SOUTHERN CO
SC 13E4, 1997-11-03
ELECTRIC SERVICES
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<PAGE>   1

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                 SCHEDULE 13E-4
                          ISSUER TENDER OFFER STATEMENT
                 (Pursuant to Section 13(e)(1) of the Securities
                              Exchange Act of 1934)

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

                            MISSISSIPPI POWER COMPANY
                                (Name of Issuer)

                              THE SOUTHERN COMPANY
                      (Name of Person(s) Filing Statement)

                  TITLE                                    CUSIP NUMBER

- -----------------------------------------------------------------------------
            Mississippi Power Company,
                 Preferred Stock
                  4.40% Series                             605417203
                  4.60% Series                             605417302
                  4.72% Series                             605417401

- ------------------------------------------------------------------------------
                         (Title of Class of Securities)
                      (CUSIP Number of Class of Securities)

                            Tommy Chisholm, Secretary
                              The Southern Company
                           270 Peachtree Street, N.W.
                             Atlanta, Georgia 30303
                                 (770) 393-0650

       (Name, Address and Telephone Number of Person Authorized to Receive
     Notices and Communications on Behalf of the Person(s) Filing Statement)

        The Commission is requested to mail signed copies of all orders,
                         notices and communications to:

         W. L. Westbrook                        John D. McLanahan, Esq.
     Financial Vice President                    Troutman Sanders LLP
       The Southern Company               600 Peachtree Street, N.E., Suite 5200
    270 Peachtree Street, N.W.                  Atlanta, Georgia 30308
      Atlanta, Georgia 30303


<PAGE>   2

                                November 3, 1997
                       (Date Tender Offer First Published,
                       Sent or Given to Security Holders)

<TABLE>
<CAPTION>

                            CALCULATION OF FILING FEE
TRANSACTION VALUATION*                               AMOUNT OF FILING FEE
<S>                                                  <C>
$9,886,813                                           $1,978
</TABLE>

*        Solely for purposes of calculating the filing fee and computed pursuant
         to Section 13(e)(3) of the Securities Exchange Act of 1934, as amended,
         and Rule 0-11(b)(1) thereunder, the transaction value equals the total
         amount of funds, excluding fees and other expenses, required to
         purchase all outstanding shares of each series of securities listed
         above pursuant to the Offer described in the Offer to Purchase and
         Proxy Statement filed as an Exhibit hereto.

         / / Check box if any part of the fee is offset as provided by Rule
0-11(a)(2) and identify the filing with which the offsetting fee was previously
paid. Identify the previous filing by registration statement number, or the Form
or Schedule and the date of its filing.

Amount Previously Paid:    Not applicable

Form or Registration No.:  Not applicable

Filing Party:              Not applicable

Date Filed:                Not applicable

                                       2
<PAGE>   3


ITEM 1.  SECURITY AND ISSUER.

         (a) Mississippi Power Company, a Mississippi corporation (the
"Company"), is the issuer. The Company's principal executive office is at 2992
West Beach, Gulfport, Mississippi 39501.

         (b) Incorporated herein by reference to the information appearing on
the front cover of the Offer to Purchase and Proxy Statement, dated November 3,
1997, filed as Exhibit 99.(a)(1) to this Issuer Tender Offer Statement on
Schedule 13E-4 (the "Offer to Purchase and Proxy Statement"), and to the
information appearing under the captions "Terms of the Offer - Number of Shares;
Purchase Prices; Expiration Date" and "Transactions and Agreements Concerning
the Shares" in the Offer to Purchase and Proxy Statement.

         (c) Incorporated herein by reference to the information appearing under
the caption "Price Range of Shares; Dividends" in the Offer to Purchase and
Proxy Statement.

         (d) The Southern Company, a Delaware corporation ("Southern"), is the
person filing this Statement and is the owner of 100% of the common stock of the
Company. Southern's principal office is at 270 Peachtree Street, N.W., Atlanta,
Georgia 30303.

ITEM 2.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

         (a)-(b) Incorporated herein by reference to the information appearing
under the caption "Source and Amount of Funds" in the Offer to Purchase and
Proxy Statement.

ITEM 3.  PURPOSE OF THE TENDER OFFER AND PLANS OR PROPOSALS OF THE ISSUER OR
AFFILIATE.

         Incorporated herein by reference to the information appearing under the
caption "Purpose of the Offer; Certain Effects of the Offer" in the Offer to
Purchase and Proxy Statement.

ITEM 4.  INTEREST IN SECURITIES OF THE ISSUER.

         Incorporated herein by reference to the information appearing under the
caption "Transactions and Agreements Concerning the Shares" in the Offer to
Purchase and Proxy Statement.

IteM 5.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
TO THE ISSUER'S SECURITIES.

         Incorporated herein by reference to the information appearing under
the caption "Transactions and Agreements Concerning the Shares" in the Offer to
Purchase and Proxy Statement.

ITEM 6.  PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED.

         Incorporated herein by reference to the information appearing under the
caption "Fees and Expenses Paid to Dealers" in the Offer to Purchase and Proxy
Statement.

                                       3
<PAGE>   4

ITEM 7.  FINANCIAL INFORMATION.

         (a) Incorporated herein by reference to the financial statements
included in the Annual Report on Form 10-K for the year ended December 31, 1996
of the Company, to the financial statements included in the Quarterly Reports on
Form 10-Q for the quarters ended March 31, 1997 and June 30, 1997 of the Company
and to the information appearing under the caption "Summary of Financial
Information" in the Offer to Purchase and Proxy Statement.

         (b)      Not applicable.

ITEM 8.  ADDITIONAL INFORMATION.

         (a)      Not applicable.

         (b) Incorporated herein by reference to the information appearing under
the caption "Terms of the Offer - Certain Conditions of the Offer" in the Offer
to Purchase and Proxy Statement.

         (c)      Not applicable.

         (d)      Not applicable.

         (e)      See Exhibits 99.(a)(1) and 99.(a)(2).

ITEM 9.  MATERIAL TO BE FILED AS EXHIBITS.


<TABLE>
<CAPTION>
EXHIBIT NO.              DESCRIPTION
<S>        <C>
99.(a)(1)  Offer to Purchase and Proxy Statement, dated November 3, 1997.
99.(a)(2)  Letter of Transmittal and Proxy for each series of securities.
99.(a)(3)  Notice of Guaranteed Delivery and Proxy.  
99.(a)(4)  Letter to Brokers, Dealers, Commercial Banks, Trust Companies and other Nominees.
99.(a)(5)  Letter To Clients of Brokers, Dealers, Commercial Banks, Trust
           Companies and other Nominees.
99.(a)(6)  Advertisement, dated November 3, 1997.
99.(a)(7)  Letter to Shareholders, dated November 3, 1997.
99.(a)(8)  Press Release, dated November 3, 1997.
99.(a)(9)  Guidelines for Certification of Taxpayer Identification Number
           on Substitute Form W-9.  
99.(a)(10) Summary Simplified Instructions.
99.(a)(11) Form of Follow-up Notice to Shareholders.
99.(a)(12) Summary DTC Participant Proxy Form.
99.(b)     Not applicable.
99.(c)     Not applicable.
99.(d)     Tax Opinion of Troutman Sanders LLP.
99.(e)     Not applicable.
99.(f)     Not applicable.
</TABLE>


                                       4
<PAGE>   5

                                    SIGNATURE

         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated:   November 3, 1997

                                    THE SOUTHERN COMPANY

                                    By: /s/ Tommy Chisholm
                                       -------------------------
                                            Tommy Chisholm
                                            Secretary

                                       5
<PAGE>   6


                                  EXHIBIT INDEX


<TABLE>
<S>        <C>
99.(a)(1)  Offer to Purchase and Proxy Statement, dated November 3, 1997.
99.(a)(2)  Letter of Transmittal and Proxy for each series of securities.
99.(a)(3)  Notice of Guaranteed Delivery and Proxy. 99.(a)(4) Letter to
           Brokers, Dealers, Commercial Banks, Trust Companies and other 
           Nominees.
99.(a)(5)  Letter to Clients of Brokers, Dealers, Commercial Banks, Trust
           Companies and other Nominees. 99.(a)(6) Advertisement, dated November
           3, 1997.
99.(a)(7)  Letter to Shareholders, dated November 3, 1997.
99.(a)(8)  Press Release, dated November 3, 1997.
99.(a)(9)  Guidelines for Certification of Taxpayer Identification Number
           on Substitute Form W-9.
99.(a)(10) Summary Simplified Instructions.
99.(a)(11) Form of Follow-up Notice to Shareholders.
99.(a)(12) Summary DTC Participant Proxy Form.
99.(b)     Not applicable.
99.(c)     Not applicable.
99.(d)     Tax Opinion of Troutman Sanders LLP.
99.(e)     Not applicable.
99.(f)     Not applicable.
</TABLE>

                                       6

<PAGE>   1
 
OFFER TO PURCHASE AND PROXY STATEMENT
 
                              THE SOUTHERN COMPANY
                           OFFER TO PURCHASE FOR CASH
           ANY AND ALL OUTSTANDING SHARES OF THE FOLLOWING SERIES OF
                               PREFERRED STOCK OF
 
