received by the party to which notice is provided.

     9.2 Independent Contractors. It is the intention of Yahoo and Advertiser
         -----------------------
     that Yahoo and Advertiser are, and shall be deemed to be, independent
     contractors with respect to the subject matter of this Agreement, and
     nothing contained in this Agreement shall be deemed or construed in any
     manner whatsoever as creating any partnership, joint venture, employment,
     agency, fiduciary or other similar relationship between Yahoo and
     Advertiser.

     9.3 Entire Agreement. This Agreement, together with all Exhibits,
         ----------------
     represents the entire agreement between Yahoo and Advertiser with respect
     to the subject matter hereof and thereof and shall supersede all prior
     agreements and communications of the parties, oral or written, including
     without limitation the Letter of Agreement between Yahoo and Advertiser.


                                       12


<PAGE>

     9.4 Amendment and Waiver. No amendment to, or waiver of, any provision of
         --------------------
     this Agreement shall be effective unless in writing and signed by both
     parties. The waiver by any party of any breach or default shall not
     constitute a waiver of any different or subsequent breach or default.

     9.5  Governing Law. This Agreement shall be governed by and interpreted in
          -------------
     accordance with the laws of the State of California without regard to the
     conflicts of laws principles thereof.

     9.6 Successors and Assigns. Neither party shall assign its rights or
         ----------------------
     obligations under this Agreement without the prior written consent of the
     other party, which shall not unreasonably be withheld or delayed.
     Notwithstanding the foregoing, either party may assign this Agreement to an
     entity who acquires substantially all of the stock or assets of a party to
     this Agreement; provided that consent will be required in the event that
     the non-assigning party reasonably determines that the assignee will not
     have sufficient capital or assets to perform its obligations hereunder, or
     that the assignee is a direct competitor of the non-assigning party. All
     terms and provisions of this Agreement shall be binding upon and inure to
     the benefit of the parties hereto and their respective permitted
     transferees, successors and assigns.

     9.7 Force Majeure. Neither party shall be liable for failure to perform or
         -------------
     delay in performing any obligation (other than the payment of money) under
     this Agreement if such failure or delay is due to fire, flood, earthquake,
     strike, war (declared or undeclared), embargo, blockade, legal prohibition,
     governmental action, riot, insurrection, damage, destruction or any other
     similar cause beyond the control of such party.

     9.8 Severability. If any provision of this Agreement is held to be invalid,
         ------------
     illegal or unenforceable for any reason, such invalidity, illegality or
     unenforceability shall not effect any other provisions of this Agreement,
     and this Agreement shall be construed as if such invalid, illegal or
     unenforceable provision had never been contained herein.

     9.9 Sole Responsibility. Advertiser will remain solely responsible for the
         -------------------
     operation of the Advertiser Site, and Yahoo and/or its Affiliates will
     remain solely responsible for the operation of the Yahoo Properties. Each
     party: (a) acknowledges that the Advertiser Site and the Yahoo Properties
     may be subject to temporary shutdowns due to causes beyond the operating
     party's reasonable control; and (b) subject to the terms of this Agreement,
     retains sole right and control over the programming, content and conduct of
     transactions over its respective Internet-based service.

     9.10 Counterparts. This Agreement may be executed in two counterparts, both
          ------------
     of which taken together shall constitute a single instrument. Execution and
     delivery of this Agreement may be evidenced by facsimile transmission.

     9.11 Authority. Each of Yahoo and Advertiser represents and warrants that
          ---------
     the negotiation and entry of this Agreement will not violate, conflict
     with, interfere with, result in a breach of, or constitute a default under
     any other agreement to which they are a party.

                                       13

<PAGE>

     9.12 Attorneys Fees. The prevailing party in any action to enforce this
          --------------
     Agreement shall be entitled to reimbursement of its expenses, including
     reasonable attorneys' fees.

                                       14

<PAGE>

     9.13 Reincorporation. Following the execution of this Agreement, Yahoo
          ---------------
     intends to reincorporate into Delaware by virtue of a merger of Yahoo into
     a wholly-owned Delaware subsidiary of Yahoo, and such Delaware subsidiary
     will assume the obligations and acquire all rights of Yahoo under this
     Agreement. Accordingly, all references in this Agreement to "Yahoo" shall,
     to the extent applicable, be deemed to include Yahoo's successor in
     interest as a result of the reincorporation.

(Signature page follows)
- ------------------------

                                       15

<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
by their duly authorized representatives as of the date first written above.

YAHOO! INC.                               E-STAMP CORPORATION


By: /s/ Signature Illegible                By: /s/ Robert H. Ewald
    ___________________________               ____________________________

Title: SVP                                 Title: PRESIDENT & CEO

Address: ______________________            Address: ______________________

Telecopy: _____________________            Telecopy: _____________________

E-mail: _______________________            E-mail: _______________________

<PAGE>

                                   EXHIBIT A
                                   ---------

                                ADVERTISER LINKS
<TABLE>
<CAPTION>

Advertising Elements
<S>                          <C>                       <C>                              <C>
                                                       Type and Location of
U.S. Based Yahoo Property    URL                       Link on Property                 Number of Page Views


Yahoo! Small Business        smallbusiness.yahoo.com   Text Link - Front Page                     [***]
                                                       Merchant Button - Run
                                                       of Property
                                                       Merchant Spotlight Module-
                                                       Gov't, Human Resources Pages
                                                       Banners - Run of Property
Fixed Category Pages         See Exhibit B             Banners - Run of specific                  [***]
(Details on Exhibit B)                                 category pages
Yahoo! Categories            See Exhibit B             Banners - Run of Business and              [***]
                                                       Economy, Run of Computers and
                                                       Internet
Keywords                     See Exhibit B             Banners - Run of Property                  [***]
(Details on Exhibit B)
Yahoo! People Search         people.yahoo.com          Banners - Run of Property                  [***]
Yahoo! Address Book          address.yahoo.com         Banners - Run of Property                  [***]
Run of Yahoo! Network                                  Banners                                    [***]
Target DMA:
 .  San Francisco
 .  Los Angeles
 .  New York
 .  Chicago
 .  Boston
 .  Washington D.C.
Target Interest:
 .  Small Business
Yahoo! Post Office           TBD                       Module - front page                        [***]
                                                       Merchant Button--all pages
                                                       besides front page
Yahoo! Finance               quote.yahoo.com           Banners                                    [***]
Yahoo! Travel                travel.yahoo.com          Banners                                    [***]
Yahoo! Daily News            dailynews.yahoo.com       Banners                                    [***]
 .  Top Stories (front page)
 .  Business News
 .  Technology News
 .  Policital News
 .  World News
 .  Local News
Yahoo! Weather               weather.yahoo.com         Banners                                    [***]
Yahoo! Message Boards        messages.yahoo.com/yahoo  Banners East Module -Run of                [***]
                             /Business_and_Finance/    Small Business Category
                             Small_Business/index.html
My Yahoo!                    my.yahoo.com              Banners                                    [***]
Target:
 .  Sales/Marketing, or
 .  Self Employed or
 .  Executive/Managerial, or
 .  Small Business Interest, or
 .  Business Interest, or
</TABLE>


[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.


<PAGE>

<TABLE>
<CAPTION>
<S>                             <C>                           <C>                           <C>
* Professionals w/Sm. Business
  Interest
Yahoo! Clubs                     clubs.yahoo.com              Banners                                     [*]
Yahoo! Classifieds/Computers     classifieds.yahoo.com/       Banners                                     [*]
                                 computers.html

Promotional Elements

Yahoo! Front Page Promotion      www.yahoo.com                One promotion                               [*]
EZ Venture                       ezventure.yahoo.com          HTML Page, Guaranteed Clicks         [*] clicks
Yahoo! Direct Mail                                            HTML Page, Email                 [*] Email Sent
</TABLE>
2)   Specifications:
     --------------

     A    The text link on the front page of the Yahoo Small Business property
          referenced above shall: (a) be no longer than 25 characters, (b)
          permit users to navigate directly to the Jump Page, and (c) shall
          first appear as close as practicable to the Launch Date.

     B    The merchant button on the Yahoo Small Business referenced above
          shall: (a) contain a logo with dimensions no larger than 88 pixels
          wide by 31 pixels high (b) have a maximum file size of one and one
          half (1.5) KB, (c) not contain animation and (d) permit users to
          navigate directly to a Jump Page.

     C    The merchant spotlight module on the Government and Human Resources
          page of the Yahoo Small Business referenced above shall: (a) contain a
          logo with dimensions of either 120 pixels wide by 90 pixels high or
          140 pixels wide by 30 pixels high (b) have a maximum file size of 2 K,
          (c) not contain animation, (d) (i) if 120 pixels wide by 90 pixels
          high have 1 text link with a maximum of 25 characters per link to
          appear directly below the image or (ii) if 140 pixels wide by 30
          pixels high have 3 text links with each text link having a maximum of
          25 characters per link, and (e) permit users to navigate directly to a
          Jump Page.

     D    All banner advertisements referenced above shall: (a) promote E-Stamp
          products and services, (b) have dimensions no larger than 468 pixels
          wide by 60 pixels high, (c) not have more than six seconds of
          animation, no 'looping', (d) have a file size of no greater than 12K,
          and (e) will permit users to navigate directly to a Jump Page.

     E    The module on the front page of the Yahoo Post Office referenced above
          shall a) include links to relevant content and/or services, b) include
          links to a Jump Page. E-Stamp shall work with Yahoo to facilitate the
          login and navigation of the E-Stamp site and software for E-Stamp
          users.

          [***] Confidential treatment has been requested for the bracketed
portions. The confidential redacted portion has been omitted and filed
separately with the Securities and Exchange Commission.

<PAGE>

     F    The merchant button on other pages of the Yahoo Post Office shall: (a)
          contain a logo with dimensions no larger than 88 pixels wide by 31
          pixels high (b) have a maximum file size of one and one half (1.5) KB,
          (c) not contain animation and (d) permit users to the Jump Page.

     G    The message board module on Yahoo Small Business referenced above
          shall: (a) contain a logo with dimensions no larger than 120 pixels
          wide by 120 pixels high (b) have a maximum file size of 12 K, (c) may
          contain animation, (d) have 3 text links with a maximum of 20
          characters per link, and (e) permit users to navigate directly to a
          Jump Page.

     H    The text link on the Yahoo Address Book property referenced above
          shall: a) consist of 3 lines of not more than 10 characters each,
          including spaces, (b) no words in all capital letters, c) permit users
          to navigate directly to the Jump Page, and c) are subject to Yahoo's
          approval.

Yahoo Delivers

     I    The guidelines and specifications for the Yahoo Delivers Email
          messages to be delivered in accordance with 2.1(d) are as follows:

          1. a) Advertiser may select up to three targeted qualifiers,
          b) Advertiser may select from Yahoo registration demographics and geo-
          demographic information, c) promotional offer must be valid for a
          minimum of 30 days with expiration date, 30 days from e-mailing date,
          (shorter dates only if approved by Yahoo), d) Yahoo will only track
          mailings for 30 days, e) Advertiser must submit advertising creative
          no less than 5 business days (10 days with 2 or more creative) prior
          to mail date to guarantee timely delivery, f) E-mail all creative to
          [email protected], g) Advertiser must provide Customer
          -----------------------------
          Support contact information so Yahoo can forward support calls, h)
          500,000 e-mails per day maximum

2.   Email message specifications: (a) a single HTML message which is free of
errors and must pass a validation checker, (b) Width of message must not exceed
425 pixels, (c) total page weight must be 30K or less (HTML code plus 6 graphics
or less), (d) animation limited to 6 seconds, no looping, (e) no Java,
JavaScript, frames, ActiveX, or dynamic HTML, (f) no body background image or
color. May use colored tables to simulate a background color, (g) messages
address users as Yahoo! Delivers or as otherwise determined by mutual consent
(e.g. "An exclusive offer for Yahoo! Delivers), h) subject line must be 35
characters or less including YAHOO DELIVERS!, i) subject line cannot mislead
viewer, t) all specifications are subject to Yahoo's! approval.


[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.


<PAGE>

                                   EXHIBIT B

                    CATEGORIES, KEYWORDS AND CATEGORY PAGES

FIXED CATEGORY PAGES

Run_of Category Page:
http://dir.yahoo.com/Business_and_Economy/Companies/Transportation/Shipping/
Postal_Services/

Fixed Category Page:
http://dir.yahoo.com/Business_and_Economy/Companies/
Office_Supplies_and_Services/Mailing_Equipment/Electronic/Stamps/

Fixed Category Page:
http://dir.yahoo.com/Reference/Postal_Information/

Fixed Category Page:
http://dir.yahoo.com/Government/U_S_Government/Agencies/Independent/
United_States_Postal_Service_USPS_/

YAHOO! CATEGORIES (RUN OF):

http://dir.yahoo.com/Business_and_Economy/
http://dir.yahoo.com/Computers_and_Internet/

KEYWORDS
e postage
e stamps
Electronic postage
Electronic stamps
e-postage
estamps
e-stamps
Internet postage
on line postage
on line stamps
online postage
on-line stamps
postage
postage meters
postage stamps
postage rates
postal machines
postal rates
stamp
stamps
zip code


[***] Confidential treatment has been requested for the bracketed portions.
The confidential redacted portion has been omitted and filed separately with
the Securities and Exchange Commission.


<PAGE>

                                   EXHIBIT C

                                INSERTION ORDER

                               YAHOO! MAIN SITE
                          ADVERTISING INSERTION ORDER
                             http://www.yahoo.com
                             --------------------

YAHOO!
     ORDER #                              SALES CONTACT
     REVISION                                     PHONE
     TYPE                                           FAX
     DATE                                         EMAIL

     ADVERTISER                                  AGENCY

     ADDRESS                                    ADDRESS
     CONTACT                                    CONTACT
     PHONE                                        PHONE
     FAX                                            FAX
     EMAIL                                        EMAIL

**RENEWAL - USE SAME ART __

START DATE:                      END DATE:
CONTRACT LENGTH:

POSITION:
- --------
TOTAL PAGE VIEWS                 TOTAL NET COST
- ----------------                 --------------

OTHER INSTRUCTIONS
- ------------------

TOTAL NET COST/MONTH___________________

TOTAL NET COST__________________         Terms: See Billing Instructions.

                                         BILLING INSTRUCTIONS:
                                         --------------------
                                         Bill to Advertiser.
                                         First month due in advance; net 30
                                         after first month.
                                         -----------------

MATERIALS: Banners: Banner requirements are posted at
http://www.yahoo.com/docs/advertising.
DELIVERY: All materials and any changes must be delivered at least 4 business
days in advance to the email address specified for your region at :
http://www.yahoo.com/docs/advertising/submit.html. A Yahoo! insertion order
- -------------------------------------------------
number and flight dates must be referenced in all correspondence. Yahoo! will
not issue any credit or makegood due to incorrectly submitted banners and/or
incomplete information.

<PAGE>

TERMS AND CONDITIONS: This insertion order is subject to the terms and
- --------------------
conditions ("Standard Terms") attached hereto as Exhibit A of this Insertion
Order, and such Standard Terms are made a part of this insertion order by
reference. The signatory of this Insertion Order represents that he has read and
agrees to such Standard Terms.

This insertion order is valid for three (3) business days from the date of this
order. This agreement is non-cancelable.



AUTHORIZED BY:________________________  PHONE:_____________
DATE:_______________
PRODUCTION CONTACT:_______________________  PHONE:_____________
DATE:_____________

PLEASE RETURN TO YAHOO! SALES OPERATIONS DEPT.  FAX # (408) 731-3492
Yahoo! Inc.
3400 Central Expressway, Suite 201
Santa Clara, CA 95051

<PAGE>

                                   EXHIBIT D

                               WIRE INSTRUCTIONS

Yahoo's Bank Information:

Institution Name:             [***]
Institution Address:          [***]
ABA:                          [***]
Beneficiary Name:             [***]
Beneficiary Account Number:   [***]



*** Confidential treatment has been requested for the bracketed portions. The
    confidential redacted portion has been omitted and filed separately with
    the Securities and Exchange Commission.
<PAGE>

                                   EXHIBIT E

                                  EZ VENTURE

EZVENTURE: MATERIALS SPECS AND DUE DATES

NOTE: This is a general overview of the promotion's ad specs. When your
insertion order is completed, you will receive a customized version with the
game icon (gif) attached.

Welcome to Yahoo!'s EZVenture! Please take a few minutes to review this
information, which details all the program basics.

WHAT IS IT? (http://play.ezventure.com/ezv/restart.htm)
            -------------------------------------------

EZVenture is a Yahoo! owned and operated promotion targeted at small businesses.
In association with Fast Company, relevant business articles are intertwined
with offers from advertisers.

CLIENT DELIVERABLES

Note: All deliverables are due every Friday, 12:00 PM EST. New campaigns "go
live" every Wednesday.

UP TO 3 AD BANNERS AND REDIRECT URLS:

EZVenture contains a banner rotation at the top of each content page. Clients
may submit up to 3 each 468 X 60 banners and redirect URLs. Maximum file size
for each banner is 12K, animation permitted up to 6 seconds. No looping. No html
banners.

UP TO 3 OFFER PAGE URLS:

Yahoo! has final approval on all client creative submitted. If file size and
creative does not meet Yahoo! specifications, we reserve the right to reject
any/all deliverables.

Offer pages are hosted by the advertiser (your opportunity to dazzle users with
special offers, online discounts, or additional sweepstakes). These pages are
linked with EZVenture articles and will include a "Win It" sweepstakes button
which users click on to continue through EZVenture. Offer pages must not exceed
30K to optimize Yahoo!'s fast page loading standards.