                           MISSISSIPPI POWER COMPANY
          40,000 SHARES, PREFERRED STOCK, $100 PAR VALUE, 4.40% SERIES
        AT A PURCHASE PRICE OF $87.13 PER SHARE, CUSIP NUMBER 605417203
          20,099 SHARES, PREFERRED STOCK, $100 PAR VALUE, 4.60% SERIES
        AT A PURCHASE PRICE OF $85.98 PER SHARE, CUSIP NUMBER 605417302
          50,000 SHARES, PREFERRED STOCK, $100 PAR VALUE, 4.72% SERIES
        AT A PURCHASE PRICE OF $93.47 PER SHARE, CUSIP NUMBER 605417401
 
                           MISSISSIPPI POWER COMPANY
                                PROXY STATEMENT
              WITH RESPECT TO ITS COMMON STOCK AND PREFERRED STOCK
                            ------------------------
 
   THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME,
ON DECEMBER 10, 1997, UNLESS THE OFFER IS EXTENDED.
                            ------------------------
 
   The Southern Company, a Delaware corporation ("Southern"), invites the
holders of the 4.40% Series, the 4.60% Series and the 4.72% Series of preferred
stock listed above (each a "Series of Preferred," and the holder thereof a
"Preferred Shareholder") of Mississippi Power Company, a Mississippi corporation
and direct utility subsidiary of Southern (the "Company"), to tender any and all
of their shares of a Series of Preferred ("Shares") for purchase at the purchase
price per Share listed above, net to the seller in cash, upon the terms and
subject to the conditions set forth in this Offer to Purchase and Proxy
Statement and in the accompanying Letter of Transmittal and Proxy (which
together constitute the "Offer"). Southern will purchase any and all Shares
validly tendered and not withdrawn, upon the terms and subject to the conditions
of the Offer. In addition, the Company has declared and will pay a dividend
attributable to the period ending on the Payment Date (as defined herein) to
each holder of a tendered Share that is purchased by Southern pursuant to the
Offer. See "Terms of the Offer -- Certain Conditions of the Offer" and "Terms of
the Offer -- Extension of Tender Period; Termination; Amendments."
   THE OFFER FOR A SERIES OF PREFERRED IS NOT CONDITIONED UPON ANY MINIMUM
NUMBER OF SHARES OF SUCH SERIES OF PREFERRED BEING TENDERED AND IS INDEPENDENT
OF THE OFFER FOR ANY OTHER SERIES OF PREFERRED. PREFERRED SHAREHOLDERS
(INCLUDING PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES SUBSEQUENT TO THE RECORD
DATE (AS HEREINAFTER DEFINED) AND WHO FOLLOW THE REQUIRED PROCEDURES APPLICABLE
TO SUCH SHARES) WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE
IN FAVOR OF THE PROPOSED AMENDMENT, AS DESCRIBED BELOW. THE OFFER IS CONDITIONED
UPON THE APPROVAL OF THE SECURITIES AND EXCHANGE COMMISSION (THE "COMMISSION")
UNDER THE PUBLIC UTILITY HOLDING COMPANY ACT OF 1935, AS AMENDED (THE "HOLDING
COMPANY ACT"), AND UPON, AMONG OTHER THINGS, THE PROPOSED AMENDMENT, AS
DESCRIBED BELOW, BEING APPROVED AND ADOPTED AT THE SPECIAL MEETING (AS DEFINED
BELOW). SEE "TERMS OF THE OFFER -- CERTAIN CONDITIONS OF THE OFFER."
   IN ORDER TO VALIDLY TENDER SHARES PURSUANT TO THE OFFER, PREFERRED
SHAREHOLDERS WHO ACQUIRE SHARES DURING THE PERIOD BEGINNING TWO DAYS PRIOR TO
THE RECORD DATE AND UP TO AND INCLUDING THE EXPIRATION DATE (AS HEREINAFTER
DEFINED) MUST OBTAIN AN ASSIGNMENT OF PROXY FROM THE SELLER OF SUCH SHARES AND
VOTE SUCH PROXY IN FAVOR OF THE PROPOSED AMENDMENT. IN ORDER TO FACILITATE THE
TRANSFER OF SHARES DURING THE PERIOD DESCRIBED ABOVE, THE SHARES OF EACH SERIES
OF PREFERRED WILL TRADE "WITH PROXY" IN THE OVER-THE-COUNTER MARKET. SETTLEMENT
OF ALL TRADES DURING THE PERIOD DESCRIBED ABOVE SHOULD INCLUDE AN ASSIGNMENT OF
PROXY FROM THE SELLER. SEE "TERMS OF THE OFFER -- PROCEDURE FOR TENDERING
SHARES." FOR FURTHER INFORMATION, CALL THE INFORMATION AGENT (AS HEREINAFTER
DEFINED) OR THE DEALER MANAGER (AS HEREINAFTER DEFINED) OR CONSULT YOUR BROKER
FOR ASSISTANCE.
   Concurrently with the Offer, the Board of Directors of the Company is
soliciting proxies from the holders of each series of the Company's outstanding
preferred stock (which, in addition to each Series of Preferred included in this
Offer, consists of all other outstanding series of the Company's preferred
stock) for use at the Special Meeting of Shareholders of the Company to be held
at the offices of its affiliate Georgia Power Company, 333 Piedmont Avenue,
N.E., Atlanta, Georgia, on December 10, 1997 at 4:15 p.m., Eastern time, or any
adjournment or postponement of such meeting (the "Special Meeting"). The Special
Meeting, notice of which is hereby given, is being held to consider an amendment
(the "Proposed Amendment") to the Company's Articles of Incorporation, as
amended (the "Charter"), which would eliminate the provisions in the Charter
restricting the ability of the Company to issue unsecured indebtedness, to sell
assets, merge or consolidate and to pay dividends on its common stock in the
event that its common equity capitalization falls below certain levels.
PREFERRED SHAREHOLDERS (INCLUDING PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES
SUBSEQUENT TO THE RECORD DATE AND WHO FOLLOW THE REQUIRED PROCEDURES APPLICABLE
TO SUCH SHARES) WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST
SUBMIT A DULY COMPLETED, VALID AND UNREVOKED PROXY INDICATING THEIR VOTE IN
FAVOR OF THE PROPOSED AMENDMENT OR INDICATE IN THE ACCOMPANYING LETTER OF
TRANSMITTAL AND PROXY THEIR INTENTION TO VOTE FOR THE PROPOSED AMENDMENT AT THE
SPECIAL MEETING. HOWEVER, PREFERRED SHAREHOLDERS WHO POSSESS THE PROXY WITH
RESPECT TO SUCH SHARES HAVE THE RIGHT TO VOTE FOR THE PROPOSED AMENDMENT
REGARDLESS OF WHETHER THEY TENDER THEIR SHARES. IF THE PROPOSED AMENDMENT IS
APPROVED AND ADOPTED BY THE COMPANY'S SHAREHOLDERS, THE COMPANY WILL MAKE A
SPECIAL CASH PAYMENT ("SPECIAL CASH PAYMENT") IN THE AMOUNT EQUAL TO 1.00% OF
THE PAR VALUE PER SHARE (OR $1.00 PER SHARE) FOR EACH SHARE PROPERLY VOTED IN
FAVOR OF THE PROPOSED AMENDMENT, PROVIDED THAT SUCH SHARES HAVE NOT BEEN
TENDERED PURSUANT TO THE OFFER. THOSE PREFERRED SHAREHOLDERS WHO VALIDLY TENDER
THEIR SHARES WILL BE ENTITLED ONLY TO THE PURCHASE PRICE PER SHARE LISTED ABOVE
PLUS FROM THE COMPANY THE INTERIM DIVIDEND (AS DEFINED HEREIN). TENDERING
PREFERRED SHAREHOLDERS WILL NOT BE ENTITLED TO THE SPECIAL CASH PAYMENT.
   Preferred Shareholders are entitled to assert dissenters' rights and demand
payment for their Shares under Article 13 of the Mississippi Business
Corporation Act, which is set forth in its entirety as Appendix B to this Offer
to Purchase and Proxy Statement. A Preferred Shareholder who wishes to assert
dissenters' rights must not vote his Shares in favor of the Proposed Amendment
and, therefore, cannot validly tender Shares pursuant to the Offer or receive
the Special Cash Payment. See "Proposed Amendment and Proxy
Solicitation -- Rights of Dissenting Shareholders."
                            ------------------------
 
   The Company will pay a solicitation fee for Shares tendered, accepted for
payment and paid for pursuant to the Offer, subject to certain conditions. See
"Fees and Expenses Paid to Dealers."
                            ------------------------
 
   THIS TRANSACTION HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE COMMISSION NOR HAS THE COMMISSION PASSED UPON THE FAIRNESS OR MERITS OF
THIS TRANSACTION NOR UPON THE ACCURACY OR ADEQUACY OF THE INFORMATION CONTAINED
IN THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS UNLAWFUL.
                            ------------------------
 
   NEITHER SOUTHERN, THE COMPANY, THEIR RESPECTIVE BOARDS OF DIRECTORS, NOR ANY
OF THEIR RESPECTIVE OFFICERS MAKES ANY RECOMMENDATION TO ANY PREFERRED
SHAREHOLDER AS TO WHETHER TO TENDER ANY OR ALL SHARES. EACH PREFERRED
SHAREHOLDER MUST MAKE HIS OR HER OWN DECISION AS TO WHETHER TO TENDER SHARES
AND, IF SO, HOW MANY SHARES TO TENDER.
                            ------------------------
 
   THE COMPANY'S BOARD OF DIRECTORS RECOMMENDS VOTING FOR THE PROPOSED
AMENDMENT.
                            ------------------------
 
   This Offer to Purchase and Proxy Statement is first being mailed on or about
November 3, 1997. The record date with respect to the Shares is November 6,
1997.
                            ------------------------
 
   Each Series of Preferred is traded in the over-the-counter market (the "OTC")
and is not listed on any national securities exchange. On October 30, 1997, the
last reported sale price as reported by the National Quotation Bureau, LLC was
$66.00 for the 4.40% Series (on September 16, 1997), $60.625 for the 4.60%
Series (on October 23, 1997) and $77.25 for the 4.72% Series (on October 16,
1997). Preferred Shareholders are urged to obtain a current market quotation for
the Shares.
                            ------------------------
 
                      The Dealer Manager for the Offer is:
 
                              MERRILL LYNCH & CO.
The date of this Offer to Purchase and Proxy Statement is November 3, 1997.
<PAGE>   2
 
     NO PERSON HAS BEEN AUTHORIZED TO MAKE ANY RECOMMENDATION ON BEHALF OF
SOUTHERN OR THE COMPANY AS TO WHETHER PREFERRED SHAREHOLDERS SHOULD TENDER OR
REFRAIN FROM TENDERING SHARES OF ANY SERIES OF PREFERRED PURSUANT TO THE OFFER.
NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS IN CONNECTION WITH THE OFFER OTHER THAN THOSE CONTAINED HEREIN
OR IN THE RELATED LETTER OF TRANSMITTAL AND PROXY. IF GIVEN OR MADE, SUCH
RECOMMENDATION AND SUCH INFORMATION AND REPRESENTATIONS MUST NOT BE RELIED UPON
AS HAVING BEEN AUTHORIZED BY SOUTHERN OR THE COMPANY.
 
                                   IMPORTANT
 
     Any Preferred Shareholder desiring to accept the Offer and tender all or
any portion of his or her Shares should, in addition to voting in favor of the
Proposed Amendment either by executing and returning the enclosed Letter of
Transmittal and Proxy or by voting in person by ballot at the Special Meeting,
either (i) if not the record holder, request his or her broker, dealer,
commercial bank, trust company or nominee to effect the transaction for him or
her, or (ii) if the record holder, complete and sign the Letter of Transmittal
and Proxy, in accordance with the instructions in such Letter of Transmittal and
Proxy, mail or deliver the same and any other required documents to The Bank of
New York (the "Depositary"), and deliver the certificates for such Shares to the
Depositary, along with the Letter of Transmittal and Proxy, or tender such
Shares pursuant to the procedure for book-entry transfer set forth below under
"Terms of the Offer -- Procedure for Tendering Shares," on or prior to the
Expiration Date (as defined below). A Preferred Shareholder whose Shares are
registered in the name of a broker, dealer, commercial bank, trust company or
nominee must contact such broker, dealer, commercial bank, trust company or
nominee if he or she desires to tender such Shares. Any Preferred Shareholder
who desires to tender Shares and whose certificates for such Shares are not
immediately available, or who cannot comply in a timely manner with the
procedure for book-entry transfer, should tender such Shares by following the
procedures for guaranteed delivery set forth below under "Terms of the
Offer -- Procedure for Tendering Shares."
 
     EACH SERIES OF PREFERRED HAS ITS OWN LETTER OF TRANSMITTAL AND PROXY, AND
ONLY THE APPLICABLE LETTER OF TRANSMITTAL AND PROXY FOR SUCH TENDERED SERIES OF
PREFERRED OR A NOTICE OF GUARANTEED DELIVERY AND PROXY MAY BE USED TO TENDER
SHARES OF SUCH SERIES OF PREFERRED. A LETTER OF TRANSMITTAL AND PROXY MAY BE
USED TO VOTE IN FAVOR OF THE PROPOSED AMENDMENT EVEN IF NO SHARES ARE BEING
TENDERED.
 
     Questions or requests for assistance may be directed to Corporate Investor
Communications, Inc. (the "Information Agent") or to Merrill Lynch & Co.
("Merrill Lynch" or the "Dealer Manager") at their respective telephone numbers
and addresses set forth on the back cover of this Offer to Purchase and Proxy
Statement. Requests for additional copies of this Offer to Purchase and Proxy
Statement, the applicable Letter of Transmittal and Proxy or other tender offer
or proxy materials may be directed to the Information Agent, and such copies
will be furnished promptly at the Company's expense. Preferred Shareholders may
also contact their local broker, dealer, commercial bank or trust company for
assistance concerning the Offer.
 
                                        2
<PAGE>   3
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
SUMMARY.....................................................     4
TERMS OF THE OFFER..........................................     7
  Number of Shares; Purchase Prices; Expiration Date;
     Dividends..............................................     7
  Procedure for Tendering Shares............................     8
  Withdrawal Rights.........................................    10
  Acceptance of Shares for Payment and Payment of Purchase
     Price and Dividends....................................    11
  Certain Conditions of the Offer...........................    12
  Extension of Tender Period; Termination; Amendments.......    14
PROPOSED AMENDMENT AND PROXY SOLICITATION...................    15
  Introduction..............................................    15
  Voting Shares.............................................    15
  Voting Requirements and Procedures........................    15
  Proxies...................................................    16
  Special Cash Payments.....................................    16
  Security Ownership of Certain Beneficial Owners and
     Management.............................................    17
  Business to Come Before the Special Meeting...............    17
  Explanation of the Proposed Amendment.....................    18
  Reasons for the Proposed Amendment........................    18
  Rights of Dissenting Shareholders.........................    19
  Independent Public Accountants............................    21
PRICE RANGE OF SHARES; DIVIDENDS............................    21
PURPOSE OF THE OFFER; CERTAIN EFFECTS OF THE OFFER..........    22
CERTAIN FEDERAL INCOME TAX CONSEQUENCES.....................    24
SOURCE AND AMOUNT OF FUNDS..................................    27
TRANSACTIONS AND AGREEMENTS CONCERNING THE SHARES...........    27
FEES AND EXPENSES PAID TO DEALERS...........................    28
CERTAIN INFORMATION REGARDING SOUTHERN AND THE COMPANY......    29
SUMMARY OF FINANCIAL INFORMATION............................    30
MISCELLANEOUS...............................................    32
APPENDIX A..................................................   A-1
APPENDIX B..................................................   B-1
</TABLE>
 
                                        3
<PAGE>   4
 
                                    SUMMARY
 
     The following summary is provided solely for the convenience of the
Preferred Shareholders. This summary is not intended to be complete and is
qualified in its entirety by reference to the full text and more specific
details contained in this Offer to Purchase and Proxy Statement and the Letter
of Transmittal and Proxy and any amendments or supplements hereto or thereto.
Preferred Shareholders are urged to read this Offer to Purchase and Proxy
Statement and the Letter of Transmittal and Proxy in their entirety. Each of the
capitalized terms used in this summary and not defined herein has the meaning
set forth elsewhere in this Offer to Purchase and Proxy Statement.
 
Southern and the Company...  Southern, 270 Peachtree Street, N.W., Atlanta,
                               Georgia 30303, is a registered holding company
                               under the Holding Company Act which owns all of
                               the outstanding common stock of its electric
                               utility subsidiaries, including the Company. The
                               service area of Southern's electric utility
                               subsidiaries covers portions of Alabama, Florida,
                               Georgia and Mississippi. The Company, 2992 West
                               Beach, Gulfport, Mississippi 39501, is a utility
                               primarily engaged in the generation, purchase,
                               transmission and distribution of electric power
                               to approximately 190,000 customers in
                               southeastern Mississippi, and in supplying
                               electric power at wholesale to other electric
                               utility companies and municipalities.
 
The Series of Preferred
Stock......................  4.40% Preferred Stock (par value $100 per share)
                             4.60% Preferred Stock (par value $100 per share)
                             4.72% Preferred Stock (par value $100 per share)
 
The Offer and Purchase
Price......................  Offer to purchase any or all Shares of each Series
                               of Preferred at the price set forth below.
                               $87.13 per 4.40% Share
                               $85.98 per 4.60% Share
                               $93.47 per 4.72% Share
 
Dividends..................  The Company has declared and will pay to tendering
                               Preferred Shareholders a dividend attributable to
                               the period ending on the Payment Date (the
                               "Interim Dividend") on tendered Shares that are
                               purchased by Southern pursuant to the Offer.
                               Tendering Preferred Shareholders will not be
                               entitled to any dividends in respect of any later
                               dividend periods (or any portion thereof).
 
Independent Offer..........  The Offer for one Series of Preferred is
                               independent of the Offer for any other Series of
                               Preferred. The Offer is not conditioned upon any
                               minimum number of Shares of the respective Series
                               of Preferred being tendered. Preferred
                               Shareholders who wish to tender their Shares must
                               vote in favor of the Proposed Amendment. The
                               Offer is subject to shareholder approval of the
                               Proposed Amendment and certain other conditions.
 
Commission Approval........  The Offer is conditioned, among other things, upon
                               the approval of the Commission under the Holding
                               Company Act.
 
Expiration Date of the
Offer......................  The Offer expires at 5:00 p.m., New York City time,
                               on December 10, 1997, unless extended (the
                               "Expiration Date").
 