Note: every offer page must include the attached button. If the button does not
appear on the offer page, Yahoo! will remove the page until the button is re-
positioned.

Your redirect URL for the button will be assigned to you when your completed
insertion order is received.

<PAGE>

EMAIL INSERTS (RESTRICTED TO CERTAIN PACKAGES)

Promotion focused e-mail messaging is sent once per week on Wednesday and
includes article content updates, scoring information, and 1-3 sponsor messages.
Multi Sponsor e-mail messages are 30 words long and placed in the center of the
message. Note that your e-mail messaging may be used to promote your poll
question and poll results.

[Note: Yahoo! does not report open or click-through statistics from emails.]

POLL QUESTIONS (RESTRICTED TO CERTAIN PACKAGES)

Poll questions are rotated each week and consist of one question and three
multiple choice answers. The results of your poll will be posted for players to
view for one week once the poll has completed its run.

Please deliver:

     *  1 Question (20 words)
     *  3 Answers (5 words per answer)

REPORTING:

Once per week, Yahoo! will send you a report that includes:
     *  # of clicks delivered per offer page (broken down by day)
     *  Impressions and click-throughs from your banner
     *  The number of email inserts sent (if applicable)

TERMS AND CONDITIONS

BACK BUTTON

The back button on sponsors' offer pages must be enabled. However, there is no
back button requirement for any pages deeper in sponsors' sites.

BANNER ADS

     *  Banners in EZVenture can link to the offer page or anywhere else on
        the sponsor's site.
     *  Up to three banner ads can be rotated. Impressions and click-throughs
        from the banners are included in the weekly report.
     *  Third party ad banner serving is not allowed.
     *  Clients may submit new offer page/banner creative each week with the
        same deliverable timeline as stated above.
     *  There is no opt-in feature under the banner ads in EZVenture

OFFER PAGE TESTING

EZVenture is not capable of testing multiple offer pages simultaneously.

<PAGE>

TARGETING

Sponsors cannot target by age, gender, zip code, job function, or company size.
All click-throughs and email inserts are directed to the entire EZVenture
database.

BROWSER SPAWNING

The offer page is not permitted to spawn a new browser window when users click
back into the promotion.

INTERSTITIAL

Sponsor interstitial between offer pages and game pages are not permitted.

COMPETITIVE ADVERTISING

Offer pages may not feature banner ads from Yahoo's online portal competitors.

CONTACTS FOR QUESTIONS AND COMMENTS:
Questions about ad specifications go directly to:
Katherine Ho, Yahoo! Promotion Supervisor.
[email protected]
(408) 616-3775


<PAGE>

                                   EXHIBIT F

                              ADVERTISING POLICIES
Manner of transmission to Yahoo!: Estamp shall submit all artwork (banners, HTML
emails, modules, buttons etc.) via email to: [email protected] please "cc"
[email protected] point
                                                               -----

Lead time prior to publication: New banner submission should be at least (4)
four business days prior to the agreed upon "live" date. A change of any
creative should be submitted at least (4) four business days prior to the
agreed upon change date. All other creative, including creative for front page
promotions and HTML pages for email require submission (7) seven business days
prior to the agreed upon "live" date.

Content/creative: content and creative must be reviewed and approved by Yahoo!
prior to being put on our site. Please refer to our advertising resource center
for specifications on the different types of creative allowed on Yahoo!
https://sales.yahoo.com/mediakit/Sales/ops/front page.html
- ----------------------------------------------------------

Promotions: please refer to
http://www.yahoo.com/docs/advertising/body.html#banner specs for details
- ------------------------------------------------------------
regarding building and having Yahoo! host your Front Page Promotion.






<PAGE>

                                                                 Exhibit 10.19
                                August 2, 1999


Mr. Don Hutchinson
SVP & GM @ Work Division
Excite@Home
- -----------
450 Broadway Street
Redwood City, CA 94063

Re:  Letter Agreement

Dear Mr. Hutchinson:

     This letter confirms the preliminary terms and conditions of an agreement
between E-Stamp Corporation ("E-Stamp") and AtHome Corporation, acting through
its @Work division ("@Work"), effective as of the date first written above
("Effective Date") regarding a business relationship between the parties
("Letter Agreement"). Upon execution of this letter, the parties will pursue the
negotiation and execution of a written agreement setting forth the definitive
terms and conditions governing such a business arrangement (the "Definitive
Agreement").

     The parties agree as follows:

     1.   This Letter Agreement shall be binding with respect to those matters
set forth herein; which will be addressed in greater detail and may be
supplemented in the Definitive Agreement, which the parties will negotiate in
good faith with the objective of entering into and signing the Definitive
Agreement on or before August 31, 1999.

     2.   The following constitutes the parties' present understanding regarding
E-Stamp's provision of Internet postage on @Work's business portal to be called
"Work.com" and the creation of a co-branded business-oriented post office and
services channel for Work.com, which the Definitive Agreement will address in
greater detail:

          (a)  E-Stamp will become the "preferred provider" of Internet postage
on Work.com.

<PAGE>

____________________
August 2, 1999
Page 2


          (b)  E-Stamp will build, host and operate a co-branded business post
office and services channel (the "Co-branded Site") for Work.com.

          (c) The Co-branded Site with include Work.com and E-Stamp branding.
@Work's business portal brand (Work.com) will be the predominant brand
represented on the co-branded site, and @Work and E-Stamp will mutually agree on
those requirements. @Work will provide E-Stamp with the specifications and E-
Stamp will be responsible for integrating the co-brand elements into the Co-
branded Site. The "look and feel" of the Co-Branded Site will be consistent with
the "look and feel" of Work.com, and @Work will have final right of approval
over the branding and the overall "look and feel" of the Co-branded Site. E-
Stamp will provide all support necessary to create the Co-branded Site in time
for the September 15, 1999 launch of Work.com subject to conditions and delays
not within E-Stamp's control. The URL of the co-branded post office site will be
specified by @Work (e.g. postage.work.com).

          (d)   At @Work's request, E-Stamp will at its own expense perform the
development required to integrate with the Excite@Home Universal Registration
System (URS). Such integration will allow Excite@Home to capture user profile
information (e.g., name, e-mail address, basic demographics, etc.) which E-Stamp
captures from users coming to the Co-branded Site. Until such time that the URS
integration is complete and thereafter to the extent that data is collected
from users outside the URS, E-Stamp will (i) provide to Excite@Home all User
Data, as defined below, in connection with this Agreement within thirty (30)
days after the end of each calendar month in a format to be mutually agreed upon
by the parties, and (ii) work with @Work to ensure User Data capture such that
the data can be integrated into @Work's user databases. User Data collected in
the Co-branded Site will be jointly owned by E-Stamp and @Work. During the term
                                                         -----
of the agreement and for twelve (12) months thereafter, E-Stamp agrees that (i)
it will not use User Data to market products or services that are in any way
competitive to the products or services of Excite@Home or any of its affiliates;
                                           -----------
(ii) it will always give Users an "opt out" choice to not receive marketing
materials from E-Stamp in the future; (iii) Excite@Home will have the right to
                                            -----------
pre-approve in writing all communications targeted specifically at Excite@Home
                                                                   -----------
or Work.com users; and (iv) it will not sell

<PAGE>

____________________
August 2, 1999
Page 3

User Data to any third party. Both parties agree that none of the above terms
will obligate either party to violate any existing data privacy commitments or
obligations, and E-Stamp agrees to abide by @Work's privacy policies as amended
from time to time. "User Data" means all information submitted on the Co-branded
Site to E-Stamp or @Work, and all information submitted by @Work's (or its
affiliates') registered users, whether or not submitted on the Co-branded Site.

          (e)   E-Stamp will make available the core postal supplies products
that it offers on E-Stamp's direct web site for inclusion (at @Work's
discretion) in any Master Product database, which Excite@Home or any of its
controlled or foreign affiliates develops and maintains. E-Stamp will help to
develop the tools required to update this product information in a timely
fashion.

          (f)   E-Stamp will pay @Work $6,000,000 over the 30-month period
beginning from the date of this letter, with the initial nonrefundable
$250,000 payment due on September 1, 1999. E-Stamp will pay the balance in
equal monthly nonrefundable installments starting with the launch of Work.com.
E-Stamp will not be obligated to make any subsequent payments (beyond the
initial $250,000 payment) until the launch of Work.com.

          (g)   The $6,000,000 payment is consideration for the right to be the
preferred provider of Internet Postage (i.e., E-Stamp's core postal offering) on
Work.com and for an aggregate of [***] impressions over the term of the
agreement. The impressions will be allocated across Work.com as follows:

          [***] banner impressions ($2M)
          [***] sponsorship box impressions ($2M)
          [***] text link/tool box impressions ($2M)

          (h)   The text link and tool box impressions represent the predominant
display of links to the Co-branded Site throughout Work.com. In addition, @Work
will not sell text link, tool box and sponsorship box impressions on Work.com to
other companies for whom Internet postage represents the largest source of
revenue. These considerations reflect E-Stamp's preferred provider status.

*** Confidential treatment has been requested for the bracketed portions. The
    confidential redacted portion has been omitted and filed separately with the
    Securities and Exchange Commission.

<PAGE>

_______________________
August 2, 1999
Page 4



          (i) If, after six months, E-Stamp (after discussions with @Work)
desires exposure on Excite.com, up to $1M of the Work.com banner and/or
sponsorship box impressions noted above may be used for similarly priced banner
and/or sponsorship box impressions on Excite.com. These impressions will be
spread over the remainder of the term of the contract.

          (j)   Within two weeks of the one year anniversary of Work.com's
launch, @Work and E-Stamp will meet to review results of the E-Stamp
promotional efforts outlined in this Section 2. If @Work fails to deliver
[***] E-Stamp impressions on Work.com (in approximately the following ratio:
[***]% banners; [***]% sponsorship boxes; and [***]% text link/tool box during
the first twelve (12) months following Work.com's launch, @Work will have
three additional months to make up any "Shortfall" with impressions on
Work.com that are of the same quantity and of equal or greater value to E-
Stamp as the undelivered impressions that comprise the Shortfall. During this
three month make-up period, @Work will deliver the required impression
commitment under the Agreement plus the Shortfall impressions. If after the
additional three month period (i.e., 15 months from the Work.com launch date),
@Work is unable to generate the necessary E-Stamp impressions on Work.com,
then E-Stamp will have the right to terminate the Agreement upon written
notice to @Work. Upon termination, E-Stamp will no longer be obligated to make
any additional payments as outlined in Section 2.(f). "Shortfall" shall mean
the difference between [***} impressions and the actual number of impressions
delivered by Excite@Home at the one-year anniversary of the Agreement.

          (k)   @Work will sell and serve the ad banners on the Co-branded Site
and will retain 70% of such ad revenues (after an allowance for the direct
sales costs which @Work incurs for serving the ads; but such costs will not
exceed 20% of gross ad revenues). @Work will pay to E-Stamp its portion of
such ad revenues within thirty (30) days following the end of any calendar
month. Such payments shall include a report in a reasonable amount of detail
setting forth the amount of gross ad revenues for such month and the amount and
nature of deductions from such revenues.


*** Confidential treatment has been requested for the bracketed portions. The
    confidential redacted portion has been omitted and filed separately with the
    Securities and Exchange Commission.

<PAGE>


_________________
August 2, 1999
Page 5

          (l)   Unless the parties otherwise agree in writing, and except for
termination as a result of a material breach by one party which is not cured
within a reasonable period of time as set forth in the Definitive Agreement,
this agreement will expire after an initial term of thirty (30) months from the
Effective Date. The Definitive Agreement will contain a right of first offer for
E-Stamp to renew the Definitive Agreement under similar economic terms.

          (m)   All support related to products or services sold on the
Co-branded Site will be the responsibility of E-Stamp. To the extent reasonably
practicable and commercially feasible, this support will be co-branded in a
manner consistent with the overall co-branding. In cases where E-Stamp is
working with a third party vendor to deliver the product or service, it will be
responsible for coordinating all the above support issues. Such support will be
of the same quality as that provided the customers accessing E-Stamp's retail
site (e.g., www.estamp.com). The Co-branded Site will be generally accessible
from the web twenty-four hours a day, seven days a week, other than for downtime
for reasonable periods for support and maintenance of the Co-branded Site or
downtime resulting from causes beyond E-Stamp's control.

          (n)   @Work will support publicly the @Work/E-Stamp relationship. This
public relations support will include mention of E-Stamp as @Work's preferred
provider of Internet postage for Work.com. E-Stamp and @Work will have joint
approval over all publicity related to the @Work/E-Stamp relationship.

          (o)   Throughout the term of the contract, E-Stamp will (i) continue
to make available to @Work the latest version of E-Stamp's product and service
portfolio for inclusion (at @Work's discretion) on Work.com; and (ii) maintain
the Co-branded Site at the level of performance and functionality (including
without limitation breadth and depth of product and service offerings)
maintained by E-Stamp on its web site available at www.estamp.com as of the
Effective Date; and (iii) continue to integrate the latest features and
functionality as used on competitive and comparable web sites, including
(without limitation) back-end security, transaction mechanisms, customer
service, user interface enhancements.
<PAGE>

________________
August 2, 1999
Page 6


          (p)   E-Stamp agrees that @Work will be considered a preferred
business portal and commercial ISP partner. As such, E-Stamp agrees to work with
@Work to promote @Work's business portal, hosting and Internet access services
in select E-Stamp marketing efforts.

          (q)   Both parties acknowledge that any individual use of the Internet
could be a customer of E-Stamp or @Work through activities unrelated to this
Letter Agreement. Except as provided in this Letter Agreement, both parties
further acknowledge that any User Data gathered independent of this Letter
Agreement, even for customers who independently use both parties' services,
shall not be covered by this Agreement. The parties will jointly own User Data
captured as a part of this relationship. Both parties agreed that this joint
ownership will not obligate either party to violate any existing data privacy
commitments or obligations. "@Work Data" means information collected by @Work
outside of the Co-branded Site and provided to E-Stamp by @Work. @Work shall
retain ownership of all @Work Data. "E-Stamp Data" means information collected
by E-Stamp outside of the Co-branded Site. E-Stamp shall retain ownership of all
E-Stamp data.

          (r)   The business relationship contemplated by this letter is not
exclusive for either party.

          (s)   The parties agree to keep the terms of this letter confidential.

     3.   The Definitive Agreement will at a minimum contain provisions in
paragraph 2 and may also contain additional provisions.

     4.   The parties expressly acknowledge and agree that any rights or
obligations set forth in this letter are expressly conditioned upon E-Stamp
receiving approvals from the United States Postal Service to offer its Internet
postage service on a nationwide basis.  As between the parties, E-Stamp will be
solely responsible for acquiring all necessary consents and approvals related to
its offering an Internet postage service on a nationwide basis.

     5.   Each party will bear its own costs and expenses in connection with its
performance of this letter and negotiation and preparation of the Definitive
Agreement.
<PAGE>

________________
August 2, 1999
Page 7


     6.   The Definitive Agreement will include customary representation,
warranty and indemnity provisions from each party regarding the Co-branded Site
and the products and services offered by E-Stamp, including a warranty by E-
Stamp that the Co-branded Site will be fully Year 2000 compliant and a warranty
from @Work that the @Home service will be fully Year 2000 compliant.

     7.   The Definitive Agreement will include customary limitations of
liability provisions which will include a mutual waiver of consequential and
similar damages as well as a mutual overall cap on the liability of either
party.  Excluded from such waiver and cap will be the indemnity obligations of
E-Stamp and @Work.

     8.   This letter shall not be assignable or transferable by either party
without the prior written consent of the other party, except that either party
may assign this letter by operation of law or to any entity acquiring
substantially all of the assignor's assets.  A public offering of either party's
stock shall not constitute an assignment for purposes of this letter. This
letter shall be governed by the laws of the state of California, excluding that
body of law known as conflicts of laws.

     9.   This letter represents the parties' entire understanding with respect
to the arrangement between them, and supersedes all prior writings,
understandings and agreements, if any, between them relating to the proposed
business arrangement and other matters addressed herein.  The parties hereby
acknowledge their intention to proceed to execution of the Definitive Agreement
as indicated in this letter. Upon execution, the Definitive Agreement shall
supersede the terms contained in this letter.

     Please acknowledge @Work's acceptance of the foregoing by signing in the
space provided below and returning a signed copy to us as soon as possible.  If
@Work does not accept any of the foregoing, please call me so that we can
discuss your concerns.

     Thank you for your cooperation and attention to this matter.  We look
forward to the successful negotiation of the Definitive Agreement.

     Sincerely,
<PAGE>

________________
August 2, 1999
Page 8



     E-Stamp Corporation


     /s/ Robert H. Ewald
     -----------------------------
     Title: Pres. & CEO
            ----------------------



     ACKNOWLEDGED AND AGREED:

     AtHome Corporation



     By: /s/ DH (by Eric von Miltenburg for Dan Hutchison)
         -------------------------
     Title: SVP & GM @Work
            ----------------------
     Date:  8/2/99
            ----------------------





<PAGE>

                                                                 Exhibit 10.20

                  PLATINUM PREMIERE PARTNER PACKAGE AGREEMENT

     This Platinum Premiere Partner Package Agreement (the "Agreement"),
effective as of June 25, 1999 (the "Effective Date"), is made and entered into
by and between EarthLink Network, Inc. and its wholly owned subsidiary EarthLink
Operations, Inc. (collectively referred to herein as "EarthLink"), a Delaware
corporation, having an office at 3100 New York Drive, Pasadena, California
91107, and E-Stamp Corporation ("E-Stamp"), a Delaware corporation having an
office at 2855 Campus Drive, Suite 100, San Mateo, California 94403.

                                   RECITALS

     WHEREAS, EarthLink is an Internet service provider which owns, licenses,
operates or distributes online information, communication, and transaction
services through its Internet access service.

     WHEREAS, E-Stamp is a provider of online postage purchasing services that
owns, operates and maintains the E-Stamp Site, through which E-Stamp provides,
among other things, the Services;

     WHEREAS, EarthLink desires (i) that E-Stamp provide the Services through
the Co-Branded Site to EarthLink Members as the default online provider of the
Services on the EarthLink Personal Start Page, and (ii) to provide links from
the EarthLink Site to the Co-Branded Site so that EarthLink Members may access
such Services: and

     WHEREAS, E-Stamp desires to provide the Services through the Co-Branded
Site to EarthLink Members as the default online provider of the Services on the
EarthLink Personal Start Page and through links from the EarthLink Site to the
Co-Branded Site.

     NOW, THEREFORE, in consideration of the mutual promises contained herein,
EarthLink and E-Stamp agree as follows:

                                     TERMS

1.   DEFINITIONS.  The following definitions shall apply to the Agreement:
     -----------

     1.1  "Affiliate" means, with respect to either party, any person or entity
at any time Controlling, Controlled by or under common Control with that party.

     1.2  "Banner Advertisement" means a rotating or permanent banner
advertisement located on the EarthLink Site no smaller than 468 pixels by 60
pixels (or such other dimensions as the parties may agree upon), which permits
users to navigate directly to a page on the Co-Branded Site selected by E-Stamp
(and subject to EarthLink's reasonable approval).

     1.3  "Change in Control" shall have the meaning set forth in Section
6.2(d).

     1.4  "Co-Brand" means that a party will cause its Web page to display the
other party's Marks in a manner that is substantially equal to its own Marks
appearing thereon.

     1.5  "Co-Branded Site" means a version of the E-Stamp Site created,
provided and maintained by E-Stamp, which may include a Jump Page, which is Co-
Branded with the EarthLink/Sprint Marks. EarthLink acknowledges and agrees that,
due to United States Postal Service regulations, some areas of the
<PAGE>

Co-Branded Site may not contain the EarthLink/Sprint Marks. Additionally,
EarthLink acknowledges and agrees that the Co-Branded Site will include the
E-Stamp Home Page which will not be Co-Branded with the EarthLink/Sprint Marks,
but which will include the EarthLink/Sprint Marks in the partner area of the
Home Page, as well as Competitive Services brands.

     1.6  "Company Information" means collectively the Confidential Information
and Trade Secrets. Company Information also includes information which has been
disclosed to the disclosing party by a third party that the disclosing party is
obligated to treat as confidential or secret. EarthLink's Company Information
includes, without limitation, the names, contact and financial information
(including, but not limited to credit card information and e-mail addresses) of
EarthLink Members.

     1.7  "Competing Third Party" shall have the meaning set forth in Section
6.2(d).

     1.8  "Control," "Controlling" and "Controlled" means possessing, directly
or indirectly, the power to direct or cause the direction of the management and
policies of an entity or other person, whether through ownership of voting
securities, by contract or otherwise.

     1.9  "Confidential Information" means any and all information related to
the services and/or business of a party that does not constitute a Trade Secret
and that is treated as confidential or secret by the party (that is, it is the
subject of efforts by the disclosing party that are reasonable under the
circumstances to maintain its secrecy) including, but not limited to, the terms
and conditions of this Agreement. "Confidential Information" shall not include
information (a) already lawfully known to or independently developed by the
receiving party, (b) disclosed in published materials, (c) generally known to
the public, or (d) lawfully obtained from any third party without any obligation
of confidentiality.

     1.10 "Customers" means any person or entity who clicks through via an
E-Stamp Icon to the Co-Branded Site from the EarthLink Site, including, without
limitation, from any third party area therein and who thereafter purchases
E-Stamp Internet Postage from the Co-Branded Site, and who subsequently applies
for a US Postal Service postage license. Customers specifically excludes any
person or entity who previously purchased E-Stamp Internet Postage from E-Stamp.
Customer also specifically excludes any person or entity who clicks through
directly to the E-Stamp Site.

     1.11 "Customer Payment" shall have the meaning set forth in Section 2.1(e)
herein.

     1.12 "Distribution Partner" means any entity which has entered into a
distribution agreement with EarthLink and is licensed to distribute or market
the Setup Software.

     1.13 "EarthLink Competitive Services" means any Internet access services,
telephone services (whether long distance, wireless or local), Internet
telephony services, telecommunications services (including without limitation,
ISDN, frame relay, ADSL, etc.), Web hosting services, free e-mail services, or
start page services, except EarthLink and Sprint and those services and products
offered by EarthLink and Sprint. EarthLink's current list of Competitive
Services is located on Exhibit E. EarthLink may update the Competitive Services
list at its reasonable discretion and at any time during the Term, provided
EarthLink provides E-Stamp with the revised list.

     1.14 "EarthLink Member" means any authorized user of the EarthLink/Sprint
Service.

     1.15 "EarthLink Personal Start Page" refers generically to EarthLink's
Personal Start Page, and generally as same may be modified by EarthLink Members
from time to time and in their discretion.

                                      -2-
<PAGE>

     1.16  "EarthLink Premiere Partners" means a third party entering into or
which has entered into an extensive co-promotional partnership with EarthLink
which EarthLink designates its "Premiere Partnership Program" or such other name
as EarthLink may devise from time to time. EarthLink will identify its Premiere
Partners in writing to E-Stamp as needed to implement the terms of this
Agreement.

     1.17  "EarthLink/Sprint Service" means the EarthLink Internet access
service.

     1.18  "EarthLink Site" means, collectively, EarthLink's proprietary Web
site located at www.earthlink.net, the EarthLink Personal Start Page and any
other proprietary pages owned by EarthLink available through www.earthlink.net
(specifically excluding any pages owned or hosted by third parties, regardless
of whether or not they display the EarthLink/Sprint Marks).

     1.19  "E-Stamp Competitive Services" means any Internet postage services or
products.

     1.20  "E-Stamp Home Page" means the page of the E-Stamp site which is known
as E-Stamp's Home Page and which shall be included as the only page of the Co-
Branded Site that contains Competitive Services brands.

     1.21  "E-Stamp Icon" means any graphical or textual icon which is capable
of hyperlinking to the Co-Branded Site, including, but not limited to, any
Banner Advertisements and Promotional Placements.

     1.22  "E-Stamp Internet Postage" means E-Stamp's hardware and software
product allowing an end user to download and print postage on the Internet, as
the same may from time to time be periodically updated, modified, reconfigured,
or put on-line by E-Stamp.

     1.23  "E-Stamp Site" means, collectively, all points of presence and/or
services maintained from time to time by or on behalf of E-Stamp or its
Affiliates on the Internet at (i) the URL www.E-Stamp.com, (and any replacement
or successor thereto) and (ii) such other URLs as E-Stamp may notify EarthLink
from time to time. EarthLink Members who enter the Co-Branded Site will not be
able to link to the E-Stamp Site through promotions located on the Co-Branded
Site.

     1.24  "E-Stamp Software" means the object code version of the E-Stamp
software provided by E-Stamp to EarthLink pursuant to this Agreement, as the
same may be periodically revised by E-Stamp during the Term.

     1.25  "Guaranteed Customers" shall have the meaning set forth in Section
2.2(b).

     1.26  "Initial Term" shall have the meaning set forth in Section 6.1
herein.

     1.27  "Jump Page" means a web page on the Co-Branded Site containing the
EarthLink/Sprint Marks that a user first sees before accessing the front page of
the Co-Branded Site.

     1.28  "Launch Date" shall mean the earlier of (i) the date E-Stamp receives
approval from the US Postal Service to launch the E-Stamp Internet Postage
service nationally, or (ii) ninety (90) days after the Effective Date.

     1.29  "Mall" means that portion of the EarthLink Site currently identified
on the EarthLink Home Page as "the Mall" (or any successor thereto), through
which EarthLink Members may purchase goods and services from third party
vendors.

                                      -3-
<PAGE>

     1.30  "Marks" means any trademark, trade name, service mark, logo, slogan
and copyright and proprietary notices associated with a party's products or
services.

     1.31  "Promotion Fee" has the meaning assigned in Section 2.1(d).

     1.32  "Promotional Placement" means a graphical or text link located on the
EarthLink Site through which users may directly link to a location on the Co-
Branded Site to be determined by E-Stamp (subject to EarthLink's reasonable
approval).

     1.33  "Renewal Term(s)" shall have the meaning set forth in Section 6.1
herein.

     1.34  "Services" shall be limited to (i) presenting through a World Wide
Web site online postage purchasing services to any Internet users which may
visit such site, (ii) providing for the ordering and purchase by such Internet
users of such online postage purchasing services, (iii) providing for the
processing of such ordering and purchasing, and (iv) providing customer support
to such Internet users regarding such online postage purchasing services and
their respective purchasing and ordering thereof.

     1.35  "Setup Software" means EarthLink's "TotalAccess" CD-ROM which is
provided to new EarthLink subscribers to assist in the installation and setup of
software which permits such persons or entities to access the Internet
(including the EarthLink Site), and any successor to such CD-ROM, including
updates, upgrades or new versions thereof.

     1.36  "Sprint" means, collectively, Sprint Corporation and Sprint
Communications Company L.P.

     1.37  "Term" means the Initial Term and any Renewal Term(s) of this
Agreement as defined in Section 6.1 herein.

     1.38  "Territory" means the United States and, as mutually agreed upon by
the parties, other areas.

     1.39  "Trade Secrets" means all non-public information whether tangible or
intangible related to the services or business of the disclosing party that (a)
derives economic value, actual or potential, from not being generally known to
or readily ascertainable by other persons who can obtain economic value from its
disclosure or use, and (b) is the subject of efforts by the disclosing party
that are reasonable under the circumstances to maintain its secrecy, including,
without limitation, (i) marking any information reduced to tangible form clearly
and conspicuously with a legend identifying its confidential or trade secret
nature, (ii) identifying any oral communication as confidential or secret
immediately before, during, or after such oral communication; or (iii) otherwise
treating such information as confidential or secret. Assuming the criteria in
clauses (a) and (b) above are met, Trade Secrets includes information, without
regard to form, including, but not limited to, technical and non-technical data,
formulas, patterns, designs, compilations, computer programs and software,
devices, inventions, methods, techniques, drawings, processes, financial data,
financial plans, product plans, lists of actual or potential customers and
suppliers which are not commonly known by or available to the public, research,
development, and existing and future products.

     1.40  "Year 2000 Compliant" has the meaning assigned in Section 3.2(d)
herein.

                                      -4-
<PAGE>

2.   OBLIGATIONS OF THE PARTIES.
     --------------------------

     2.1  Duties and Obligations of E-Stamp. In connection with this Agreement,
          ---------------------------------
E-Stamp shall have the following duties and obligations:

          (a)  License.  During the Term, and subject to the provisions of
               -------
Section 2.3 herein, E-Stamp grants to EarthLink and each of its Affiliates a
nonexclusive, royalty-free license throughout the Territory to use, reproduce,
display, distribute, and publicly and digitally perform E-Stamp's Marks (as
defined in Exhibit B) in connection with links to or from, or in conjunction
with, the EarthLink Site, or in or on any other media including, but not limited
to any promotional material or any of EarthLink's partners' Web sites, but in
each case only as reasonably necessary for EarthLink to perform as contemplated
by this Agreement.

          (b)  The Services.  E-Stamp shall provide the Services in full
               ------------
compliance with the Service Specifications set forth in Exhibit D hereto through
                                                        ---------
the Co-Branded Site, according to the terms of this Agreement and as the parties
may mutually agree, for offering by EarthLink as the default online provider of
the Services on the EarthLink Personal Start Page.  E-Stamp shall launch the Co-
Branded Site within ten (10) days following the Launch Date.  The Services
located on the EarthLink Personal Start Page shall only link to the Co-Branded
Site.  Subject to Exhibit D, E-Stamp shall design, create, edit, manage, update
and maintain the Co-Branded Site for the purpose of providing EarthLink Members
with access to the Services on a twenty-four (24) hours per day, seven (7) days
per week basis.  Subject to regulatory obligations, E-Stamp shall use
commercially reasonable efforts to ensure that the Services provided on the
EarthLink Personal Start Page and the Co-Branded Site will retain parity with
the Services provided by E-Stamp through the E-Stamp Site in terms of freshness
of content, services and features.  During the Term, E-Stamp agrees to (i) use
commercially reasonable efforts to work with EarthLink to integrate the Services
into the EarthLink Site, subject to such restrictions and/or regulations as may
be required by the United States Postal Service or other regulatory agencies and
(ii) assist EarthLink in a commercially reasonable manner to foster usage and
enjoyment of the Services by EarthLink Members on an on-going basis.

          (c)  Billing, Processing and Collection.  E-Stamp shall be solely
               ----------------------------------
responsible for all processing that arises out of any and all transactions that
are conducted through the Co-Branded Site including, without limitation, any and
all billing, collection, refunding, exchanging of goods and/or services,
crediting, and maintenance of records corresponding to such transactions.
Further, E-Stamp hereby agrees and acknowledges that E-Stamp shall conduct all
such processing in a professional and workmanlike manner, on a timely and
efficient basis.

          (d)  Promotion Fee.  During the Initial Term and provided that
               -------------
EarthLink is not otherwise in material breach or default of this Agreement, E-
Stamp shall pay to EarthLink an annual fee of Four Hundred Twenty One Thousand
Eight Hundred and Seventy Five Dollars ($421,875) (the "Promotion Fee") payable
only in cash as follows: (i) twenty-five percent (25%) on the Effective Date and
on the first day of any Renewal Term, such that, specifically on the Effective
Date and on the first day of any Renewal Term, E-Stamp shall pay to EarthLink
One Hundred Five Thousand Four Hundred and Sixty Nine Dollars ($105,469) as part
of the Promotion Fee; (ii) twenty five percent (25%) within thirty (30) days
following the end of three (3) months after the Launch Date and after the first
day of any Renewal Term; (iii) twenty five percent (25%) within thirty (30) days
following the end of six (6) months after the Launch Date and after the first
day of any Renewal Term; and (iv) twenty five percent (25%) within thirty (30)
days following the end of nine (9) months after the Launch Date and after the
first day of any Renewal Term.

          (e)  Customer Payment. During the Term, E-Stamp shall pay EarthLink in
               ----------------
cash the one-time sum of Seventy Five Dollars ($75) for each Customer generated
under this Agreement in excess of the

                                      -5-
<PAGE>

Guaranteed Customers (the "Customer Payment"). The Customer Payment shall be
paid to EarthLink within thirty (30) days following the end of the applicable
calendar month that such Customers were provided, accompanied by a report from
E-Stamp supporting each Customer Payment and indicating the number of Customers
generated. Such reports shall be prepared by E-Stamp in a manner which makes
them exportable onto an Excel spreadsheet.

          (f)  Customer Support.  E-Stamp shall provide customer and technical
               ----------------
support to EarthLink Members in the same manner as is provided to customers of
E-Stamp acquired through other channels. As of the Effective Date, E-Stamp's
support policy is as follows: unlimited free support via web or toll-free phone
number for installation or product defect-related problems; $35 per incident
for usability-related support issues. Support will be available Monday through
Friday, 6 am - 6 pm Pacific Time. Subject to market and/or customer demand, E-
Stamp reserves the right to modify or change its support policy. Such changes
will be posted at http://www.e-stamp.com/help center/help.html.
                  -------------------------------------------

          (g)  Advertising.  E-Stamp may display advertising and other
               -----------
sponsorships and promotional materials on the Co-Branded Site, and E-Stamp and
will be entitled to collect and retain in full payments resulting therefrom
without liability to EarthLink; provided, however that E-Stamp shall not display
advertising of any kind (cooperative or otherwise) for, or otherwise promote in
any way, any EarthLink Competitive Services on any page of the Co-Branded Site.

          (h)  E-Stamp Pages.  During the Term E-Stamp will include the
               -------------
EarthLink/Sprint Marks in the partner area of the Home Page in a manner at least
as prominent as any other E-Stamp partner's brands appearing thereon.

          (i)  Late Payments. All amounts owed by E-Stamp to EarthLink hereunder
               -------------
not paid when due and payable will bear interest from the date such amounts are
due and payable at the rate of 1% per month (or the maximum rate allowed by law)
to cover EarthLink's costs of collection as well as interest.

          (j)  Premiere Partners.  E-Stamp shall dedicate space near the top of
               -----------------
every page of the Co-Branded Site which space shall be suitably sizable to
incorporate branding for EarthLink Premiere Partners.  E-Stamp shall, upon
mutual agreement and provided that such EarthLink Premier Partner does not
provide online postage, incorporate such EarthLink Premiere Partners branding
into the space referenced above in any or all pages of the Co-Branded Site.  E-
Stamp agrees and acknowledges that EarthLink may from time to time add or remove
such EarthLink Premiere Partners branding from the Co-Branded Site and that E-
Stamp will work together with EarthLink to incorporate any modifications to such
EarthLink Premiere Partners branding.  This presence must include at least one
logo, GIF or HTML link, or branding, and an amount of text which shall be
mutually agreed.  Unless otherwise agreed to by the parties, E-Stamp shall not
be obliged to accept or incorporate any branding other than branding it receives
directly from EarthLink.  E-Stamp will provide EarthLink with design
specifications and file formats within thirty (30) days after the Effective Date
in order to allow EarthLink to generate new EarthLink Premiere Partners
branding.  As between the parties, EarthLink shall bear all responsibility for
designing and producing specific branding, and E-Stamp shall not be required to
place any branding requiring modification or not complying with design
specifications or file formats.  Notwithstanding any other provision in this
Agreement.  E-Stamp will not be required to incorporate into the Co-Branded Site
or otherwise promulgate any branding or other material that would contravene
U.S. Postal Service regulations or other legal requirements, that contains any
material that violates any proprietary or other right of any third party or that
promotes any materials E-Stamp reasonably believes inappropriate for the Co-
Branded Site (including, without limitation, any promotion of tobacco products,
alcoholic beverages, weapons, gambling, or violent or sexually explicit
material).