How to Tender Shares.......  Preferred Shareholders (including Preferred
                               Shareholders who acquire Shares subsequent to the
                               Record Date) who wish to tender their Shares must
                               vote in favor of the Proposed Amendment.
                               Preferred Shareholders who purchase or whose
                               purchase is registered after the
                                        4
<PAGE>   5
 
                               Record Date and who wish to tender their Shares
                               must arrange with their seller to receive an
                               assignment of proxy from the holder of record on
                               the Record Date. See "Terms of the
                               Offer -- Procedure for Tendering Shares." For
                               further information, call the Information Agent
                               or the Dealer Manager or consult your broker for
                               assistance.
 
Withdrawal Rights..........  Tendered Shares of any Series of Preferred may be
                               withdrawn at any time until the Expiration Date
                               with respect to such Series of Preferred and,
                               unless previously accepted for payment, may also
                               be withdrawn after January 2, 1998. See "Terms of
                               the Offer -- Withdrawal Rights." The proxy
                               accompanying any tendered Shares that are
                               withdrawn will not be considered revoked unless
                               the Preferred Shareholder specifically revokes
                               such proxy as described herein. See "Proposed
                               Amendment and Proxy Solicitation -- Proxies."
 
Purpose of the Offer.......  Southern is making the Offer because Southern
                               believes that the purchase of Shares is
                               economically attractive to the Company and
                               indirectly to Southern and its shareholders. In
                               addition, the Offer gives Preferred Shareholders
                               the opportunity to sell their Shares at a price
                               which Southern believes to be a premium over the
                               market price and without the usual transaction
                               costs associated with a market sale. See "Purpose
                               of the Offer; Certain Effects of the Offer."
 
Brokerage Commissions......  Not payable by Preferred Shareholders.
 
Solicitation Fee...........  Southern will pay a solicitation fee of an amount
                               equal to 1.50% of the par value per Share for
                               Shares that are tendered, accepted for payment
                               and paid for pursuant to the Offer (except that
                               for transactions for beneficial owners whose
                               ownership equals or exceeds 2,500 Shares,
                               Southern will pay a solicitation fee of an amount
                               equal to 1.00% of the par value per Share). If
                               the Proposed Amendment is approved and adopted,
                               the Company will pay a separate fee of an amount
                               equal to 0.50% of the par value per Share for
                               Shares that are not tendered pursuant to the
                               Offer but which are voted in favor of the
                               Proposed Amendment (except that for transactions
                               for beneficial owners whose ownership equals or
                               exceeds 2,500 Shares, the Company will pay a
                               separate fee of an amount equal to 0.25% of the
                               par value per Share for Shares that are not
                               tendered pursuant to the Offer but are voted in
                               favor of the Proposed Amendment). A Soliciting
                               Dealer (as defined herein) will not be entitled
                               to a solicitation fee or a separate fee for
                               Shares beneficially owned by such Soliciting
                               Dealer. See "Fees and Expenses Paid to Dealers."
 
Proposed Amendment.........  Concurrently with the Offer, the Board of Directors
                               of the Company is soliciting proxies from all
                               holders of each series of the Company's
                               outstanding preferred stock for use at the
                               Special Meeting of Shareholders of the Company.
                               The Special Meeting is being held to consider an
                               amendment to the Company's Charter which would
                               eliminate the provisions restricting the ability
                               of the Company to issue unsecured indebtedness,
                               to sell assets, merge or consolidate and to pay
                               dividends on its common stock in the event that
                               its common equity capitalization falls below
                               certain levels. If the Proposed Amendment is
                               approved by the shareholders, such restrictions
                               contained in the Charter will be eliminated with
                               respect to any Shares that remain
                                        5
<PAGE>   6
 
                               outstanding after the consummation of the Offer.
                               See "Purpose of the Offer; Certain Effects of the
                               Offer."
 
Record Date with respect to
the Shares.................  November 6, 1997.
 
Special Cash Payment.......  Preferred Shareholders who possess the proxy with
                               respect to Shares have the right to vote for the
                               Proposed Amendment regardless of whether they
                               tender their Shares. If the Proposed Amendment is
                               approved and adopted by the Company's
                               shareholders, the Company will make a special
                               cash payment equal to 1.00% of the par value per
                               Share (or $1.00 per Share) for each Share
                               properly voted in favor of the Proposed Amendment
                               but not tendered (the "Special Cash Payment").
                               Preferred Shareholders who validly tender their
                               Shares will not be entitled to the Special Cash
                               Payment. Rather, such tendering Preferred
                               Shareholders will only be entitled to (i) from
                               Southern, the purchase price per Share listed on
                               the front cover of this Offer to Purchase and
                               Proxy Statement and (ii) from the Company, the
                               Interim Dividend.
 
Stock Transfer Tax.........  Except as described herein, Southern will pay or
                               cause to be paid any stock transfer taxes with
                               respect to the sale and transfer of any Shares to
                               it or its order pursuant to the Offer. See
                               Instruction 6 of the applicable Letter of
                               Transmittal and Proxy. See "Terms of the
                               Offer -- Acceptance of Shares for Payment of
                               Purchase Price and Dividends."
 
Payment Date...............  Promptly after the Expiration Date or any extension
                               thereof (the "Payment Date").
 
Dissenters' Rights.........  Preferred Shareholders are entitled to assert
                               dissenters' rights and demand payment for their
                               Shares under Article 13 of the Mississippi
                               Business Corporation Act, which is set forth in
                               its entirety as Appendix B to this Offer to
                               Purchase and Proxy Statement. A Preferred
                               Shareholder who wishes to assert dissenters'
                               rights must not vote his Shares in favor of the
                               Proposed Amendment and, therefore, cannot validly
                               tender Shares pursuant to the Offer or receive
                               the Special Cash Payment. See "Proposed Amendment
                               and Proxy Solicitation -- Rights of Dissenting
                               Shareholders."
 
Further Information........  Additional copies of this Offer to Purchase and
                               Proxy Statement and the applicable Letter of
                               Transmittal and Proxy may be obtained by
                               contacting Corporate Investor Communications,
                               Inc., the Information Agent, at (888) 881-0526
                               (toll free) and (888) 349-2003 (banks and
                               brokers). Questions about the Offer should be
                               directed to Merrill Lynch at (888) ML4-TNDR or
                               (888) 654-8637 (toll free).
                                        6
<PAGE>   7
 
                               TERMS OF THE OFFER
 
NUMBER OF SHARES; PURCHASE PRICES; EXPIRATION DATE; DIVIDENDS
 
     Upon the terms and subject to the conditions described herein and in the
applicable Letter of Transmittal and Proxy, Southern will purchase any and all
Shares that are validly tendered on or prior to the applicable Expiration Date
(and not properly withdrawn in accordance with "Terms of the Offer -- Withdrawal
Rights") at the purchase price per Share listed on the front cover of this Offer
to Purchase and Proxy Statement for the Shares tendered, net to the seller in
cash. In addition, a tendering Preferred Shareholder will receive the Interim
Dividend from the Company. See "Terms of the Offer -- Certain Conditions of the
Offer" and "Terms of the Offer -- Extension of Tender Period; Termination." On
October 31, 1997, there were issued and outstanding 40,000 shares of the 4.40%
Series; 20,099 shares of the 4.60% Series; and 50,000 shares of the 4.72%
Series.
 
     THE OFFER FOR A SERIES OF PREFERRED IS NOT CONDITIONED UPON ANY MINIMUM
NUMBER OF SHARES OF SUCH SERIES OF PREFERRED BEING TENDERED AND IS INDEPENDENT
OF THE OFFER FOR ANY OTHER SERIES OF PREFERRED. THE OFFER, HOWEVER, IS
CONDITIONED UPON, AMONG OTHER THINGS, THE PROPOSED AMENDMENT, AS DESCRIBED
HEREIN, BEING APPROVED AND ADOPTED AT THE SPECIAL MEETING. PREFERRED
SHAREHOLDERS (INCLUDING PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES SUBSEQUENT TO
THE RECORD DATE AND WHO FOLLOW THE REQUIRED PROCEDURES APPLICABLE TO SUCH
SHARES) WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN FAVOR
OF THE PROPOSED AMENDMENT, AS DESCRIBED HEREIN. THE OFFER IS SUBJECT TO CERTAIN
OTHER CONDITIONS. SEE "TERMS OF THE OFFER -- CERTAIN CONDITIONS OF THE OFFER."
 
     The Offer is being sent to all persons in whose names Shares are registered
on the books of the Company as of the close of business on November 6, 1997 and
transferees of such persons. Preferred Shareholders who purchase or whose
purchase is registered after the Record Date and who wish to tender in the Offer
must arrange with their seller to receive a proxy from the holder of record on
the Record Date. In order to facilitate receipt of proxies, Shares traded in the
over-the-counter market only shall, during the period which commences November
4, 1997 (two business days prior to the Record Date) and which will end at the
close of business on the Expiration Date, trade with a proxy providing the
transferee with the right to vote such acquired Shares in the proxy
solicitation. No record date is fixed for determining which persons are
permitted to tender Shares. However, only the holders of record, or holders who
acquire an assignment of proxy from such holders, are permitted to vote for the
Proposed Amendment and thereby validly tender Shares pursuant to the Offer. As
such, any person who is the beneficial owner but not the record holder of the
Shares must (i) arrange for the record transfer of Shares prior to tendering or
(ii) direct such record holder to tender the Shares and vote in favor of the
Proposed Amendment on behalf of such beneficial owner.
 