                                      -6-
<PAGE>

          (k)  User Information.  Under this Agreement, E-Stamp will not send
               ----------------
unsolicited e-mails to any EarthLink Member.  E-Stamp may send promotional email
messages to EarthLink Members who elect to receive such e-mails through a
registration process with E-Stamp through which E-Stamp offers to the EarthLink
Member an opportunity not to receive E-Stamp's promotional e-mail messages, and
each E-Stamp promotional e-mail message will offer to the recipient a means by
which the recipient may unsubscribe to such e-mailing list.  Under no
circumstances will E-Stamp send or allow others to send e-mail messages to
EarthLink Members which promote EarthLink Competitive Services.  E-Stamp will
maintain User Information in accordance with its privacy policy which offers
"opt out" rights, and which can be found at [http://www.e-stamp.com/index.html].
In no event shall E-Stamp offer to any third party a list which would permit
such third party to identify the E-Stamp registrant as an EarthLink Member.
Nothing in this paragraph prohibits E-Stamp from, or restricts E-Stamp
regarding, (i) sending promotional material to persons and entities where names
and contact information are not provided to or acquired by E-Stamp under this
Agreement and (ii) providing such information regarding such persons and
entities to third parties.

          (l)  Audit.  During the Term of the Agreement, and during the one (1)
               -----
year period immediately following the Term, EarthLink shall have the right, upon
ten (10) days notice, during normal business hours and without interfering with
E-Stamp's normal business activities, at EarthLink's own expense, through an
independent auditor chosen by EarthLink, to audit E-Stamp's records that relate
to Customers or payments owed to EarthLink hereunder provided that audits may
not occur more frequently than once every twelve (12) months.  If an audit of
the appropriate records, books of account or logs reveals that E-Stamp has
understated the amounts owed to EarthLink under this Agreement for the period
under audit, then E-Stamp shall promptly pay any amounts owed to EarthLink.  If
the amount of underpayment for the period under audit equals or exceeds five
percent (5%) of the total amount owed during such period, then E-Stamp shall
reimburse EarthLink for all reasonable costs and expenses incurred in connection
with conducting the audit.  EarthLink will treat all information and materials
disclosed to, provided to, observed by or otherwise acquired by EarthLink in
connection with any such audit, as Confidential Information of E-Stamp for
purposes of this Agreement.  EarthLink will not disclose the same to any third
party, or use the same for any purpose other than verification of E-Stamp's
reports delivered to EarthLink under this Agreement.

     2.2  Duties and Obligations of EarthLink. In connection with this
          -----------------------------------
Agreement, EarthLink shall have the following duties and obligations:

          (a)  License.  During the Term, and subject to the provisions of
               -------
Section 2.3, EarthLink grants to E-Stamp a nonexclusive, nonsublicenseable,
nontransferable, fully paid-up license to use, reproduce and display throughout
the Territory the EarthLink/Sprint Marks (as defined in Exhibit A), and any and
all intellectual property rights contained therein on the Co-Branded Site or in
or on promotional material, provided such use is reasonably necessary for E-
Stamp to perform as contemplated by this Agreement.

          (b)  Guaranteed Customers.  During each of the Initial term and any
               --------------------
Renewal Term(s), if any, of this Agreement, EarthLink will provide [***]
guaranteed Customers (the "Guaranteed Customers"). If upon the expiration of any
Initial Term or Renewal Term(s), as applicable, EarthLink fails to provide the
Guaranteed Customers during such Initial Term or Renewal Term(s), then such
Initial Term or Renewal Terms(s) shall be extended until E-Stamp has received,
in the aggregate, the Guaranteed Customers and such failure shall not constitute
a breach of this Agreement; provided, however, that the Initial Term or Renewal
Term(s) shall not be so extended if this Agreement is terminated by EarthLink
early in accordance with Sections 2.3, 3.2(c), 6.2, or Exhibit D of this
                                                       ---------
Agreement. E-Stamp will owe no additional promotional fees of any kind
(including without limitation any fees pursuant to section 2.1(d)) for any
extension of the Initial Term or Renewal Term(s) for the purposes of making up a
shortfall in the number of Guaranteed Customers.

          (c)  Managing the Services.  Throughout the Term, EarthLink will
               ---------------------
provide and maintain the Promotional Placements and Banner Advertisements and
perform the other obligations specified in Exhibit C hereto, in accordance with
                                           ---------
the provisions contained in that Exhibit C and the terms and conditions of this
                                 ---------
Agreement.  E-Stamp acknowledges and agrees that EarthLink has other promotional
programs through which certain partners promote the EarthLink/Sprint Service and
provide new EarthLink Members to EarthLink.  E-Stamp further acknowledges and
agrees that certain promotional partners require the ability to restrict the
advertising that appears on the Personal Start Pages of EarthLink Members
brought to EarthLink through such promotional partner.  Therefore, E-Stamp
agrees that EarthLink retains the right to remove the

                                      -7-
<PAGE>

Services, the Promotional Placements and/or the Banner Advertisements from the
EarthLink Personal Start Page, or move them to a customizable position (at
EarthLink's sole discretion), in the event that a promotional partner of
EarthLink requires that such a deletion or move be made, and then such deletion
or move will only be effective as regards the Personal Start Pages of EarthLink
Members brought to EarthLink through the requesting promotional partner. Such
removal shall not decrease the number of Guaranteed Customers that EarthLink is
obligated to provide pursuant to this Agreement.

          (d)  Audit by E-Stamp.  During the Term of the Agreement, and during
               ----------------
the one (1) year period immediately following the Term, E-Stamp shall have the
right, upon 10 days' notice, during normal business hours and without
interfering with normal business activities, at E-Stamp's own expense, through
an independent auditor chosen by E-Stamp, to audit EarthLink's records that
relate to EarthLink's obligations hereunder, provided that audits may not occur
more frequently than once every twelve (12) months.  If an audit of the
appropriate records, books of account or logs reveals that EarthLink has
overstated the promotional placements delivered to E-Stamp under this Agreement
for the period under audit, then EarthLink shall promptly remedy any such
shortfall.  If the amount of overstatement of promotional placements for the
period under audit equals or exceeds five percent (5%) of the total amount owed
during such period, then EarthLink shall reimburse E-Stamp for all reasonable
costs and expenses incurred in connection with conducting the audit.  E-Stamp
will treat all information and materials disclosed to, provided to, observed by
or otherwise acquired by E-Stamp in connection with any such audit, as
Confidential Information of EarthLink for purposes of this Agreement.  E-Stamp
will not disclose the same to any third party, or use the same for any purpose
other than verification of EarthLink's reports delivered to E-Stamp under this
Agreement.

          (e)  Reports.  Within fifteen (15) days after the last day of each
               -------
calendar month, EarthLink will provide E-Stamp with a monthly report of user
traffic, Promotional Placements, Banner Advertising or other promotions provided
by EarthLink to E-Stamp hereunder.

     2.3  Promotional Material/Press Releases. Each party requires that each use
          -----------------------------------
of its Marks or the Marks of its licensors be in accordance with Exhibit A, in
                                                                 ---------
the case of EarthLink, and Exhibit B, in the case of E-Stamp. Prior to the
                           ---------
initial launch of any Web pages or other Internet locations branded with the
other party's Marks including, but not limited to, the Co-Branded Site or the
release of any marketing, advertising, press releases, or other promotional
materials that reference the other party and/or the other party's Marks, the
releasing party shall submit a written request for approval to the other party
together with a copy of the materials to be released, which request shall be
made no less than ten (10) business days prior to the requested release date
(the other party shall not unreasonably withhold or delay the granting of its
approval thereof). Title to and ownership of the respective owner's Marks shall
remain with the owner. The licensee shall not take any action inconsistent with
the owner's ownership of the Marks and any benefits accruing from use of such
Marks shall automatically vest in the owner. If a licensee's use of the Marks
does not conform to the owner's quality standards in the owner's reasonable
opinion, then the owner will notify the licensee in writing to the licensee of
such nonconformance, and the licensee shall have thirty (30) days to cure such
nonconformance. If the nonconformance is not cured within such period, the owner
may immediately terminate this Agreement upon written notice to the licensee.
The parties will cooperate to Jointly issue a prompt public announcement
regarding this Agreement and the parties' relationship established hereby.

3.   REPRESENTATIONS AND WARRANTIES.
     ------------------------------

     3.1  EarthLink.  EarthLink represents and warrants to E-Stamp that:
          ---------

          (a)  EarthLink has the power and authority to enter into and perform
its obligations under this Agreement.

                                      -8-
<PAGE>

          (b)  EarthLink shall at all times comply with all local, state and
federal laws, rules and regulations applicable to the Co-Branded Site
(including, without limitation, any export control laws of the United States
with respect to the E-Stamp Software);

          (c)  EarthLink has the full and exclusive right to grant or otherwise
permit E-Stamp to access the EarthLink Personal Start Page and to use
EarthLink's Marks, and is aware of no claims by any third parties adverse to any
of such intellectual property rights except for Sprint's ownership of its Marks
contained in the co-branded EarthLink/Sprint Marks.  If E-Stamp's use or
promotion, as provided herein, of any of EarthLink's Marks or products or
services including, without limitation, EarthLink's goods and services
associated therewith ("EarthLink Property") are alleged or held to infringe the
intellectual property rights of a third party, EarthLink shall, at its own
expense, and in its sole discretion, (i) procure for E-Stamp the right to
continue to use the allegedly infringing EarthLink Property or (ii) replace or
modify the EarthLink Property to make it non-infringing; or (iii) if neither
option is possible or economically feasible, request E-Stamp to cease use and
promotion of such EarthLink Property and to thereafter sever the alleged or
infringing EarthLink Property from any obligations with respect to either party
under the Agreement, provided that if the inability to use such intellectual
property would cause a material breach of this Agreement (as determined by E-
Stamp), E-Stamp may immediately terminate this Agreement upon notice to
EarthLink

          (d)  EarthLink warrants and represents that the proprietary components
of EarthLink/Sprint Service contemplated by this Agreement are year 2000
compatible and compliant (i.e., will correctly calculate, compare, sort,
extract, sequence, store and otherwise process, in accordance with the Services'
intended use and applicable specifications, date related information and
associated date calculations for dates before, during and after the year 2000,
and will display date information in ways that are unambiguous as to the
determination of the century).  E-Stamp acknowledges and agrees that the
operation of the EarthLink/Sprint Service is dependent on the operation of third
party network infrastructure and other technology and that EarthLink makes no
representation or warranty with respect thereto.  EarthLink's entire liability,
and E-Stamp's exclusive remedy, for breach of any representation or warranty in
this subparagraph 3.1(d) is limited to repair or replacement of the EarthLink
proprietary, network infrastructure, hardware, software, data, firmware or
systems used in the performance and delivery of the EarthLink/Sprint Service,
that is not Year 2000 Compliant.

     3.2  E-Stamp.  E-Stamp represents and warrants to EarthLink that:
          -------

          (a)  E-Stamp has the power and authority to enter into and perform its
obligations under this Agreement:

          (b)  E-Stamp and the Services shall at all times comply with all
local, state and federal laws, rules and regulations applicable to the Co-
Branded Site, the Services and E-Stamp's performance under this Agreement.

          (c)  E-Stamp has the full and exclusive right to grant or otherwise
permit EarthLink to access the Co-Branded Site, to use the Services and to use
E-Stamp's Marks, and is aware of no claims by any third parties adverse to any
of such intellectual property rights other than as set forth in Exhibit F.  If
EarthLink's use or promotion, as provided herein, of any of E-Stamp's Marks or
products or services including, without limitation, E-Stamp's goods and services
associated therewith ("E-Stamp Property") are alleged or held to infringe the
intellectual property rights of a third party, E-Stamp shall, at its own
expense, and in its sole discretion, (i) procure for EarthLink the right to
continue to use the allegedly infringing E-Stamp Property or (ii replace or
modify the E-Stamp Property to make it non-infringing; or (iii) if neither
option is possible or economically feasible, request EarthLink to cease use and
promotion of such E-Stamp Property and to thereafter sever the alleged or
infringing E-Stamp Property from any obligations with respect to either party
under the Agreement, provided that if the inability to use such intellectual
property would

                                      -9-
<PAGE>

cause a material breach of this Agreement (as determined by EarthLink),
EarthLink my immediately terminate this Agreement upon notice to E-Stamp; and

          (d)  E-Stamp warrants and represents that the proprietary components
of the Services contemplated by this Agreement are Year 2000 Compliant.
EarthLink acknowledges and agrees that the operation of the Services is
dependent on the operation of third party network infrastructure, hardware,
software, data, firmware, systems and other technology and that E-Stamp makes no
representation or warranty with respect thereto. E-Stamp's entire liability, and
EarthLink's exclusive remedy, for breach of any representation or warranty in
this subparagraph 3.2(d) is limited to repair or replacement of the Services or
any and all E-Stamp network infrastructure, hardware, software, data, firmware
or systems used in the performance and delivery of the Services, that is not
Year 2000 Compliant. "Year 2000 Compliant" means able before, during and after
January 1, 2000, to accurately process, report, and handle date and time data
(including, without limitation, calculating, comparing, storing, sorting,
defining, managing and sequencing) from, into, and between the twentieth and
twenty-first centuries, and the years 1999 and 2000, including leap year
calculations.

4.   CONFIDENTIALITY.  Each party acknowledges that Company Information may be
     ---------------
disclosed to the other party during the course of this Agreement Each party
agrees that it shall take reasonable steps, which shall include, at a minimum,
the steps it takes to protect its own Company Information, to prevent the
duplication or disclosure of Company Information, other than by or to its
employees or agents who must have access to the Company Information to perform
such party's obligations hereunder, who shall each agree to comply with the
terms of this Section 4.  Each party agrees that if it is required by law to
disclose the other party's Company Information, such disclosing party must first
give written notice of such required disclosure to the other party and make a
reasonable effort to obtain a protective order requiring that the Company
Information so disclosed be used only for the purposes for which disclosure is
required.  Each party shall protect the other party's Company Information during
the Term and for three (3) years after the termination or expiration of this
Agreement.

5.   LIMITATION OF LIABILITY: DISCLAIMER: INDEMNIFICATION.

     5.1  Limitation of Liability. IN NO EVENT SHALL EITHER PARTY BE LIABLE TO
          -----------------------
THE OTHER PARTY FOR ANY LOSS OF PROFITS, LOSS OF BUSINESS, LOSS OF USE OR DATA,
INTERRUPTION OF BUSINESS, OR FOR INDIRECT, SPECIAL, INCIDENTAL, EXEMPLARY,
MULTIPLE PUNITIVE OR CONSEQUENTIAL DAMAGES OF ANY KIND, WHETHER BASED ON
CONTRACT, TORT (INCLUDING WITHOUT LIMITATION, NEGLIGENCE), WARRANTY, GUARANTEE
OR Amy OTHER LEGAL OR EQUITABLE GROUNDS, EVEN IF SUCH PARTY HAS BEEN ADVISED OF
THE POSSIBILITY OF SUCH DAMAGES. NEITHER PARTY SHALL MAKE REPRESENTATIONS OR
WARRANTIES TO ANY END USER OR THIRD PARTY ON BEHALF OF THE OTHER PARTY AND IN NO
EVENT WILL EITHER PARTY BE LIABLE TO THE OTHER PARTY FOR ANY REPRESENTATION OR
WARRANTY MADE TO ANY END USER OR THIRD PARTY BY THE OTHER PARTY. THESE
LIMITATIONS SHALL SURVIVE AND APPLY NOTWITHSTANDING THE VALIDITY OF THE LIMITED
REMEDIES PROVIDED FOR IN THE AGREEMENT. THE LIMITATIONS SET FORTH IN THIS
SECTION 5.1 SHALL NOT APPLY TO THE PARTIES' INDEMNIFICATION OBLIGATIONS SET
FORTH IN SECTION 5.3 BELOW OR TO THE PARTIES, INJUNCTIVE RELIEF REMEDIES SET
FORTH IN SECTION 5.4 BELOW.

     5.2  Disclaimer. EXCEPT AS EXPRESSLY SET FORTH IN THE AGREEMENT, NEITHER
          ----------
PARTY MAKES, AND EACH PARTY HEREBY SPECIFICALLY DISCLAIMS, ANY REPRESENTATIONS
OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THE EARTHLINK/SPRINT SERVICE THE
EARTHLINK/SPRINT SITE OR THE E-STAMP SOFTWARE,

                                      -10-
<PAGE>

THE E-STAMP INTERNET POSTAGE, THE CO-BRANDED SITE OR THE SERVICES OR OTHERWISE
RELATING TO THIS AGREEMENT, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE AND IMPLIED WARRANTIES ARISING FROM COURSE OF
DEALING OR COURSE OF PERFORMANCE.

     5.3  Indemnity.  Each party agrees to indemnify, and hold harmless the
          ---------
other party and its officers, directors, employees, agents, successors and
assigns from and against any and all losses, liabilities, damages, penalties and
claims  and all related costs and expenses (including reasonable attorneys'
fees) related to claims made by third parties against the indemnified party
alleging that the indemnifying party's Marks or other intellectual property
infringe the patents, copyrights, trademarks or service marks or other
intellectual property rights of such third parties.  E-Stamp agrees to further
indemnify and hold harmless EarthLink from and against all third party claims,
causes of action, liabilities and all other reasonable costs and expenses
relating to any transactions or the quality of products or services, appearing
on or provided through the Services or the Co-Branded Site.  EarthLink agrees to
further indemnify and hold harmless E-Stamp from and against all third party
claims, causes of action, liabilities and all reasonable attorneys' fees and
expenses relating to any branding from any EarthLink Premiere Partner provided
to E-Stamp pursuant to this Agreement.  Each party agrees to promptly notify the
indemnifying party in writing of any indemnifiable claim.  The indemnified party
shall cooperate in all reasonable respects with the indemnifying party and its
attorneys in the investigation, trial, defense and settlement of such claim and
any appeal arising therefrom.  The indemnified party may participate in such
investigation, trial, defense and settlement of such claim and any appeal
arising therefrom, through its attorneys or otherwise, at its own cost and
expense.  No settlement of a claim that involves a remedy other than the payment
of money by the indemnifying party shall be entered into without the consent of
the indemnified party, which consent will not be unreasonably withheld.

     5.4  Injunctive Relief, The parties hereby agree and acknowledge that
          -----------------
violation by one party of the provisions of Sections 2.(j) or 4 may cause
irreparable harm to the other party not adequately compensable by monetary
damages.  In addition to other relief, it is agreed that temporary and permanent
injunctive relief shall be available to the parties to prevent any actual or
threatened violation of such provisions as provided by law.

6.   TERM, RENEWAL AND TERMINATION.
     -----------------------------

     6.1  Term. The initial term of this Agreement shall be the time between the
          ----
Effective Date and the Launch Date plus one (1) year from the Launch Date (the
"Initial Term"). After the Initial Term, this Agreement shall automatically
terminate unless both parties, before the expiration of the Initial Term,
execute written consent to renewing the term for an additional one (1) year
("Renewal Term").

     6.2  Termination.  This Agreement may be terminated by the parties as
          -----------
follows:

          (a)  Either party may terminate this Agreement at any time in the
event of a material breach by the other party of this Agreement that remains
uncured thirty (30) days after the breaching party's receipt of written notice
of the breach;

          (b)  Either party may terminate this Agreement immediately if the
other party is unable to pay its debts as due, or enters into or files (or has
filed or commenced against it) a petition, arrangement, action or other
proceeding seeking relief or protection under the bankruptcy laws of the United
States or similar laws of the United States or any state of the United States;
and

          (c)  Either party may terminate this Agreement, at its option, upon
sixty (60) days written notice in the event that either party discontinues its
web site.  In the event of termination pursuant to this

                                      -11-
<PAGE>

section, the parties will have no further obligation to each other following the
effective date of the termination, and all fees payable in advance, if any,
shall be prorated as of the effective date of the termination, with appropriate
refunds made.

          (d)  Change in Control.  Either party may, at its option, terminate
               -----------------
this Agreement upon thirty (30) days' written notice to the other party in the
following situations (each, a "Change in Control"):

               (1)  a controlling interest in a party is acquired directly or
indirectly by a Competing Third Party that is not an Affiliate of such party
prior to the Effective Date;

               (2)  a party merges into, consolidates with, or otherwise is
acquired, directly or indirectly, by any Competing Third Party that is not its
Affiliate prior to the Effective Date; or

               (3)  a party is sold or substantially all of its assets are sold
directly or indirectly to a Competing Third Party.

          A party subject to a Change in Control will promptly, but in no event
later than sixty (60) days prior to the effective date of the Change in Control,
provide the other party in writing the details of such Change in Control.
Failure of the receiving party to terminate this Agreement within thirty (30)
days of receiving such notice shall constitute a waiver of that party's option
to terminate.  EarthLink and E-Stamp agree that, for the purposes of this
Agreement, to the extent that none of the situations described in Section
6.2(d)(1) through 6.2(d)(3) arise, a public offering of a party's common stock
(e.g., an Initial Public Offering) does not constitute a Change in Control.

          As used in this section, a "Competing Third Party" is an unaffiliated
party that the party not having a Change in Control considers, in it reasonable
judgment, to be a competitor.

          (e)  EarthLink may terminate this Agreement, without refund of any
kind to E-Stamp, immediately upon written notice to E-Stamp, in the event that
E-Stamp is unable to complete the launch the Services within ninety (90) days
following the Effective Date; provided such failure to launch is not caused by
EarthLink.

     6.3  Effects of Termination. Within three (3) business days after
          ----------------------
termination of this Agreement for any reason, each party shall: (i) purge all
Marks as used in connection with this Agreement from any and all computer
systems, files, or storage media within their possession or control; (ii) return
to the other party any and all documents or other media embodying any use of the
other party's Marks; (iii) certify to the other party in writing that it has
complied with the foregoing obligations.  Upon any termination or other
expiration of this Agreement, each of the respective licenses granted in
Sections 2.1(a) and 2.2(a) and all other rights of the parties under this
Agreement shall terminate, except that, notwithstanding any of the foregoing,
the rights of the parties to seek any and all remedies in accordance with the
provisions of this Agreement, and the rights and obligations under Sections
2.1(h), 2.(j), 2.1(k), 4, 5, 6.3, 6.4 and 7 herein shall continue in full force
and effect.  If E-Stamp terminates this Agreement for material breach by
EarthLink in accordance with 6.2(a) herein, all fees payable in advance, if any,
shall be prorated based on Guaranteed Customers as of the Effective Date of
termination, and appropriate refunds shall be made.

     6.4  No Damages or Indemnification for Termination. Neither party shall be
          ---------------------------------------------
liable to the other party for any costs or damages of any kind, including
incidental or consequential damages, or for indemnification, solely on account
of the lawful termination of this Agreement, even if informed of the possibility
of such damages.

                                      -12-
<PAGE>

7.   GENERAL PROVISIONS.
     ------------------

     7.1  Intellectual Property Ownership.
          -------------------------------

          (a)  EarthLink.  As between the parties and except with respect to any
               ---------
materials provided to EarthLink by E-Stamp, EarthLink retains all right, title
and interest in and to the EarthLink Site (including, without limitation, any
and all content, data, URLs, domain names, technology, software, code, user
interfaces, "look and feel," Marks, and other items posted thereon or used in
connection or associated therewith, but excluding any items supplied by E-Stamp)
and EarthLink's Marks, along with all intellectual property rights associated
with any of the foregoing.  All goodwill arising out of E-Stamp's use of any of
EarthLink's Marks will inure solely to the benefit of EarthLink.

          (b)  E-Stamp.  As between the parties and except with respect to any
               -------
materials provided to E-Stamp by EarthLink.  E-Stamp retains all right, title
and interest in and to the E-Stamp Software, the E-Stamp Internet Postage, the
E-Stamp Site, the Jump Page and the Co-Branded Site (including, without
limitation, any and all content, data, URLs, domain names, technology, software,
code, user interfaces, "look and feel," Marks, and other items posted thereon or
used in connection or associated therewith, but excluding any items supplied by
EarthLink) and E-Stamp's Marks, along with all intellectual property rights
associated with any of the foregoing.  All goodwill arising out of EarthLink's
use of any of E-Stamp's Marks will inure solely to the benefit of E-Stamp.

          (c)  Other Marks. E-Stamp will not register or attempt to register any
               -----------
of EarthLink's Marks or any Marks that EarthLink reasonably deems to be
confusingly similar to any of EarthLink's Marks.  EarthLink will not register or
attempt to register any of E-Stamp's Marks or any Marks that E-Stamp reasonably
deems to be confusingly similar to any of E-Stamp's Marks.

          (d)  Further Assurances.  Each party will take, at the other party's
               ------------------
expense, such action (including, without limitation, execution of affidavits or
other documents) as the other party may reasonably request to effect- perfect or
confirm such other party's ownership interests and other rights as set forth
above in this Section 7.1.

     7.2  Independent Contractors. The parties to this Agreement are independent
          -----------------------
parties and nothing herein shall be construed as creating an employment
relationship between the parties. Neither party is an agent, representative, or
partner of the other party and neither party shall have any right, power or
authority to enter into any agreement for or on behalf of, or incur any
obligation or liability, or to otherwise bind, the other party. The Agreement
shall not be interpreted or construed to create an association, agency, joint
venture or partnership between the parties or to impose any liability
attributable to such a relationship upon either party.

     7.3  Entire Agreement.  The Agreement, including any exhibits attached
          ----------------
hereto, constitutes the entire understanding and agreement with respect to its
subject matter, and supersedes any and all prior or contemporaneous
representations, understandings and agreements whether oral or written between
the parties relating to the subject matter of this Agreement, all of which are
merged in this Agreement.

     7.4  Severabilitv of Provisions. In the event that any provision of this
          --------------------------
Agreement is found to be invalid or unenforceable pursuant to judicial decree or
decision, the remainder of this Agreement shall remain valid and enforceable
according to its terms.

     7.5  Assignment. The Agreement and the rights and obligations hereunder may
          ----------
not, whether voluntarily or involuntarily, directly or indirectly, whether by a
Change of Control or otherwise, be assigned, sublicensed, sold or otherwise
transferred by E-Stamp, including, without limitation, to any successor-in-

                                      -13-
<PAGE>

interest to any of E-Stamp's assets, without the prior written consent of
EarthLink, which consent shall be given or not in EarthLink's sole discretion,
unless any successor entity or assignee (other than an entity which provides or
purports to provide any EarthLink Competitive Services) assumes and agrees in
writing to continue to perform all of the executory obligations of E-Stamp and
E-Stamp guarantees such continued performance of the Agreement in which case the
                                  -----------
consent shall not be unreasonably withheld or delayed. EarthLink and E-Stamp
agree that, for the purposes of this Agreement, to the extent that none of the
situations described in Section 6.2(d)(1) through 6-2(d)(3) arise, a public
offering of a party's common stock (e.g., an Initial Public Offering) does not
constitute an assignment of this Agreement for purposes of this Section 7.5. The
Agreement and the rights and obligations hereunder may not, whether voluntarily
or involuntarily, directly or indirectly, whether by a Change of Control or
otherwise, be assigned, sublicensed, sold or otherwise transferred, including,
without limitation, to any successor-in-interest to any of EarthLink's assets,
by EarthLink to any entity which provides or purports to provide any E-Stamp
Competitive Services without the prior written consent of E-Stamp, which consent
shall be given or not in E-Stamp's sole discretion. In the event of any
purported assignment or other transfer of this Agreement by EarthLink, as a
condition to such assignment or transfer any such successor entity or assignee
will assume and agree in writing to continue to perform all of the executory
obligations of EarthLink hereunder and EarthLink will guarantee such continued
performance of the Agreement. Any assignment in violation of the terms hereof
shall be void and of no force or effect.

     7.6  Governing Law; Jurisdiction; Attorneys' Fees. The Agreement shall be
          --------------------------------------------
governed by the laws of California without giving effect to applicable conflict
of laws provisions. All actions with respect of this Agreement shall be brought
in the federal and state courts having jurisdiction within Pasadena, California
and the parties expressly consent to the personal jurisdiction of such courts.
In the event any litigation or other proceeding is brought by either party in
connection with this Agreement, the prevailing party in such litigation or other
proceeding shall be entitled to recover from the other party all costs,
attorneys' fees and other expenses incurred by such prevailing party in such
litigation.

     7.7  Notices. Except as specifically provided in this Agreement, all
          -------
notices required hereunder shall be in writing and shall be given by personal
delivery, overnight courier service, or first class mail postage prepaid, to the
parties at their respective addresses set forth below in this Section 7.7, or at
such other address(es) as shall be specified in writing by such party to the
other party in accordance with the terms and conditions of this Section 7.7. All
notices shall be deemed effective upon personal delivery, or three (3) business
days following deposit with any overnight courier service or with the U.S.
Postal System, first class postage attached, in accordance with this Section
7.7. Notices shall be sent as follows:

          If to E-Stamp:           E-Stamp, Corp.
                                   2855 Campus Drive, Suite 100
                                   San Mateo, CA 94403
                                   Tel: (650) 554-8454
                                   Attn: ________________________

          with a copy to:          ______________________________
                                   ______________________________
                                   ______________________________
                                   ______________________________

          If to EarthLink:         EarthLink Network, Inc.
                                   3100 New York Drive
                                   Pasadena, CA 91107
                                   Attn: Director of Legal Affairs

                                      -14-
<PAGE>

          with copies to:          Howard Lefkowitz, V.P. Business Development
                                   Leland Thoburn, V.P. Business Affairs
                                   EarthLink Network, Inc.
                                   3100 New York Drive
                                   Pasadena CA 91107

     7.8  Non-Solicitation.  During the Term of this Agreement and for a period
          ----------------
of twelve (12) months following the termination or expiration of this Agreement,
neither party may directly or indirectly, solicit, divert or hire away, or
attempt to solicit, divert or hire away any person employed by the other party
with whom such party had regular contact with during the course of its
performance under this Agreement, unless such person's employment has been
terminated for at least six (6) months or unless the other party gives its prior
consent to such hiring, such consent not to be unreasonably withheld.
Notwithstanding the foregoing, nothing herein shall prevent either party from
considering for employment or hiring any individual, whether or not an employee
of the other party, who has responded to a general solicitation for employment
from either party in a newspaper announcement or other public solicitation.

     7.9  Waiver.  No waiver of any provision of this Agreement, or any rights
          ------
or obligations of either party under this Agreement, -shall be effective, except
pursuant to a written instrument signed by the party or parties waiving
compliance, and any such waiver shall be effective only in the specific instance
and for the specific purpose stated in such writing.

     7.10 Headings.  The section and paragraph headings used in this Agreement
          --------
are inserted for convenience only and shall not affect the meaning or
interpretation of this Agreement.

     7.11 Amendment.  The  terms and conditions of this Agreement may not be
          ---------
modified or amended other than by a writing signed by both parties.

     7.12 Non-exclusive Engagement.  Each party hereby acknowledges and agrees
          ------------------------
that, during the Term, each party has the right within its sole discretion, to
retain third parties which provide services and functions similar to the
services and functions being provided by the other party under this Agreement.
The parties further acknowledge and agree that EarthLink may provide, in its
sole discretion, promotions through third parties that are the same as or
similar to the EarthLink promotions provided herein.

     7.13 Sprint Intellectual Property Right.  EarthLink markets its Internet
          ----------------------------------
access services under the EarthLink/Sprint brand.  Therefore, both EarthLink and
Sprint Marks are likely to appear on any Web page that includes an
EarthLink/Sprint brand.  To the extent that such Sprint brands or Marks are
used.  E-Stamp acknowledges and agrees that Sprint is a third party beneficiary
hereunder and has the right to enforce any provision of this Agreement that
relates to any intellectual property or Marks of EarthLink or Sprint.  Both
parties acknowledge and agree that except as provided herein there are no other
third party beneficiaries to this Agreement.

     7.14 Force Majeure.  Either party shall be excused from any delay or
          -------------
failure in performance hem-under caused by reason of any occurrence or
contingency beyond its reasonable control, including but not limited to, acts of
God, earthquake, labor disputes and strikes, riots, war, and governmental
requirements.  Notwithstanding the foregoing, a change in economic conditions or
technology shall not be deemed a Force Majeure event.  The obligations and
rights of the party so excused shall be extended on a day-to-day basis for the
period of time equal to that of the underlying cause of the delay.  In the event
of a force majeure event materially affecting the parties' performance under
this Agreement that lasts for more than thirty (30) days, either party may
terminate this Agreement.

                                      -15-
<PAGE>

     7.15 Export Laws.  EarthLink acknowledges and understands that certain
          -----------
portions of the E-Stamp Software and the E-Stamp Internet Postage may contain
cryptographic technology subject to export control laws under the U.S. Export
Administration Act and regulations and other applicable laws and regulations.
Accordingly in the event that EarthLink includes the E-Stamp Software in the
Setup Software, EarthLink and its Affiliates will not knowingly, without the
prior written approval of the U.S. Department of Commerce or any successor as
required, disclose, export, reexport the E-Stamp Software or the E-Stamp
Internet Postage or any portion thereof or any data related thereto to any
restricted country set forth in the U.S. Export Administration Act without the
requisite licenses or consent of the U.S. Bureau of Export Administration and/or
any governmental entity as may have jurisdiction over such disclosure, export or
reexport.

     7.16 Execution in Counterparts and by Facsimile.  The Agreement may be
          ------------------------------------------
executed in counterparts, each of which shall be deemed an original, but all of
which taken together shall constitute but one and the same instrument.  The
Agreement may be executed and delivered by facsimile and the parties agree that
such facsimile execution and delivery shall have the same force and effect as
delivery of an original document with original signatures, and that each party
may use such facsimile signatures as evidence of the execution and delivery of
this Agreement by all parties to the same extent that an original signature
could be used.

     IN WITNESS WHEREOF, the parties have duly executed and delivered this
Agreement as of the Effective Date set forth above.


EARTHLINK NETWORK, INC.                      E-Stamp Corporation



By:/s/ Howard Lefkowitz                      By:/s/ Robert H. Ewald
   ------------------------------               ------------------------------
   Howard Lefkowitz                             Robert H. Ewald
   V.P. Business Development                    President & CEO
   EarthLink Network, Inc.                      E-Stamp Corp.
   3100 New York Drive                          2855 Campus Drive, Suite 100
   Pasadena, CA 91107                           San Mateo, CA 94403
   Phone:  (626) 296-5011                       Phone: (650) 554-8454
   Fax:  (626) 296-8983                         Fax:  (650) 554-8455


EARTHLINK OPERATIONS, INC.