     With respect to each Series of Preferred, the Expiration Date is the later
of 5:00 p.m., New York City time, on December 10, 1997 or the latest time and
date to which the Offer with respect to such Series of Preferred is extended.
Southern expressly reserves the right, in its sole discretion, and at any time
and/or from time to time, to extend the period of time during which the Offer
for any Series of Preferred is open, by giving oral or written notice of such
extension to the Depositary and making a public announcement thereof, without
extending the period of time during which the Offer for any other Series of
Preferred is open. There is no assurance whatsoever that Southern will exercise
its right to extend the Offer for any Series of Preferred. If Southern decides,
in its sole discretion, to (i) decrease the number of Shares of any Series of
Preferred being sought, (ii) increase or decrease the consideration offered in
the Offer to holders of any Series of Preferred or (iii) increase or decrease
the Soliciting Dealers' fees and, at the time that notice of such increase or
decrease is first published, sent or given to holders of such Series of
Preferred in the manner specified herein, the Offer for such Series of Preferred
is scheduled to expire at any time earlier than the tenth business day from the
date that such notice is first so published, sent or given, such Offer will be
extended until the expiration of such ten-business-day period. For purposes of
the Offer, a "business day" means any day other than a Saturday, Sunday
 
                                        7
<PAGE>   8
 
or federal holiday and consists of the time period from 12:00 midnight through
11:59 p.m., New York City time.
 
     NO ALTERNATIVE, CONDITIONAL OR CONTINGENT TENDERS WILL BE ACCEPTED AND NO
TENDERS WILL BE ACCEPTED IN RESPECT OF SHARES FOR WHICH A VOTE IN FAVOR OF THE
PROPOSED AMENDMENT HAS NOT BEEN CAST AT THE SPECIAL MEETING. SUCH VOTE MAY BE
CAST BY PROPERLY COMPLETING THE FORM OF PROXY THAT IS A PART OF THE APPLICABLE
LETTER OF TRANSMITTAL AND PROXY OR BY VOTING IN PERSON BY BALLOT AT THE SPECIAL
MEETING.
 
     The Company has declared and will pay to tendering Preferred Shareholders
the Interim Dividend on Shares that are purchased by Southern pursuant the
Offer.
 
PROCEDURE FOR TENDERING SHARES
 
     To tender Shares pursuant to the Offer, the tendering owner of Shares must
either:
 
          (a) send to the Depositary (at one of its addresses set forth on the
     back cover of this Offer to Purchase and Proxy Statement) a properly
     completed and duly executed Letter of Transmittal and Proxy (which will
     either deliver such owner's proxy or indicate such owner's intention to
     vote at the Special Meeting in person by ballot), together with any
     required signature guarantees and any other documents required by the
     Letter of Transmittal and Proxy, and either (i) certificates for the Shares
     to be tendered must be received by the Depositary at one of such addresses
     or (ii) such Shares must be delivered pursuant to the procedures for
     book-entry transfer described herein (and a confirmation of such delivery
     must be received by the Depositary), in each case by the Expiration Date;
     or
 
          (b) comply with the guaranteed delivery procedure described under
     "Guaranteed Delivery Procedure" below.
 
     If any of your certificate(s) for Shares have been lost, stolen or
destroyed, please call the Company's shareholder service department ("SCS
Stockholder Services") collect at 404-506-0967. You may need to complete an
Affidavit of Loss with respect to the lost certificate(s) (which will be
provided by SCS Stockholder Services) and payment of an indemnity bond premium
fee may be required.
 
     IN ORDER TO VALIDLY TENDER SHARES PURSUANT TO THE OFFER, PREFERRED
SHAREHOLDERS WHO ACQUIRE SHARES DURING THE PERIOD BEGINNING TWO DAYS PRIOR TO
THE RECORD DATE AND UP TO AND INCLUDING THE EXPIRATION DATE MUST OBTAIN AN
ASSIGNMENT OF PROXY FROM THE SELLER OF SUCH SHARES AND VOTE SUCH PROXY IN FAVOR
OF THE PROPOSED AMENDMENT. IN ORDER TO FACILITATE THE TRANSFER OF SHARES DURING
THE PERIOD DESCRIBED ABOVE, THE SHARES OF EACH SERIES OF PREFERRED WILL TRADE
"WITH PROXY" IN THE OVER-THE-COUNTER MARKET. SETTLEMENT OF ALL TRADES DURING THE
PERIOD DESCRIBED ABOVE SHOULD INCLUDE AN ASSIGNMENT OF PROXY FROM THE SELLER.
 
     The Shares will trade, during the period which begins two days prior to the
Record Date and which will end at the close of business on the Expiration Date,
in the over-the-counter market under the symbols "MPRLT" for the 4.40% Series,
"MPRPT" for the 4.60% Series and "MSPPT" for the 4.72% Series, indicating that
such shares are trading "with proxy." A Preferred Shareholder who acquires
Shares during this period must obtain, or have its authorized representative
obtain, an assignment of proxy (which is included in the applicable Letter of
Transmittal and Proxy) at settlement from the seller. The National Association
of Securities Dealers, Inc. (the "NASD") and The Depository Trust Company
("DTC") have issued notices informing their members and participants that the
Shares will trade "with proxy" and that settlement of all trades during the
period described above should include an assignment of proxy from the seller.
 
     FOR FURTHER INFORMATION, CALL THE INFORMATION AGENT OR THE DEALER MANAGER
OR CONSULT YOUR BROKER FOR ASSISTANCE.
 
                                        8
<PAGE>   9
 
     A tender of Shares made pursuant to any method of delivery set forth herein
or in the Letter of Transmittal and Proxy will constitute a binding agreement
between the tendering holder and Southern upon the terms and subject to the
conditions of the Offer.
 
     The Depositary will establish an account with respect to the Shares at DTC
(the "Book-Entry Transfer Facility") for purposes of the Offer within two
business days after the date of this Offer to Purchase and Proxy Statement, and
any financial institution that is a participant in the system of the Book-Entry
Transfer Facility may make delivery of Shares by causing the Book-Entry Transfer
Facility to transfer such Shares into the Depositary's account in accordance
with the procedures of the Book-Entry Transfer Facility. Although delivery of
Shares may be effected through book-entry transfer, such delivery must be
accompanied by either (i) a properly completed and duly executed Letter of
Transmittal and Proxy, together with any required signature guarantees and any
other required documents, or (ii) an Agent's Message (as hereinafter defined)
and, in any case, must be received by the Depositary at one of its addresses set
forth on the back cover of this Offer to Purchase and Proxy Statement on or
prior to 5:00 p.m., New York City time, on the Expiration Date. DELIVERY OF SUCH
LETTER OF TRANSMITTAL AND PROXY AND ANY OTHER REQUIRED DOCUMENTS TO THE
BOOK-ENTRY TRANSFER FACILITY OR TO SOUTHERN OR THE COMPANY DOES NOT CONSTITUTE
DELIVERY TO THE DEPOSITARY.
 
     The term "Agent's Message" means a message, transmitted by the Book-Entry
Transfer Facility, received by the Depositary and forming a part of the
book-entry transfer when a tender is initiated, which states that the Book-Entry
Transfer Facility has received an express acknowledgment from a participant
tendering Shares that such participant has received and agrees to be bound by
the terms of the Letter of Transmittal and Proxy and that Southern may enforce
such agreement against such participant.
 
     If Shares are registered in the name of a person other than the signatory
on the Letter of Transmittal and Proxy, or if unpurchased Shares are to be
issued to a person other than the registered holder(s), the certificates must be
endorsed or accompanied by appropriate stock powers, in either case signed
exactly as the name or names of the registered holder(s) appear on the Shares
with the signature(s) on the Shares or stock powers guaranteed as stated above.
See Instructions 4, 6 and 7 to the Letter of Transmittal and Proxy. Except as
otherwise provided below, all signatures on a Letter of Transmittal and Proxy
must be guaranteed by a firm that is a member of a registered national
securities exchange or the NASD, or by a commercial bank or trust company having
an office or correspondent in the United States that is a participant in an
approved Signature Guarantee Medallion Program (each of the foregoing being
referred to as an "Eligible Institution"). Signatures on a Letter of Transmittal
and Proxy need not be guaranteed if (a) the Letter of Transmittal and Proxy is
signed by the registered owner of the Shares tendered therewith and such owner
has not completed the box entitled "Special Payment Instructions" or the box
entitled "Special Delivery Instructions" on the Letter of Transmittal and Proxy,
(b) such Shares are tendered for the account of an Eligible Institution or (c)
the Letter of Transmittal and Proxy is being used solely for the purpose of
voting Shares which are not being tendered pursuant to the Offer. See
Instructions 1 and 5 of the Letter of Transmittal and Proxy.
 
     Guaranteed Delivery Procedure.  If a Preferred Shareholder desires to
tender Shares pursuant to the Offer and such Preferred Shareholder's
certificates are not immediately available or the procedures for book-entry
transfer cannot be completed on a timely basis or time will not permit all
required documents to reach the Depositary prior to the Expiration Date, such
Shares may nevertheless be tendered if all of the following guaranteed delivery
procedures are complied with:
 
          (i) such tender is made by or through an Eligible Institution;
 
          (ii) a properly completed and duly executed Notice of Guaranteed
     Delivery and Proxy, substantially in the form provided by Southern and the
     Company herewith, is received (with any required signatures or signature
     guarantees) by the Depositary as provided below on or prior to the
     Expiration Date; and
 
          (iii) the certificates for all tendered Shares in proper form for
     transfer or a Book-Entry Confirmation with respect to all tendered Shares,
     together with a properly completed and duly executed Letter of Transmittal
     and Proxy (or, if applicable, an Agent's Message) and any other documents
     required by the Letter of Transmittal and Proxy, are received by the
     Depositary no later than 5:00 p.m., New York City
 
                                        9
<PAGE>   10
 
     time, within three business days after the date of execution of such Notice
     of Guaranteed Delivery and Proxy.
 
     THE NOTICE OF GUARANTEED DELIVERY AND PROXY MAY BE DELIVERED BY HAND OR
MAILED TO THE DEPOSITARY AND MUST INCLUDE AN ENDORSEMENT BY AN ELIGIBLE
INSTITUTION IN THE FORM SET FORTH IN SUCH NOTICE OF GUARANTEED DELIVERY AND
PROXY.
 
     In all cases, Shares shall not be deemed validly tendered unless a properly
completed and duly executed Letter of Transmittal and Proxy or, if applicable,
an Agent's Message, is received by the Depositary within the applicable time
limits and a vote in favor of the Proposed Amendment in respect of such Shares
has been cast at the Special Meeting either in person or by completion and
execution of the proxy (which proxy must be in the form of proxy that is a part
of the applicable Letter of Transmittal and Proxy).
 
     Notwithstanding any other provision hereof, payment for Shares accepted for
payment pursuant to the Offer in all cases will be made only after timely
receipt by the Depositary of certificates for (or an Agent's Message with
respect to) such Shares, a Letter of Transmittal and Proxy, properly completed
and duly executed, with any required signature guarantees and all other
documents required by the Letter of Transmittal and Proxy.
 
     THE METHOD OF DELIVERY OF SHARES AND ALL OTHER REQUIRED DOCUMENTS IS AT THE
OPTION AND RISK OF THE PREFERRED SHAREHOLDER. IF DELIVERY IS BY MAIL, REGISTERED
MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED, IS RECOMMENDED. BECAUSE IT
IS THE TIME OF RECEIPT, NOT THE TIME OF MAILING, WHICH DETERMINES WHETHER A
TENDER HAS BEEN MADE PRIOR TO THE EXPIRATION DATE, SUFFICIENT TIME SHOULD BE
ALLOWED TO ASSURE TIMELY DELIVERY.
 
     TO AVOID FEDERAL INCOME TAX BACKUP WITHHOLDING EQUAL TO 31% OF THE GROSS
PAYMENTS MADE PURSUANT TO THE OFFER OR, ALTERNATIVELY, THE SPECIAL CASH PAYMENT,
EACH TENDERING PREFERRED SHAREHOLDER AND EACH NON-TENDERING PREFERRED
SHAREHOLDER WHO VOTES FOR THE PROPOSED AMENDMENT MUST NOTIFY THE DEPOSITARY OF
SUCH PREFERRED SHAREHOLDER'S CORRECT TAXPAYER IDENTIFICATION NUMBER AND PROVIDE
CERTAIN OTHER INFORMATION BY PROPERLY COMPLETING AND EXECUTING THE SUBSTITUTE
FORM W-9 INCLUDED IN THE LETTER OF TRANSMITTAL AND PROXY (OR, IN THE CASE OF A
FOREIGN PREFERRED SHAREHOLDER, MUST COMPLETE AND EXECUTE FORM W-8 OBTAINABLE
FROM THE DEPOSITARY). SEE "CERTAIN FEDERAL INCOME TAX CONSEQUENCES -- BACKUP
WITHHOLDING."
 
     EACH PREFERRED SHAREHOLDER IS URGED TO CONSULT WITH HIS OR HER OWN TAX
ADVISOR REGARDING THE TAX CONSEQUENCES OF THE OFFER.
 
     All questions as to the form of documents and the validity, eligibility
(including the time of receipt) and acceptance for payment of any tender of
Shares will be determined by Southern, in its sole discretion, and its
determination will be final and binding. Southern reserves the absolute right to
reject any or all tenders of Shares that (i) it determines are not in proper
form or (ii) the acceptance for payment of or payment for which may, in the
opinion of Southern's counsel, be unlawful. Southern also reserves the absolute
right to waive any defect or irregularity in any tender of Shares. None of
Southern, the Company, the Dealer Manager, the Depositary, the Information Agent
or any other person will be under any duty to give notice of any defect or
irregularity in tenders, nor shall any of them incur any liability for failure
to give any such notice.
 
WITHDRAWAL RIGHTS
 
     ANY SHARES FOR WHICH A VOTE IN FAVOR OF THE PROPOSED AMENDMENT WAS NOT
VALIDLY CAST AT THE SPECIAL MEETING WILL BE DEEMED WITHDRAWN AND NOT VALIDLY
TENDERED BY THE RESPECTIVE PREFERRED SHAREHOLDER.
 
                                       10
<PAGE>   11
 
     Tenders of Shares made pursuant to the Offer may be withdrawn at any time
prior to the Expiration Date. Thereafter, such tenders are irrevocable, except
that they may be withdrawn after January 2, 1998, unless previously accepted for
payment as provided in this Offer to Purchase and Proxy Statement.
 
     The proxy accompanying any tendered Shares that are withdrawn will not be
considered revoked unless the Preferred Shareholder specifically revokes such
proxy as described herein. See "Proposed Amendment and Proxy
Solicitation -- Proxies."
 
     To be effective, a written notice of withdrawal must be timely received by
the Depositary, at one of its addresses set forth on the back cover of this
Offer to Purchase and Proxy Statement, and must specify the name of the person
who tendered the Shares to be withdrawn and the number of Shares to be
withdrawn. If the Shares to be withdrawn have been delivered to the Depositary,
a signed notice of withdrawal with signatures guaranteed by an Eligible
Institution (except in the case of Shares tendered by an Eligible Institution)
must be submitted prior to the release of such Shares. In addition, such notice
must specify, in the case of Shares tendered by delivery of certificates, the
name of the registered owner (if different from that of the Preferred
Shareholder who tenders) and the serial numbers shown on the particular
certificates evidencing the Shares to be withdrawn or, in the case of Shares
tendered by book-entry transfer, the name and number of the account at the
Book-Entry Transfer Facility to be credited with the withdrawn Shares and the
name of the registered holder (if different from the name of such account).
Withdrawals may not be rescinded, and Shares withdrawn will thereafter be deemed
not validly tendered for purposes of the Offer. However, withdrawn Shares may be
re-tendered by again following one of the procedures described in "Terms of the
Offer -- Procedure for Tendering Shares" at any time prior to the Expiration
Date.
 
     All questions as to the form and validity (including time of receipt) of
any notice of withdrawal will be determined by Southern, in its sole discretion,
and its determination will be final and binding. None of Southern, the Company,
the Dealer Manager, the Depositary, the Information Agent or any other person
will be under any duty to give notification of any defect or irregularity in any
notice of withdrawal or will incur any liability for failure to give any such
notification.
 
ACCEPTANCE OF SHARES FOR PAYMENT AND PAYMENT OF PURCHASE PRICE AND DIVIDENDS
 
     Upon the terms and subject to the conditions of the Offer, and as promptly
as practicable after the Expiration Date, Southern will accept for payment (and
thereby purchase) and pay for Shares validly tendered and not withdrawn as
permitted in "Terms of the Offer -- Withdrawal Rights." Thereafter, payment for
all Shares validly tendered on or prior to the Expiration Date and accepted
pursuant to the Offer will be made by the Depositary by check as promptly as
practicable after the Expiration Date. In all cases, payment for Shares accepted
for payment pursuant to the Offer will be made promptly but only after timely
receipt by the Depositary of certificates for such Shares (or of an Agent's
Message), a properly completed and duly executed Letter of Transmittal and Proxy
and any other required documents.
 
     For purposes of the Offer, Southern will be deemed to have accepted for
payment (and thereby purchased) Shares that are validly tendered and not
withdrawn as, if and when it gives oral or written notice to the Depositary of
its acceptance for payment of such Shares. Southern will pay for Shares that it
has purchased pursuant to the Offer by depositing the purchase price therefor
with the Depositary, which will act as agent for Preferred Shareholders who
tender for the purpose of receiving payment from Southern and transmitting
payment to Preferred Shareholders who tender. In addition, the Company will pay
the Interim Dividend on Shares validly tendered and purchased by Southern
pursuant to the Offer by depositing the Interim Dividend amount with the
Depositary, which will act as agent for Preferred Shareholders who tender for
the purpose of receiving payment from the Company and transmitting payment to
Preferred Shareholders who tender. Under no circumstances will interest be paid
on amounts to be paid by either the Company or Southern to tendering Preferred
Shareholders, regardless of any delay in making such payment. Certificates for
all Shares not validly tendered will be returned or, in the case of Shares
tendered by book-entry transfer, such Shares will be credited to an account
maintained with the Book-Entry Transfer Facility, as promptly as practicable,
without expense to the Preferred Shareholder who tenders.
 
                                       11
<PAGE>   12
 
     If certain events occur, Southern may not be obligated to purchase Shares
pursuant to the Offer. See "Terms of the Offer -- Certain Conditions of the
Offer."
 