By:/s/ Howard Lefkowitz
   ------------------------------
   Howard Lefkowitz
   V.P. Business Development
   EarthLink Network, Inc.
   3100 New York Drive
   Pasadena, CA 91107
   Phone:  (626) 296-5011
   Fax:  (626) 296-8983

                                      -16-
<PAGE>

                                   EXHIBIT A

                                EarthLink Marks


- --------------------------------------------------------------------------------

     NOTE: THIS EXHIBIT A MAY BE AMENDED FROM TIME TO TIME AS REQUIRED
     BY EARTHLINK AND ALL SUCH AMENDMENTS SHALL BE INCORPORATED HEREIN.

     Trademarks, trade names, logos and other product and proprietary
     ----------------------------------------------------------------
     identifiers
     -----------

          EarthLink Network(R)
          EarthLink Network TotalAccess(TM)

          EarthLink Network(R) is a registered trademark of EarthLink Network,
          Inc.

          EarthLink Network TotalAccess(TM) is a trademark of EarthLink Network,
          Inc.

          EarthLink Sprint(SM) and the EarthLink Sprint logo are registered
          trademarks of EarthLink Network, Inc. and Sprint Corporation

- --------------------------------------------------------------------------------
<PAGE>

                                   EXHIBIT B

                                 E-Stamp Marks


- --------------------------------------------------------------------------------

     NOTE: THIS EXHIBIT B MAY BE AMENDED FROM TIME TO TIME AS REQUIRED BY
     E-STAMP AND ALL SUCH AMENDMENTS SHALL BE INCORPORATED HEREIN.

 The E-Stamp trademarks include without limitation the following:

          E-Stamp(R)

          E AND DESIGN(TM)

          E-Stamp Internet Postage(TM)

          e-stamp.com(TM)

          The Internet Postage Company(TM)

- --------------------------------------------------------------------------------
<PAGE>

                                   EXHIBIT C

                      EarthLink's Promotional Obligations

1.   Promotions

     EarthLink shall place and maintain the following items on the EarthLink
Site, in EarthLink's sole discretion:

     A.   EarthLink Personal Start Page.  EarthLink shall include the Services
provided by E-Stamp on the EarthLink Personal Start Page as follows:

          1. a Promotional Placement in the default postage purchasing services
position of the My Post Office Section;

          2. a Promotional Placement in the EarthLink Personal Start Page
Message of the Day rotation which is a daily changing text message that appears
above the fold on the EarthLink Personal Start Page that highlights and provides
links to interesting and useful products and services for EarthLink Members;

          3. on the EarthLink Personal Start Page of each EarthLink Member,
automatic selection of E-Stamp as the default provider of postage, which
automatic selection cannot be changed except as provided in the Agreement and by
any EarthLink Member; and

          4.   inclusion of other E-Stamp related content as agreed between the
parties in writing.

     B.   EarthLink Site.  EarthLink shall include the Services provided by
E-Stamp on the EarthLink Home Page and other areas of the EarthLink Site as
follows.

          1. a E-Stamp Promotional Placement included in the Business Resource
Center section rotation: and

          2. a rotation of a E-Stamp Promotional Placement in the Premiere
Partner section of the EarthLink Home Page.

     C.   Banner Advertisements.  Banner Advertisements on such locations of the
EarthLink Site as determined by EarthLink in its sole discretion. EarthLink
shall deliver at least [***] run of service Banner Advertisements per month, for
a total of [***] run of service Banners Advertisements during the Initial Term
or during each Renewal Term, as applicable.

     D.   The Mall.  EarthLink shall provide E-Stamp with a location in the Mall
to be designated the EarthLink Postal Center, or such other similar designation
as may be chosen by EarthLink in its sole discretion; provided, however, that
E-Stamp must first enter into with EarthLink, and agree to, EarthLink's Mall
Lease Agreement. The location within the Mall will be selected by EarthLink at
EarthLink's sole discretion.

     E.   Other Promotional Placements.  In addition to the Promotional
Placements described in paragraphs A through D above, such other Promotional
Placements on the EarthLink Site as may be agreed upon by the parties from time
to time.

*** Confidential treatment has been requested for the bracketed portions. The
    confidential redacted portion has been omitted and filed separately with the
    Securities and Exchange Commission.
<PAGE>

2.   bLink

     EarthLink shall place throughout the Term a total of one (1) advertisement,
subject to EarthLink's sole editorial discretion, to be developed by E-Stamp, in
consultation with EarthLink, in mutually agreed locations in each issue of
EarthLink's "bLink" hard-copy periodical published during the Term.  E-Stamp
agrees that any E-Stamp advertisement that appears in bLink must be specifically
targeted at EarthLink Members and must promote the availability of the Services
on the EarthLink Personal Start Page or the Mall.

3.   eLink

     Subject to EarthLink's discretion, E-Stamp will be profiled as a new
EarthLink Personal Start Page service, as well as being given text "advertising"
space for any special "for EarthLink Members only" promotions that EarthLink and
E-Stamp might jointly create to promote the Services.

4.   Setup Software (EarthLink Total Access CD-ROMs)

     EarthLink may at its own expense incorporate the E-Stamp Software into the
Setup Software.  E-Stamp hereby grants EarthLink a non-exclusive, royalty-free,
non-transferable license during the Term to reproduce and distribute to end-
users the E-Stamp Software solely in combination with the Setup Software and
solely in connection with the promotional activities conducted by EarthLink
pursuant to this Agreement.  EarthLink will reproduce on each copy of the Setup
Software containing any E-Stamp Software and not otherwise obscure or delete any
copyright notices and other proprietary legends of E-Stamp that are included on
the E-Stamp Software.  EarthLink will not modify, revise, alter or create any
derivative works based upon any of the E-Stamp Software without E-Stamp's prior
written consent.  EarthLink will not directly or indirectly reverse engineer,
disassemble or decompile the E-Stamp Software or any portion thereof or attempt
to discover or disclose the source code of any of the E-Stamp Software.
EarthLink will not sublicense, sell, lend, rent, lease, or otherwise transfer
all or any portion of the E-Stamp Software to any third party, or authorize any
person to do any of the foregoing, except as specifically provided for in this
Agreement.

                                      -2-
<PAGE>

                                   EXHIBIT D

                            Service Specifications

1.   Service Interruptions.  For the purposes of this Agreement, the following
     ---------------------
issues are defines as "Service Interruptions":

     a)   "Complete Outage" means the Co-Branded Site is not reachable by
EarthLink Members for sixty (60) minutes or more, due to E-Stamp systems or
services within E-Stamp's control; provided however, that E-Stamp may perform
major system upgrades and/or service maintenance on a scheduled and pre-
announced basis which may put the Co-Branded Site down for up to eight (8)
hours.

     b)   "URL Errors" means any errors in URLs, missing pages or typos in URLs
caused by E-Stamp error, including any E-Stamp error that causes EarthLink to
present an incorrect URL on the EarthLink Site, or which causes EarthLink to
attempt to harvest information from an incorrect URL.

2.   Response Team.  E-Stamp will at all times during the Term and at E-Stamp's
     -------------
sole cost and expense, maintain a 24 hour a day, 7 day a week a contact person
responsible for monitoring the Co-Branded Site.  The contact person will be
available to EarthLink on a 24 hour a day, 7 day a week basis by phone and
e-mail for consultation on Service Interruption issues and to assist in the
restoration of service following a Service Interruption. E-Stamp will provide
EarthLink with the names and phone numbers and e-mail addresses of its contact
person, and ensure that any changes to the contact information is provided to
EarthLink.

3.   Escalation Procedures.
     ---------------------

     a)   In the event of a Complete Outage, the E-Stamp contact person will
contact EarthLink as soon as possible following E-Stamp's identification of a
Service Interruption and will notify EarthLink of the nature of the Service
Interruption and the estimated time of resumption of service.  E-Stamp's contact
person will keep EarthLink notified of progress in resolving the Service
Interruption.  If the Service Interruption is estimated to last longer than
sixty (60) minutes, EarthLink will have the option, at EarthLink's sole
discretion, of:

          (i)  removing any links or references to the Co-Branded Site from the
EarthLink Site until such time as the Service Interruption is cured in
EarthLink's reasonable discretion; or

          (ii) to redirect any links to any web address or Services experiencing
a Service Interruption, to an explanatory page of EarthLink's choosing.
EarthLink may publish such explanatory page, and may choose in its sole
discretion the wording of any explanatory messages on such page.

     Following the first six (6) months after the Launch Date, in the event
E-Stamp experiences more than twelve (12) Complete Outages in any two (2) month
period, in addition to any and all other remedies available to EarthLink
hereunder, EarthLink may terminate the Agreement immediately upon written notice
to E-Stamp.

     b)   URL Errors.  EarthLink will contact E-Stamp with regards to any URL
Error, and E-Stamp will work in a commercially reasonable manner to repair such
Service Interruption.  EarthLink may remove any links or references on the
EarthLink Site to the Co-Branded Site until such time as the Service
Interruption is repaired to EarthLink's satisfaction.  If the URL Error is not
corrected within five (5) business days of first notification, in addition to
any and all other remedies available to EarthLink hereunder, EarthLink may
terminate the Agreement immediately upon written notice to E-Stamp.

4.   E-Stamp Notice.  E-Stamp will give the EarthLink no less than fifteen (15)
     --------------
days prior notice of any changes to its URLs, harvest specifications, Or any of
its processes and procedures that will affect the manner in which EarthLink
harvests information off of the Co-Branded Site.
<PAGE>

                                   EXHIBIT E

                        EarthLink Competitive Services

     NOTE:  THIS EXHIBIT E MAY BE AMENDED FROM TIME TO TIME AS REQUIRED BY
EARTHLINK AND ALL SUCH AMENDMENTS SHALL BE INCORPORATED HEREIN.

     ISPs
     ----
     ATT
     Erols
     Netcom
     Mindspring
     AOL
     Concentric
     MSN
     Prodigy
     Compuserve/Spry
     At Home
     Pac Bell, Bell Atlantic, Southwestern Bell, or any Baby Bell ISP Service

     TELCOS
     ------
     ATT
     MCI
     WorldCom
     IDT
     LCI
     GTE
     Pac Bell, Bell Atlantic, Southwestern Bell, or any Baby Bell

     Web Hosting
     -----------
     Geocities
     Tripod
     The Globe
     WebRing
     AngelFire

     Free Email Services
     -------------------
     Bonus Mail
     Hotmail
     Juno
     Yahoo
     Excite
     FreeMail
     AltaVista eMail
     AmExMail
     CMPnet Mail
     Discoverymail
     FortuneCity.com Mail
     The Globe
     LookSmart
     LycosEmail

<PAGE>

     Personal Start Pages
     --------------------
     Lycos
     Yahoo
     Excite
     Netscape
     Microsoft
     Planet Direct
     Snap! Online
     Internet Direct

     Domain Name Registration
     ------------------------
     Network Solutions
     Internic
     CA Domain
     EU.org
     Monolith Coalition
     Public DNS
     Register.Com

     Other
     -----
     PointCast
     Microsoft



                                        -2-
<PAGE>

                                   EXHIBIT F

     Pitney Bowes has asserted that open metering systems conforming to the
United States Post Office IBIP Performance Criteria infringe various Pitney
Bowes patents and Civil Action No. 99363 asserts claims of infringement of six
Pitney Bowes patents by E-Stamp.

<PAGE>

                                                                   Exhibit 10.21


                               SERVICES AGREEMENT

This Services Agreement ("Agreement") is entered into as of  September 24, 1999
("Effective Date"), by and between Intuit Inc. a Delaware corporation, located
at 2550 Garcia Ave., Mountain View, California 94043 ("Intuit"), and E-Stamp
Corporation, a Delaware corporation, located at 2855 Campus Drive, Suite 100,
San Mateo, California 94403 ("E-Stamp").

The parties agree as follows:

1.   DEFINITIONS

     1.1  "Customer" means a customer who:  (a) has signed up with the E-Stamp
Service using the QuickBooks Product or through specified Intuit Sites or by way
of Intuit advertising; provided that, with respect to such Intuit advertising,
only if the parties mutually agree upon appropriate means of tracking or
confirming that such customer is an Intuit referral; and (b) is approved to use
the E-Stamp Service and has purchased U.S. Electronic Postage at least once by
accessing the E-Stamp Service.

     1.2   "E-Stamp Competitor" means a legal entity, or a division of a legal
entity, primarily engaged in the business of selling U.S. Electronic Postage or
U.S. Electronic Postage software.   As of the Effective Date, to the best of the
parties' knowledge the E-Stamp Competitors are Stamps.com, Pitney Bowes and
Neopost.

     1.3  "E-Stamp Postage Buying Experience" means the process by which a
Customer accesses the E-Stamp Service via the QuickBooks Product or via a
specified Intuit Site and purchases U.S. Electronic Postage through the E-Stamp
Service.

     1.4  "E-Stamp Service" means the E-Stamp service(s) of distributing postage
electronically in accordance with IBIP under this Agreement, which will include
the related functionality generally made available by E-Stamp at
http://www.estamp.com.

     1.5  "E-Stamp Sign Up Experience" means the process by which a Customer
accesses the E-Stamp Service via the QuickBooks Product or via a specified
Intuit Site and registers with E-Stamp to use the E-Stamp Service.

     1.6  "E-Stamp Site" means the site designed and hosted by E-Stamp for the
purposes of this Agreement, to be located at http://www.estamp.com/intuit or
                                             ----------------------------
other such location as E-Stamp may designate.

     1.7  "Exclusivity Criteria" means the following criteria:
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

          (a)  the pricing of the E-Stamp Service under this Agreement is
               competitive with the pricing of the E-Stamp Service generally;

          (b)  E-Stamp is among the top 2 U.S. Electronic Postage merchants
               as determined, to the extent possible over a reasonable amount of
               time, by independent third parties and in light of the number and
               average yearly postage purchases of customers through E-Stamp,
               customer service and satisfaction, site performance, and product
               offerings; and

          (c)  E-Stamp has not failed to cure any material breach of this
               Agreement by E-Stamp within fifteen (15) days after its receipt
               of Intuit's written notice of such breach.

     1.8  "Gross Revenues" means transaction revenues earned by E-Stamp through
the sale to Customers of U.S. Electronic Postage through the E-Stamp Service,
under the terms of this Agreement, provided that Gross Revenues shall not
include the value of the postage sold.

     1.9  "IBIP" means the United States Postal Service's Information-Based
Indicia Program.

     1.10  "Intuit's Supplies Business" means Intuit's Financial Supplies Group
(FSG) or its successor group.

     1.11  "Intuit Sites" means http://www.quickbooks.com or such other Intuit
web sites as may be designated by Intuit in writing.

     1.12  "Net Revenues" means Gross Revenues, less E-Stamp transaction  costs
not to exceed 10% of Gross Revenues, provided that such transaction costs
will not include costs of E-Stamp Starter Kits (as defined in Section 7.5(a)).

     1.13  "QuickBooks Product" means the U.S. version of Intuit's QuickBooks
[***] or QuickBooks [***] software product.

     1.14  "QuickBooks [***] Launch" means the date on which Intuit's QuickBooks
[***] product, with access to the E-Stamp Service, E-Stamp Sign Up Experience
and E-Stamp Postage Buying Experience as specified in Schedule A, is first made
                                                      ----------
commercially available to the public.

     1.15  "U.S. Electronic Postage" means a type of U.S. postage approved by
the U.S. Postal Service for sale and distribution over the Internet, and which
meets the specifications defined by IBIP.

     1.16  "Territory" means the United States.


*** Confidential treatment has been requested for the bracketed portions.  The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.


                                       2
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

     1.17  "QuickBooks Customer" means a QuickBooks Product customer who:  (a)
has signed up with the E-Stamp Service using the QuickBooks Product or through
specified Intuit Sites; and (b) can be confirmed and validated as the licensee
of a QuickBooks Product in a mutually agreed upon manner.

2.   PRODUCT INTEGRATION, MARKETING, AND PROMOTIONAL ACTIVITIES

     2.1  The parties will use commercially reasonable efforts to provide the
marketing and promotional activities in accordance with the obligations
described in Schedule A ("Program Description").  Without limiting the
             ----------   -------------------
generality of the foregoing, the parties will cooperate and work together to
define and implement all programs necessary to achieve the overall objectives of
the parties under this Agreement to the extent that the parties mutually agree
in writing on such definition and implementations during the term of this
Agreement.  The parties will provide product integration as described in
Schedule A.  The parties recognize that the dates specified in Schedule A for
- ----------                                                     ----------
each party's activities can be met by such party only if the other party
performs its related obligations described in Schedule A within a reasonable
                                              ----------
timeframe prior to the time such activity is to be implemented.

     2.2  E-Stamp shall have the opportunity to review and provide input prior
to finalization of the details of implementation of the Program Description,
provided that the details of implementation of the Program Description shall be
subject to Intuit's reasonable discretion.

     2.3  In no event shall any part of the E-Stamp Sign-up Experience or the E-
Stamp Postage Buying Experience provided by E-Stamp to Customers who accessed
the E-Stamp Sign-Up Experience or E-Stamp's software through a link in the
QuickBooks Product or through a specified Intuit Site contain any graphic or
textual hyperlinks, promotions, logos or advertising banners of any principal
competitor of Intuit specified in Schedule B as amended in accordance with the
                                  -----------
provisions of Schedule B; provided, however, that the terms of this paragraph
             -----------
will not apply to references to the E-Stamp Service's integration with Microsoft
Word, Microsoft Outlook, or Microsoft Internet Explorer.