     Southern will pay or cause to be paid any stock transfer taxes with respect
to the sale and transfer of any Shares to it or its order pursuant to the Offer.
If, however, payment of the purchase price is to be made to, or Shares not
tendered or not purchased are to be registered in the name of, any person other
than the registered owner, or if tendered Shares are registered in the name of
any person other than the person signing the Letter of Transmittal and Proxy,
the amount of any stock transfer taxes (whether imposed on the registered owner,
such other person or otherwise) payable on account of the transfer to such
person will be deducted from the purchase price unless satisfactory evidence of
the payment of such taxes, or exemption therefrom, is submitted. See Instruction
6 of the accompanying Letter of Transmittal and Proxy.
 
CERTAIN CONDITIONS OF THE OFFER
 
     SOUTHERN WILL NOT BE REQUIRED TO ACCEPT FOR PAYMENT OR PAY FOR ANY SHARES
TENDERED IF THE PROPOSED AMENDMENT IS NOT APPROVED AND ADOPTED AT THE SPECIAL
MEETING.
 
     IN ORDER TO TENDER THEIR SHARES, PREFERRED SHAREHOLDERS (INCLUDING
PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES SUBSEQUENT TO THE RECORD DATE AND WHO
FOLLOW THE REQUIRED PROCEDURES APPLICABLE TO SUCH SHARES) MUST SUBMIT A DULY
COMPLETED, VALID AND UNREVOKED PROXY INDICATING THEIR VOTE IN FAVOR OF THE
PROPOSED AMENDMENT OR INDICATE IN THE ACCOMPANYING LETTER OF TRANSMITTAL AND
PROXY THEIR INTENTION TO VOTE FOR THE PROPOSED AMENDMENT AT THE SPECIAL MEETING.
PREFERRED SHAREHOLDERS WHO POSSESS THE PROXY WITH RESPECT TO SUCH SHARES HAVE
THE RIGHT TO VOTE FOR THE PROPOSED AMENDMENT REGARDLESS OF WHETHER THEY TENDER
THEIR SHARES. ANY SHARES FOR WHICH A VOTE IN FAVOR OF THE PROPOSED AMENDMENT WAS
NOT VALIDLY CAST AT THE SPECIAL MEETING WILL BE DEEMED WITHDRAWN AND NOT VALIDLY
TENDERED BY THE RESPECTIVE PREFERRED SHAREHOLDER. PREFERRED SHAREHOLDERS WHO
TENDER THEIR SHARES WILL NOT BE ENTITLED TO THE SPECIAL CASH PAYMENT. RATHER,
PREFERRED SHAREHOLDERS WHO TENDER THEIR SHARES WILL BE ENTITLED TO ONLY (I) FROM
SOUTHERN, THE PURCHASE PRICE PER SHARE LISTED ON THE FRONT COVER OF THIS OFFER
TO PURCHASE AND PROXY STATEMENT AND (II) FROM THE COMPANY, THE INTERIM DIVIDEND.
 
     In addition, notwithstanding any other provision of the Offer, Southern
will not be required to accept for payment or pay for any Shares tendered, and
may terminate or amend the Offer (by oral or written notice to the Depositary
and timely public announcement) or may postpone (subject to the requirements of
the Securities Exchange Act of 1934, as amended (the "Exchange Act") for prompt
payment for or return of Shares) the acceptance for payment of, or payment for,
Shares tendered, if at any time on or after November 3, 1997, and at or before
the Expiration Date, any of the following shall have occurred (which shall not
have been waived by Southern):
 
          (a) there shall have been threatened, instituted or pending any action
     or proceeding by any government or governmental, regulatory or
     administrative agency, authority or tribunal or any other person, domestic
     or foreign, or before any court, authority, agency or tribunal that (i)
     challenges the acquisition of Shares pursuant to the Offer or otherwise in
     any manner relates to or affects the Offer or (ii) in the reasonable
     judgment of Southern, would or might materially and adversely affect the
     business, condition (financial or otherwise), income, operations or
     prospects of Southern and its subsidiaries taken as a whole, or otherwise
     materially impair in any way the contemplated future conduct of the
     business of Southern or any of its subsidiaries or materially impair the
     Offer's contemplated benefits to Southern or the Company;
 
          (b) there shall have been any action threatened, pending or taken, or
     approval withheld, or any statute, rule, regulation, judgment, order or
     injunction threatened, proposed, sought, promulgated,
 
                                       12
<PAGE>   13
 
     enacted, entered, amended, enforced or deemed to be applicable to the Offer
     or Southern or any of its subsidiaries, by any legislative body, court,
     authority, agency or tribunal that, in Southern's reasonable judgment,
     would or might directly or indirectly (i) make the acceptance for payment
     of, or payment for, some or all of the Shares illegal or otherwise restrict
     or prohibit consummation of the Offer; (ii) delay or restrict the ability
     of Southern, or render Southern unable, to accept for payment or pay for
     some or all of the Shares; (iii) materially impair the contemplated
     benefits of the Offer to Southern or the Company (including materially
     increasing the effective interest cost of certain types of unsecured debt);
     or (iv) materially affect the business, condition (financial or otherwise),
     income, operations or prospects of Southern and its subsidiaries taken as a
     whole, or otherwise materially impair in any way the contemplated future
     conduct of the business of Southern or any of its subsidiaries;
 
          (c) there shall have occurred (i) any significant decrease in the
     market price of the Shares; (ii) any change in the general political,
     market, economic or financial conditions in the United States or abroad
     that, in the reasonable judgment of Southern, would or might have a
     material adverse effect on Southern's business, operations, prospects or
     ability to obtain financing generally or the trading in the Shares or other
     equity securities of the Company or Southern; (iii) the declaration of a
     banking moratorium or any suspension of payments in respect of banks in the
     United States or any limitation on, or any event that, in Southern's
     reasonable judgment, would or might affect the extension of credit by
     lending institutions in the United States; (iv) the commencement of war,
     armed hostilities or other international or national calamity directly or
     indirectly involving the United States; (v) any general suspension of
     trading in, or limitation on prices for, securities on any national
     securities exchange or in the over-the-counter market; (vi) in the case of
     any of the foregoing existing at the time of the commencement of the Offer,
     in Southern's reasonable judgment, a material acceleration or worsening
     thereof; (vii) any decline in either the Dow Jones Industrial Average or
     the Standard and Poor's Composite 500 Stock Index by an amount in excess of
     15% measured from the close of business on October 31, 1997; or (viii) a
     decline in the ratings accorded any of Southern's or the Company's
     securities by Standard & Poor's Rating Services ("S&P"), Moody's Investors
     Service, Inc. ("Moody's") or Duff & Phelps, Inc. ("D&P") or that S&P,
     Moody's or D&P has announced that it has placed any such rating under
     surveillance or review with negative implications;
 
          (d) any tender or exchange offer with respect to some or all of the
     outstanding preferred stock of the Company (other than the Offer) or other
     equity securities of the Company or Southern, or a merger, acquisition or
     other business combination proposal for Southern, shall have been proposed,
     announced or made by any person or entity;
 
          (e) there shall have occurred any event or events that have resulted,
     or in Southern's reasonable judgment may result, in an actual or threatened
     change in the business, condition (financial or otherwise), income,
     operations, stock ownership or prospects of Southern and its subsidiaries;
 
          (f) the Commission shall have withheld approval, under the Holding
     Company Act, of the acquisition of the Shares by Southern pursuant to the
     Offer or the approval and adoption of the Proposed Amendment at the Special
     Meeting; or
 
          (g) the holders of more than $5,000,000 in aggregate par value of the
     Company's preferred stock that is not included in the Offer shall have
     perfected dissenters' rights under Mississippi law (see "Proposed Amendment
     and Proxy Solicitation -- Rights of Dissenting Shareholders");
 
and, in the sole judgment of Southern, such event or events make it undesirable
or inadvisable to proceed with the Offer or with such acceptance for payment or
payment. With respect to the approval of the Commission referenced in clause (f)
above, the Commission must find that the acquisition of the Shares by Southern
is not detrimental to the public interest or the interests of investors or
consumers, and that the consideration paid in connection with the acquisition
and the adoption of the Proposed Amendment, including fees, commissions and
other remuneration, is reasonable.
 
     The foregoing conditions (including the condition that the Proposed
Amendment be approved and adopted at the Special Meeting) are for the sole
benefit of Southern and may be asserted by Southern regardless of the
circumstances (including any action or inaction by Southern) giving rise to any
such condition, and any such condition may be waived by Southern, in whole or in
part, at any time and from time
 
                                       13
<PAGE>   14
 
to time in its sole discretion. A decision by Southern to terminate or otherwise
amend any Offer, following the occurrence of any of the foregoing, with respect
to one Series of Preferred will not create an obligation on behalf of Southern
to terminate or otherwise amend in a similar manner the Offer with respect to
any other Series of Preferred. The failure by Southern at any time to exercise
any of the foregoing rights shall not be deemed a waiver of any such right and
each such right shall be deemed an ongoing right which may be asserted at any
time and from time to time. Any determination by Southern concerning the events
described above will be final and binding on all parties.
 
EXTENSION OF TENDER PERIOD; TERMINATION; AMENDMENTS
 
     Southern expressly reserves the right, in its sole discretion, and at any
time and/or from time to time prior to the Expiration Date, to extend the period
of time during which the Offer for any Series of Preferred is open by giving
oral or written notice of such extension to the Depositary, without extending
the period of time during which the Offer for any other Series of Preferred is
open. There can be no assurance, however, that Southern will exercise its right
to extend the Offer for any Series of Preferred. During any such extension, all
Shares of the subject Series of Preferred previously tendered will remain
subject to the Offer, except to the extent that such Shares may be withdrawn as
set forth in "Terms of the Offer -- Withdrawal Rights."
 