     2.4  In the event that any part of the E-Stamp Sign-up Experience or the E-
Stamp Postage Buying Experience provided by E-Stamp to Customers who accessed E-
Stamp Sign-Up Experience of E-Stamp's software through a link in the QuickBooks
Product or through a specified Intuit Site contains any content or other items
that violate the restrictions set forth in Section 2.3 or that are obscene,
indecent, in poor taste, defamatory, criminal, or otherwise violate any
applicable law, subject to applicable regulations of the U.S. Postal Service E-
Stamp shall promptly remove such content as soon as possible following Intuit's
authorized request.

     2.5  E-Stamp will be responsible for the security of the E-Stamp Service
and for all U.S. Electronic Postage purchased by Customers through the E-Stamp
Service.

3.   SUPPLIES

                                       3
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

     During the six (6) months following the Effective Date, the parties shall
cooperate in negotiating to build a mutually-beneficial supplies business and to
implement a revenue sharing model for such supplies business; provided that such
business is incremental and supplemental to Intuit's Supplies Business current
customer base and product line and does not detract from Intuit's Supplies
Business' then-current sales and revenues.

4.   CUSTOMERS

     4.1  Customer Service.  E-Stamp shall cooperate and assist Intuit by
          ----------------
answering  Customer questions and complaints regarding the E-Stamp Services
provided and E-Stamp shall be solely responsible for providing all customer
service and support with respect to such services.  Such service and support
will meet the response requirements specified in Schedule C in all material
                                                 ----------
respects.  E-Stamp shall provide Intuit with a priority, toll-free phone number
and a website url where Intuit can direct Customers who need such service and
support.

     4.2  Site Performance.  During the term of this Agreement, the performance
          ----------------
of the E-Stamp Site will meet the requirements specified in Schedule D in all
                                                            ----------
material respects.

     4.3  Customer Information.  During the E-Stamp Sign Up Experience and the
          --------------------
E-Stamp Postage Buying Experience, the information that E-Stamp obtains from
Customers will be limited to information reasonably related to the purchase of
U.S. Electronic Postage pursuant to this Agreement or otherwise required to
provide the E-Stamp Service or comply with applicable laws and regulations
(including, without limitation, IBIP requirements).

5.   REPORTING

     E-Stamp will provide Intuit with the following kinds of reports on a
monthly basis during the term of this Agreement, subject to E-Stamp's
commercially reasonable privacy policies (which shall be no more restrictive
than TRUSTe's requirements) and applicable laws and government rules and
regulations (including, but not limited to, applicable rules and regulations
issued by the U.S. Postal Service):

     (a)  aggregated Customer profile information, including but not limited to
          business location, and industry;

     (b)  usage data that shows acquisition rates, conversion rates, postage
          products used, purchase frequency, average order size, and paths
          through the process;

     (c)  Customer service data that shows contact rates, response times,
          delivery times, major customer service issues based on the reasons for
          customer service contacts;

     (d)  data to support quarterly revenue share and bounty fees;

                                      4
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------


     (e)  aggregated Customer transaction information showing average
          transaction, monthly and yearly purchases;

     (f)  twelve (12) month rolling non-binding forecast of estimated users,
          gross revenues, net revenues, and payments to Intuit, which forecast
          will be jointly formulated by the parties; and

     (g)  Customer-specific information.

6.   EXCLUSIVITY

     6.1  Provided that E-Stamp meets the Exclusivity Criteria:  (a) E-Stamp
will be the only U.S. Electronic Postage provider for Intuit's QuickBooks
Products Business; and (b) Intuit will not engage in any marketing, promotion or
distribution of U.S Electronic Postage via the QuickBooks Product Business with
an E-Stamp Competitor during the term of this Agreement; and (c) Intuit will
make no further promotional, advertising or sponsorship opportunities on
QuickBooks.com or QuickBooks.com newsletters available to an E-Stamp Competitor.

     6.2  "QuickBooks Product Business" means the business of marketing,
promoting and selling the QuickBooks Products and directly related products and
shall not include:  (i) advertising on Quicken.com; (ii) advertising on
QuickBooks.com; (iii) advertising sold by third parties on framed third party
sites; (iv) advertising in Intuit's small business newsletters; or (v)
advertising on the Web sites at http://www.quicken.excite.com,
http://www.quicken.webcrawler.com, or http://www.quicken.aol.com

     6.3  Intuit also agrees, provided that E-Stamp meets the Exclusivity
Criteria, to provide E-Stamp a Right of First Consideration for:

          (a) future in-product integration of U.S. Electronic Postage services
              into the Intuit Quicken and/or Quicken Home and Business software
              products;

          (b) joint marketing, distribution and promotion of U.S. Electronic
              Postage services associated with the Quicken and Quicken Home &
              Business software products and customer bases, subject to
              Intuit's existing obligations with third parties;

          (c) future integration of U.S. Electronic Postage services into
              Intuit's Supplies Business to supplement the product lines of
              Intuit's Supplies Business; and

          (d) becoming the exclusive online postage partner for Quicken.com
              and Quicken.com newsletters subject to Intuit's existing
              obligations with third parties.

                                       5
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

"Right of First Consideration" shall mean that Intuit shall consider E-Stamp
first for an opportunity under Section 6.3 and give E-Stamp advance written
notice thereof; provided, however, that Intuit shall in no way be obligated to
provide E-Stamp with Intuit's decision regarding such opportunity before
soliciting or considering any third parties for such opportunity.  In no way
shall this section preclude Intuit from soliciting, considering, and/or
selecting an E-Stamp Competitor for such opportunity.  Intuit shall have sole
discretion in defining the terms of opportunities under this Section 6.3.  To
the extent that Intuit and E-Stamp agree in writing upon the terms and
conditions of such an opportunity, such terms and conditions will automatically
be added to the provisions of Section 6.1.

     6.4  In the event that E-Stamp fails to meet the Exclusivity Criteria,
Intuit shall have the right at any time, upon written notice to E-Stamp, to
terminate the provisions of this Section 6; and/or (ii) limit the applicability
of this Agreement solely to the QuickBooks [***] product.

7.   FEES AND COSTS

     7.1  Customer Acquisition Fee.  Subject to Section 7.2, E-Stamp will pay
          ------------------------
Intuit an initial fee of $5,500,000, in such amounts and on such dates as
follows:

          (a)  $1,000,000 due and payable upon execution of this Agreement; and

          (b)  $4,500,000 due and payable on the date of the QuickBooks [***]
               Launch or on January 1, 2000, whichever is later.

     7.2  Survival of Payment Obligations.  The payment obligations specified
          -------------------------------
in Section 7.1 shall survive any termination of this Agreement, except with
respect to payment obligations which are due and payable after:  (i) E-Stamp has
given Intuit notice of termination of this Agreement in accordance with Section
9.2 (Termination for Breach) due to Intuit's material breach of this Agreement,
if termination of this Agreement  subsequently occurs in accordance with Section
9.2 based on such notice; (ii) E-Stamp has given Intuit notice of termination of
this Agreement in accordance with Section 15.5 (Force Majeure); or (iii) E-Stamp
has given Intuit notice of termination of this Agreement in accordance with
Section 15.1 (Assignment).

     7.3  Customer Bounty Fee.  In addition, E-Stamp will pay Intuit, within
          -------------------
thirty (30) days after the end of each calendar quarter during the term of this
Agreement, a quarterly fee for each New Customer acquired during such calendar
quarter in excess of the number indicated in the second column for the
applicable calendar year, in the amounts as follows:

<TABLE>
<CAPTION>
Calendar Year                 For each New Customer over the following number           Bounty Fee
                                       of New Customers in such year
- -----------------------------------------------------------------------------------------------------------
<S>                           <C>                                                       <C>
1999                          10,000                                                    $52/New Customer
- -----------------------------------------------------------------------------------------------------------
2000                          30,000                                                    $77/New Customer
- -----------------------------------------------------------------------------------------------------------
2001                               0                                                    $27/New Customer
- -----------------------------------------------------------------------------------------------------------
</TABLE>


*** Confidential treatment has been requested for the bracketed portions.  The
confidential redacted portion has been omitted and filed separately with the
Securities and Exchange Commission.


                                       6
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

For clarification, such fees shall be due and payable:  (a) for each New
Customer in excess of 10,000 New Customers in 1999; (b) for each New Customer in
excess of 30,000 New Customers in 2000; and (c) for each New Customer in 2001.
For purposes of the foregoing, a "New Customer" means, for any quarter or year,
a Customer who first qualifies as a "Customer" under Section 1.1 during such
quarter or year, as the case may be.

     7.4  Revenue Sharing Fees.  In addition, E-Stamp will pay Intuit, within
          --------------------
thirty (30) days after the end of each calendar quarter during the term of this
Agreement, quarterly fees based on a percentage of the Net Revenues earned by E-
Stamp during such quarter as follows:

     Calendar Year     Payment to Intuit
     -------------     -----------------
     1999              0% of Net Revenues
     2000             20% of Net Revenues
     2001             20% of Net Revenues

     7.5  Costs.
          -----

          (a) Starter Kit Costs.  E-Stamp agrees that, during the term of this
              -----------------
Agreement, QuickBooks Customers who request the then-current E-Stamp Starter
Kit in order to access and purchase U.S. Electronic Postage on the E-Stamp
Service, which kit E-Stamp will provide to such customers following such
requests, will not be obligated to pay charges of any kind for such kits.
Intuit will contribute toward E-Stamp's costs of such kit for each such
QuickBooks Customer to whom E-Stamp supplies an E-Stamp Starter Kit in
accordance with this paragraph as follows: Intuit will be obligated to E-Stamp
in the amount of Two Dollars ($2.00) for each such QuickBooks Customer,
payable within thirty (30) days after receipt of a quarterly report with
respect to the calculation of the amounts due. "E-Stamp Starter Kit" means the
E-Stamp electronic vault, E-Stamp Internet postage software, E-Stamp address
matching CD, and associated documentation.

          (b) Other Costs.  Unless otherwise provided in this Agreement, each
              -----------
party shall bear its own costs and expenses in connection with its activities
performed under this Agreement.

     7.6  Records/Audit.  E-Stamp will maintain accurate records, and will
          -------------
provide Intuit with timely reports based upon such records, with respect to the
calculation of all amounts due under this Agreement.  Intuit may, upon no less
than thirty (30) days prior written notice to E-Stamp, but no more frequently
than once each calendar quarter, cause an independent Certified Public
Accountant to inspect all relevant records of E-Stamp upon which the calculation
of such payments are based during E-Stamp's normal business hours.  The fees
charged by such Certified Public Accountant in connection with the inspection
will be paid by Intuit unless the payments made to Intuit are determined to have
been less than ninety-five percent (95%) of the payments actually owed to
Intuit, in which case E-Stamp will be responsible for the payment of the
reasonable fees for such inspection. In addition, E-Stamp shall immediately
remit payment to

                                       7
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------


Intuit for the full amount of any disclosed shortfalls.  The
audit rights set forth herein shall continue for one (1) year following the
termination of this Agreement for any reason.

8.   PUBLICITY

     Unless required by law, neither party will make any public statement, press
release or other announcement relating to the terms of or existence of this
Agreement without the prior written approval of the other.

9.   TERM AND TERMINATION

     9.1  Term.  Unless otherwise terminated as specified in this Section 12,
          ----
the term of this Agreement shall begin on the Effective Date and will end on
December 31, 2001.  Renewal of this Agreement will require the mutual written
agreement of the parties.

     9.2  Termination for Breach.  Either party may terminate this Agreement if
          ----------------------
the other party materially breaches a material obligation hereunder and such
breach remains uncured for thirty (30) days following the notice to the
breaching party of the breach and the notifying party's intention to terminate.
All undisputed payments that have accrued prior to the termination or expiration
of this Agreement for any reason will be payable in full within thirty (30) days
thereof.

     9.3  Post-Termination Transition Period.  During the 90-day period
          ----------------------------------
immediately following the effective date of any termination of this Agreement,
the parties will cooperate in good faith (including, to the extent required by
such good faith cooperation, by continuing the performance of their obligations
and the exercise of their rights) under this Agreement in order to minimize any
disruption to Customers resulting from the termination of this Agreement.

     9.4  Survival.  The provisions of Sections 7.1 (Customer Acquisition Fee),
          --------
except to the extent specified in Section 7.2; Section 7.6 (Records/Audit); 8
(Publicity); 9.0 (Termination); 11 (Content Ownership); 12 (Confidentiality and
User Data); 13 (Warranty/Indemnity/Disclaimer); 14 (Limitation of Liability);
and 15 (General) will survive any termination or expiration of this Agreement.

10.  TRADEMARK OWNERSHIP AND LICENSE

     10.1  Ownership.  E-Stamp will retain all right, title and interest in and
           ---------
to its trademarks, service marks and trade names worldwide, subject to the
limited license granted to Intuit hereunder.  Intuit will retain all right,
title and interest in and to its trademarks, service marks and trade names
worldwide, subject to the limited license granted to E-Stamp hereunder.

     10.2  License.  Each party hereby grants to the other a non-exclusive,
           -------
limited license to use its trademarks, service marks or trade names only as
specifically described in this Agreement.  All such use shall be in accordance
with each party's reasonable policies regarding advertising and trademark usage
as shall be established or changed from time to time in each party's sole

                                       8
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------


discretion, and shall be subject to the approval of the party whose trademarks,
service marks or trade names are being used.  Upon the expiration or termination
of this Agreement, each party will cease using the trademarks, service marks
and/or trade names of the other except as the parties may agree in writing or to
the extent permitted by applicable law.

11.  CONTENT OWNERSHIP

     E-Stamp will retain all right, title and interest in and to the E-Stamp
Site worldwide including, but not limited to, ownership of all copyrights, look
and feel and other intellectual property rights therein.  Intuit will retain all
right, title, and interest in and to the Intuit Sites worldwide including, but
not limited to, ownership of all copyrights, look and feel and other
intellectual property rights therein.

12.  CONFIDENTIALITY AND USER DATA

     12.1  Definition. For the purposes of this Agreement, "Confidential
           ----------
Information" means this Agreement, and all information about the disclosing
party's (or its suppliers') business or activities that is proprietary and
confidential, which shall include all business, financial, technical and other
information of a party marked or designated by such party as "confidential or
"proprietary" at the time of disclosure.

     12.2  Exclusions. Confidential Information will not include information
           ----------
that (i) is in or enters the public domain without breach of this Agreement,
(ii) the receiving party lawfully receives from a third party without
restriction on disclosure and without breach of a nondisclosure obligation,
(iii) the receiving party rightfully knew prior to receiving such information
from the disclosing party or (iv) the receiving party develops independent of
any information originating from the disclosing party.

     12.3  Restrictions. Each party agrees (i) that it will not disclose to any
           ------------
third party or use any Confidential Information disclosed to it by the other
except as expressly permitted in this Agreement and (ii) that it will take all
reasonable measures to maintain the confidentiality of all Confidential
Information of the other party in its possession or control, which will in no
event be less than the measures it uses to maintain the confidentiality of its
own information of similar importance.

                                       9
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

     12.4  Limitations. Notwithstanding the foregoing, each party may disclose
           -----------
Confidential Information (i) to the extent required by a court of competent
jurisdiction or other governmental authority or otherwise as required by law or
(ii) on a "need-to-know" basis under an obligation of confidentiality to its
legal counsel, accountants, banks and other financing sources and their
advisors.

     12.5  Customer Information.
           --------------------

          (a) All information and data provided to Intuit by users of the
QuickBooks Product or otherwise collected by Intuit relating to user activity on
the QuickBooks Product shall be retained by and owned solely by Intuit.  All
information and data provided by E-Stamp users during the E-Stamp Sign Up
Experience, the E-Stamp Postage Buying Experience or otherwise collected by E-
Stamp relating to user activity related to the use of E-Stamp's electronic
postage software, service or website shall be retained by and owned solely by E-
Stamp.  Each party agrees to use such information only as authorized by the user
and subject to each party's reasonable privacy policies.

          (b) E-Stamp will provide Intuit with information reasonably requested
and necessary to support the calculation of Net Revenues and payments due to
Intuit.

          (c) E-Stamp will use its best commercial efforts to give Intuit
reasonable "blind" access to its database of customers who signed up for the E-
Stamp Service using the QuickBooks Product or through specified Intuit Sites or
by way of Intuit advertising which E-Stamp can track or otherwise confirm as an
Intuit referral; provided that Intuit acknowledges that the information
contained in such database will be subject to the confidentiality obligations
set forth in this Agreement.  To the extent that E-Stamp collects the following
customer information, such "blind" access will include, without limitation,
access to the following customer information:  which customers that have
purchased and are using U.S. Electronic Postage, customers that have evaluated
the E-Stamp Service but decided not to purchase any U.S. Electronic Postage, and
customers that have ceased using the E-Stamp Service

13.  WARRANTY/INDEMNITY/DISCLAIMER

     13.1  E-Stamp Warranties. E-Stamp represents and warrants that (i) it has
           ------------------
full power and authority to enter into this Agreement; (ii) entering into and
performance of this Agreement by E-Stamp does not violate, conflict with, or
result in a material default under any other contract or agreement to which E-
Stamp is a party, or by which it is bound; and (iii) E-Stamp's performance under
this Agreement will not result in an infringement of any third party's patent,
copyright, trademark, or other proprietary rights.

     13.2  Year 2000 Warranty.  E-Stamp represents and warrants to Intuit that
           ------------------
E-Stamp's software products and services covered by this Agreement will not
incur a material loss of performance as a result of the century date change in
the year 2000 or as a result of the year 2000 being a leap year.

                                       10
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

     13.3  Intuit Warranties.  Intuit represents and warrants that (i) it has
           -----------------
full power and authority to enter into this Agreement; and (ii) entering into
and performance of this Agreement by Intuit does not violate, conflict with, or
result in a material default under any other contract or agreement to which
Intuit is a party, or by which it is bound; and (iii) Intuit's performance under
this Agreement will not result in an infringement of any third party's patent,
copyright, trademark, or other proprietary rights.

     13.4  Indemnity.
           ---------

           (a) E-Stamp will defend and/or settle any third party claim brought
against Intuit, its affiliates, officers, directors, employees, consultants and
agents (each, an "Indemnified Party") arising from any claim by a third party of
infringement of a patent, copyright or trademark or misappropriation of a trade
secret anywhere in the world to the extent the same is based upon any such
infringement or misappropriation relating to the E-Stamp Service as delivered by
E-Stamp without modification or combination with any other product or service,
unless such infringement or misappropriation would have existed even in the
absence of such modification or combination.  E-Stamp will indemnify and hold
harmless each such Indemnified Party against any resulting loss, liability, cost
or expense arising out of third party claims, including but not limited to any
amounts awarded in a settlement or by a court against such party (and reasonable
attorneys' fees and out-of-pocket expenses in connection therewith) ("Damages"),
provided that E-Stamp shall have: (i) received from such Indemnified Party
prompt notice of said claim; (ii) received from such Indemnified Party the
exclusive right to control and direct the investigation, defense, or settlement
of such claims; and (iii) received at E-Stamp's expense the reasonable
cooperation and assistance of Indemnified Party.  Subject to E-Stamp's exclusive
right to control, Intuit will have the right to participate in any legal
proceeding related to such a claim at is own expense with counsel of its own
choice.

          (b) In the event that either party's rights or obligations in
connection with the E-Stamp Service is enjoined or otherwise limited either
pursuant to a court determination or a settlement as a direct result of a claim
for which indemnification is proper under Section 13.4(a):

              (i)  E-Stamp shall: (A) substitute for the E-Stamp Service a
service that meets the specifications for the E-Stamp Service in all material
respects; (B) procure for Intuit and Customers the right to continue using the
E-Stamp Service; or, in the event that (A) and (B) are not commercially
practicable within a commercially reasonable period of time, (C) terminate this
Agreement (a "Special Termination"), provided that upon a Special Termination
              -------------------
the terms set forth in subsection (c) below shall apply.

              (ii) Damages shall also include, without limitation, any amounts
Intuit is required to pay to any third party for a claim which would have been
subject to indemnification hereunder if such third party were an Indemnified
Party.

                                       11
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

          (c) In the event of a Special Termination, E-Stamp shall procure for
Intuit at no cost the right of Customers to continue to use the E-Stamp Service
then in use in connection with this Agreement for a period not to exceed ninety
(90) days from notice of Special Termination ("Special Termination Rights").  In
the event E-Stamp is unable to procure the Special Termination Rights, E-Stamp
shall indemnify Intuit for all Damages arising out of third party claims,
including but not limited to Customers' lost profits awarded in a settlement or
by a court, resulting from such inability to procure the Special Termination
Rights for such period.  Nothing in this paragraph shall in any way limit or
otherwise affect Intuit's indemnification rights under subsection (a) with
respect to any Damages associated with the period prior to Special Termination.

          (d) E-Stamp shall be solely responsible for any legal liability
whether in tort, contract, or otherwise arising out of or relating to (i) the E-
Stamp Service and/or E-Stamp's related software and/or (ii) any content or other
material to which users can link through the E-Stamp Service, except to the
extent that such liability was caused by the acts or omissions of any
Indemnified Party.  E-Stamp shall indemnify and hold harmless each Indemnified
Party against any Damages resulting from a claim by a third party to the extent
that such claim is based upon the foregoing ("E-Stamp Portion of the Claim"),
provided that E-Stamp shall have: (i) received from such Indemnified Party
prompt notice of the E-Stamp Portion of the Claim; (ii) received from such
Indemnified Party the exclusive right to control and direct the investigation,
defense, or settlement of the E-Stamp Portion of the Claim; and (iii) received
at E-Stamp's expense the reasonable cooperation and assistance of Indemnified
Party in connection with the E-Stamp Portion of the Claim.  Subject to E-Stamp's
exclusive right to control, Intuit will have the right to participate in any
legal proceeding related to such a claim at is own expense with counsel of its
own choice.

     13.5  DISCLAIMER. EXCEPT AS SPECIFIED IN THIS AGREEMENT, NEITHER PARTY
           ----------
MAKES ANY WARRANTY IN CONNECTION WITH THE SUBJECT MATTER OF THIS AGREEMENT AND
HEREBY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES AND CONDITIONS, INCLUDING
WITHOUT LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE REGARDING SUCH SUBJECT MATTER.

14.  LIMITATION OF LIABILITY

     EXCEPT FOR LIABILITY ARISING UNDER SECTIONS 12, 13.4(a), 13.4(b), OR
13.4(c):

     14.1  IN NO EVENT WILL EITHER PARTY BE LIABLE TO THE OTHER PARTY FOR ANY
SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON BREACH OF
CONTRACT, TORT (INCLUDING NEGLIGENCE) OR OTHERWISE, WHETHER OR NOT IT HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

                                       12
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------

     14.2  THE LIABILITY OF A PARTY FOR DAMAGES OR ALLEGED DAMAGES HEREUNDER,
WHETHER IN CONTRACT, TORT OR ANY OTHER LEGAL THEORY, IS LIMITED TO, AND WILL NOT
EXCEED, THE AMOUNTS PAID BY E-STAMP TO INTUIT UNDER THIS AGREEMENT.

15.  GENERAL

     15.1  Assignment.
           ----------

           (a) Neither party may assign this Agreement, in whole or in part,
without the other party's written consent (which will not be unreasonably
withheld or delayed); provided however, that either party may assign its rights
and obligations hereunder in the event of:

               (i)  a sale of all, or substantially all of such party's assets
                    related to this Agreement, whether by merger,
                    reorganization, operation of law or otherwise; or

               (ii) such party's assignment and/or delegation of its rights and
                    responsibilities hereunder to a wholly-owned subsidiary or
                    joint venture in which the assigning party holds an
                    interest.

Notwithstanding the foregoing, if either party assigns this Agreement to a
direct competitor of the other party by operation of law or otherwise, such
other party will have the right to terminate this Agreement for its convenience.
Any attempt to assign this Agreement other than as permitted above will be null
and void.  Subject to the foregoing, this Agreement shall be binding upon and
shall inure to the benefit of both parties, their successors and permitted
assigns.

          (b) Notwithstanding the terms and conditions of subsection (a) above,
if either party assigns this Agreement to a direct competitor of the other party
("Non-Assigning Party") by operation of law or otherwise:

               (i)  the Non-Assigning Party will have the right to terminate
                    this Agreement for its convenience; and

               (ii) if Intuit is the Non-Assigning Party and Intuit elects to
                    terminate this Agreement pursuant to this subsection (b)
                    prior to E-Stamps payment of the $4,500,000 specified in
                    --------
                    Section 7.1(b), E-Stamp will no longer be obligated to
                    make such $4,500,000 payment to Intuit but will instead
                    pay Intuit $2,250,000 within thirty (30) days of such
                    election by Intuit.

The parties acknowledge that, if Intuit or E-Stamp elects to terminate this
Agreement pursuant to this subsection (b) at any time following E-Stamp's
                                                      ---------
payment of the $4,500,000 specified in Section 7.1(b), Intuit will have the
right to retain the entirety of such payment.

                                       13
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                                                                    CONFIDENTIAL
                                                                    ------------



     15.2  Applicable Law and Jurisdiction.  This Agreement and the performance
           -------------------------------
of the parties under this Agreement shall be governed by and construed in
accordance with the laws of the State of California, U.S.A., except that body of
law concerning conflicts of laws.  In any action relating to the parties, the
parties consent to jurisdiction in a state or federal court in Santa Clara
County, California.

     15.3  Notice. Unless otherwise stated, all notices required under this
           ------
Agreement shall be in writing and shall be considered given (i) when delivered
personally, (ii) within five (5) days of mailing, certified mail, return receipt
requested and postage prepaid (iii) one (1) day after deposit with a commercial
overnight carrier, or (iv) when delivered by facsimile transmission.  All
communications will be addressed as follows (unless changed by notice):

          To E-Stamp:    E-Stamp Corporation
                         2855 Campus Drive
                         San Mateo, California 94403
                         Attn: Robert Ewald, President and CEO
                         Attn: Edward Malysz, Vice President and General Counsel
                         Fax:  650.554.8455

          To Intuit:     If hand delivered or faxed:
                         --------------------------
                         Intuit Inc.
                         2535 Garcia Avenue MS 2550
                         Mountain View, California  94043
                         Attn:  General Counsel
                         Fax:  650.944.5656

                         If mailed:
                         ---------
                         Intuit Inc.
                         P.O. Box 7850 MS 2550
                         Mountain View, CA  94039-7850
                         Attn:  General Counsel

     15.4  No Agency.  The parties are independent contractors and will have no
           ---------
power or authority to assume or create any obligation or responsibility on
behalf of each other.  This Agreement will not be construed to create or imply
any partnership, agency or joint venture.

     15.5  Force Majeure.  Any delay in or failure of performance by either
           -------------
party under this Agreement will not be considered a breach of this Agreement and
will be excused to the extent caused by any occurrence beyond the reasonable
control of such party including, but not limited to, acts of God, power outages,
failures of the Internet, and E-Stamp's failure to obtain any necessary
governmental approval required in connection with the performance of its
obligations hereunder.  In the event that the duration of such delay or failure
of performance by either party exceeds thirty (30) days, the other party will
have the right to terminate this Agreement at its

                                       14
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                                                                    CONFIDENTIAL
                                                                    ------------

convenience. If E-Stamp so terminates this Agreement following Intuit's delay in
or failure of performance, Intuit will pay E-Stamp the unamortized portion of
the fees paid by E-Stamp to Intuit under Section 7.1, based on a straight-line
pro rata amortization of such fees beginning on the Effective Date and ending on
December 31, 2000.

     15.6  Severability.  In the event that any of the provisions of this
           ------------
Agreement are held to be unenforceable by a court or arbitrator, the remaining
portions of the Agreement will remain in full force and effect.

     15.7  Entire Agreement.  This Agreement is the complete and exclusive
           ----------------
agreement between the parties with respect to the subject matter hereof,
superseding any prior agreements and communications (both written and oral)
regarding such subject matter.  This Agreement may only be modified, or any
rights under it waived, by a written document executed by both parties.

     15.8  Counterparts.  This Agreement may be executed in counterparts, each
           ------------
of which will serve to evidence the parties' binding agreement.

E-Stamp Corporation               Intuit Inc.

By:    /s/ Edward F. Malysz       By:    /s/ James J. Heeger
       ---------------------             ---------------------

Name:  Edward F. Malysz           Name:  James J. Heeger
       ---------------------             ---------------------

Title: V.P., General Counsel      Title: SVP, Small Bus. Div.
       ---------------------             ---------------------

Date:         9/24/99             Date:         9/24/99
       ---------------------             ---------------------

                                       15
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                                                                    CONFIDENTIAL
                                                                    ------------

                                   SCHEDULE A
                              Program Description


1)   Marketing and Promotional Programs, to be implemented from Effective Date
through December 31, 2001.

     a)   Intuit Obligations

          i)    Intuit shall promote the E-Stamp Service in four (4) editions of
                the QB.com newsletter in an area at Intuit's sole discretion.
                Intuit shall consider in good faith any applicable requests
                received from E-Stamp in a timely manner. 1st promotion by
                October 1999, 2nd promotion by January 2000, 3rd promotion by
                January 2001, 4th promotion by July 2001.

          ii)   Intuit shall provide E-Stamp with a presence on the
                QuickBooks.com Site within an area at Intuit's sole discretion.
                Intuit shall consider in good faith any applicable requests
                received from E-Stamp in a timely manner. Placement by
                October 15, 1999.

          iii)  Intuit shall include a description of E-Stamp Service and
                QuickBooks Product Integration in press tour and press materials
                related to all version releases of the QuickBooks Products
                during the term of the Agreement. Inclusion by October 1999.

          iv)   Intuit shall describe E-Stamp Service and QuickBooks Product
                Integration on QuickBooks retail box. Description by
                January 2000.

          v)    Intuit shall describe E-Stamp Service and QuickBooks Product
                Integration in upgrade mailings sent to installed base.
                Description by February 2000.

          vi)   Intuit shall provide E-Stamp with the opportunity to rent lists
                of QuickBooks Products, non-upgrade, non-Intuit Supplies
                business customers under Intuit's then-current standard terms.
                List available by May 2000, or earlier to the extent mutually
                agreed by the parties.

          vii)  Intuit shall include a description of E-Stamp Service and
                QuickBooks Product Integration in CD-ROMvelope for QuickBooks CD
                product skus. Description by January 2000.

          viii) Intuit has the option to use E-Stamp Service as a part of a
                QuickBooks product promotion in direct mailings on mutually
                agreed terms.

     b)   E-Stamp Obligations

                                       16
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------


     Subject to Intuit's approval and to Section 10:

          i)    E-Stamp has the option to include QuickBooks Service Logo in
                marketing materials, packaging, and on other marketing
                collateral, subject to Section 10 (Trademark Ownership and
                License).

          ii)   E-Stamp has the option to include QuickBooks insert into E-Stamp
                retail box.

          iii)  E-Stamp has the option to include recommendation/reference to
                QuickBooks on their website.

2)   Product Integration Programs

     a)   Intuit Obligations

          i)    Include access to E-Stamp service in areas of QuickBooks product
                designated by Intuit for the purpose of driving awareness of the
                E-Stamp Service in QuickBooks Products.

          ii)   Include access to the E-Stamp Sign Up Experience and the E-Stamp
                Postage Buying Experience functionality in the QuickBooks
                Product navigational areas, as designated by Intuit in its sole
                discretion. Intuit shall consider in good faith any applicable
                requests received from E-Stamp in a timely manner.

          iii)  Allow QuickBooks 2001 product customers to [***] directly
                [***] from within QuickBooks 2001 product.

     b)   E-Stamp Obligations

          i)    Provide access to the E-Stamp Postage Buying Experience to
                Customers and prospective Customers. Access by October 1999.

          ii)   Provide access to the E-Stamp Sign Up Experience to Customers
                and prospective Customers through a Web page on the E-Stamp Site
                that will be co-branded by Intuit and E-Stamp ("Co-Branded
                Page"). The Co-Branded Page will be designed by Intuit and will
                be hosted by E-Stamp. The contents of the Co-Branded Page will
                be mutually agreed by the parties, but will in no event contain
                any graphic or textual hyperlinks, promotions, logos or
                advertising banners of any principal competitor of Intuit
                specified in Schedule B as amended in accordance with the
                             ----------
                provisions of Schedule B. Access by October 1999.
                              ----------

          iii)  To the extent that screens displayed to Customers during their
                experience on the E-Stamp Site are framed by Intuit, such
                experience will be limited to the E-Stamp Sign

***  Confidential treatment has been requested for the bracketed portions.  The
     confidential redacted portion has been omitted and filed separately with
     the Securities and Exchange Commission.

                                       17
<PAGE>

                                                                    CONFIDENTIAL
                                                                    ------------


                Up Experience and the E-Stamp Postage Buying Experience except
                as may be mutually agreed by the parties in writing. Provided by
                December 1999.

          iv)   At E-Stamp's expense, provide mutually agreed upon customized
                development work and developer support for integration efforts,
                including documentation or access to E-Stamp technical
                resources. Beginning September 1999.

          v)    Provide compiled versions of key functionality that will be
                integrated with QuickBooks to allow customers to print postage
                directly onto forms and labels and to receive reporting and
                summary information from within QuickBooks 2001 product.
                Beginning May 2000.

          vi)   Provide maintenance releases to Intuit as necessary and
                available.

                                       18
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                                                                    CONFIDENTIAL
                                                                    ------------


                                   SCHEDULE B
                               Intuit Competitors

Peachtree
MYOB
DacEasy
Great Plains
Accpac
Simply Accounting
Business Works
Mas 90
NetLedger
ADP
Paycheck
BigStep
Geocities
Tripod
Microsoft and all companies in which Microsoft, to the best of E-Stamp's
knowledge, owns or controls at least 20% of the outstanding equity
Ariba
Intelisys
CommerceOne
NEBS (sells supplies)

The parties agree that from time to time Intuit may, upon adequate written
notice to E-Stamp, add to this list additional entities that market products
and/or services in competition with Intuit,  subject to E-Stamp's then-existing
contractual obligations to such additional entities.

                                       19
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                                                                    CONFIDENTIAL
                                                                    ------------

                                   SCHEDULE C
                         Support Response Requirements


  1. Email Response Turn Around Time (TAT):  24 hours or less.

  2. Inbound Telephone Calls Service Level:  80% of calls answered in 30 seconds
     or less.

                                       20
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                                                                    CONFIDENTIAL
                                                                    ------------

                                   SCHEDULE D
                            E-Stamp Site Performance


1.   The E-Stamp Site, including all site functionality, will be up no less than
98% of the following times:  7 days/week, 24 hours/day.

                                       21

<PAGE>

                                                                    Exhibit 23.2


               CONSENT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

   We consent to the references to our firm under the captions "Experts" and
"Selected Financial Data" and to the use of our report dated February 19, 1999,
except for the "Stock Subject to Rescission" paragraphs of Note 4 and for Note
10 as to which the date is October 6, 1999, in Amendment No. 5 to the
Registration Statement (Form S-1 No. 333-85359) and related Prospectus of E-
Stamp Corporation.

                                           /s/ Ernst & Young LLP

Palo Alto, California

October 6, 1999


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