     Southern also expressly reserves the right, in its sole discretion, to,
among other things, terminate the Offer and not accept for payment or pay for
any Shares tendered, subject to Rule 13e-4(f)(5) under the Exchange Act, which
requires Southern either to pay the consideration offered or to return the
Shares tendered promptly after the termination or withdrawal of the Offer upon
the occurrence of any of the conditions specified in "Terms of the
Offer -- Certain Conditions of the Offer" by giving oral or written notice of
such termination to the Depositary, and making a public announcement thereof.
 
     Subject to compliance with applicable law, Southern further reserves the
right, in its sole discretion, to amend the Offer in any respect. Amendments to
the Offer may be made at any time and/or from time to time effected by public
announcement thereof, such announcement, in the case of an extension, to be
issued no later than 9:00 a.m., New York City time, on the next business day
after the previously scheduled Expiration Date. Any public announcement made
pursuant to the Offer will be disseminated promptly to Preferred Shareholders
affected thereby in a manner reasonably designed to inform such Preferred
Shareholders of such change. Without limiting the manner in which Southern may
choose to make a public announcement, except as required by applicable law,
Southern shall have no obligation to publish, advertise or otherwise communicate
any such public announcement other than by making a release to the Dow Jones
News Service.
 
     If Southern materially changes the terms of the Offer or the information
concerning the Offer, or if it waives a material condition of the Offer,
Southern will extend the Offer to the extent required by Rules 13e-4(d)(2) and
13e-4(e)(2) under the Exchange Act. Those rules require that the minimum period
during which the Offer must remain open following material changes in the terms
of the Offer or information concerning the Offer (other than a change in price,
a change in percentage of securities sought or a change in the dealer's
solicitation fee) will depend on the facts and circumstances, including the
relative materiality of such terms or information. The Commission has stated
that, in its view, an offer should remain open for a minimum of five business
days from the date that a notice of such a material change is first published,
sent or given. If the Offer is scheduled to expire at any time earlier than the
expiration of a period ending on the tenth business day from, and including, the
date that Southern publishes, sends or gives to Preferred Shareholders a notice
that it will (i) increase or decrease the price it will pay for Shares, (ii)
decrease the percentage of Shares it seeks, or (iii) increase or decrease the
soliciting dealers' fees, the Offer will be extended until the expiration of
such period of ten business days.
 
     THE OFFER FOR EACH SERIES OF PREFERRED IS INDEPENDENT OF THE OFFER FOR ANY
OTHER SERIES OF PREFERRED. IF SOUTHERN EXTENDS OR AMENDS ANY OFFER WITH RESPECT
TO ONE SERIES OF PREFERRED FOR ANY REASON, SOUTHERN WILL HAVE NO OBLIGATION TO
EXTEND OR AMEND THE OFFER FOR ANY OTHER SERIES OF PREFERRED.
 
                                       14
<PAGE>   15
 
                   PROPOSED AMENDMENT AND PROXY SOLICITATION
 
INTRODUCTION
 
     This Offer to Purchase and Proxy Statement is first being mailed on or
about November 3, 1997 to the Preferred Shareholders of the Company in
connection with the solicitation of proxies by the Board of Directors of the
Company (the "Board") for use at the Special Meeting. A separate Proxy Statement
is being mailed to the holders of each series of the Company's preferred stock
that is not included in the Offer.
 
     Preferred Shareholders who wish to tender their Shares pursuant to the
Offer must vote in favor of the Proposed Amendment in person by ballot or by
proxy at the Special Meeting. Only holders of record of the Company's voting
securities at the close of business on the Record Date or persons obtaining a
proxy from the holders of record on the Record Date will be entitled to vote in
person or by proxy at the Special Meeting. If the Proposed Amendment is approved
and adopted by the Company's shareholders, the Company will make a special cash
payment in the amount equal to 1.00% of the par value per Share (or $1.00 per
Share) for each Share properly voted in favor of the Proposed Amendment (the
"Special Cash Payment"); provided that such Shares have not been tendered
pursuant to the Offer. If a Preferred Shareholder votes against the Proposed
Amendment or abstains, such Preferred Shareholder shall not be entitled to the
Special Cash Payment (regardless of whether the Proposed Amendment is approved
and adopted). Those Preferred Shareholders who validly tender their Shares will
be entitled to only (i) from Southern, the purchase price per Share listed on
the front cover of this Offer to Purchase and Proxy Statement and (ii) from the
Company, the Interim Dividend. Preferred Shareholders who validly tender their
Shares will not be entitled to the Special Cash Payment.
 
VOTING SHARES
 
     With respect to the Company's preferred stock, par value $100 per share,
November 6, 1997 and, with respect to the Company's depositary preferred stock
(each representing one-fourth of a share of Preferred Stock), November 7, 1997
(collectively, the "Record Date") have been fixed as the respective record dates
for the determination of shareholders entitled to notice of and to vote at the
Special Meeting.
 
     The Company's Charter authorizes the issuance of 1,130,000 shares of common
stock, without par value, of which 1,121,000 shares are outstanding. All of such
shares are owned by Southern.
 
     The Company's Charter also authorizes the issuance of 544,139 shares of
preferred stock, par value $100 per share. The Company has also issued shares of
depositary preferred stock, each representing one-fourth of a share of preferred
stock, par value $100 per share. There are 160,099 shares of the preferred stock
and 936,160 shares of depositary preferred stock outstanding on the Record Date.
Such shares are publicly held and are divided into four separate classes of
preferred stock and two separate classes of depositary preferred stock. Such
classes constitute individual series of preferred stock and depositary preferred
stock, respectively, and vary from each other with respect to dividend rates,
redemption prices and amounts payable on liquidation. All outstanding shares of
the Company's preferred stock are entitled to vote on the Proposed Amendment as
a single class, each share of preferred stock being counted as one, and each
share of depositary preferred stock being counted as one-quarter.
 
VOTING REQUIREMENTS AND PROCEDURES
 
     Adoption of the Proposed Amendment requires the affirmative vote of the
holders of (i) at least a majority of the shares of the capital stock of the
Company then outstanding and entitled to vote (i.e., the common stock) and (ii)
at least two-thirds of the total voting power of the Company's preferred stock
outstanding (counting shares as described above). Abstentions and broker
non-votes will have the effect of votes against the Proposed Amendment.
SOUTHERN, THE OWNER OF ALL OF THE OUTSTANDING SHARES OF COMMON STOCK OF THE
COMPANY, HAS ADVISED THE COMPANY THAT IT INTENDS TO VOTE ALL OF THE OUTSTANDING
SHARES OF COMMON STOCK OF THE COMPANY IN FAVOR OF THE PROPOSED AMENDMENT.
 
                                       15
<PAGE>   16
 
     Votes at the Special Meeting will be tabulated preliminarily by the
Depositary and the Information Agent. Inspectors of Election, duly appointed by
the presiding officer of the Special Meeting, will definitively count and
tabulate the votes and determine and announce the results at the Special
Meeting. The Company has no established procedure for confidential voting.
 
PROXIES
 
     THE ENCLOSED PROXY, WHICH IS CONTAINED WITHIN THE LETTER OF TRANSMITTAL AND
PROXY (AND THE NOTICE OF GUARANTEED DELIVERY AND PROXY), IS SOLICITED BY THE
COMPANY'S BOARD, WHICH RECOMMENDS VOTING FOR THE PROPOSED AMENDMENT. ALL SHARES
OF THE COMPANY'S COMMON STOCK WILL BE VOTED IN FAVOR OF THE PROPOSED AMENDMENT.
Preferred Shareholders tendering their Shares pursuant to the Offer and voting
at the Special Meeting by proxy must use the proxy that is a part of the
applicable Letter of Transmittal and Proxy. Shares of the Company's outstanding
preferred stock represented by properly executed proxies received at or prior to
the Special Meeting will be voted in accordance with the instructions thereon.
If no instructions are indicated, duly executed proxies will be voted in
accordance with the recommendation of the Board. It is not anticipated that any
other matters will be brought before the Special Meeting. However, the enclosed
proxy gives discretionary authority to the proxy holders named therein should
any other matters be presented at the Special Meeting, and it is the intention
of the proxy holders to act on any other matters in their discretion.
 
     Execution of a proxy will not prevent a shareholder from attending the
Special Meeting and voting in person. Any shareholder giving a proxy may revoke
it at any time before it is voted by delivering to the Secretary of the Company
written notice of revocation bearing a later date than the proxy, by delivering
a duly executed proxy bearing a later date, or by voting in person by ballot at
the Special Meeting. Withdrawal of Shares tendered pursuant to the Offer will
not revoke a properly executed proxy.
 
     The Company will bear the cost of the solicitation of proxies by the Board.
The Company has engaged Corporate Investor Communications, Inc. to act as
Information Agent in connection with the solicitation of proxies for a fee of
$2,000, plus unit fees per preferred shareholder contacted, plus reimbursement
of reasonable out-of-pocket expenses. Proxies will be solicited by mail or by
telephone. In addition, officers and employees of the Company and its affiliates
may also solicit proxies personally or by telephone; such persons will receive
no additional compensation for these services. The Information Agent has not
been retained to make, and will not make, solicitations or recommendations,
other than conveying information related to the recommendations of the Board, in
connection with the Proposed Amendment.
 
     The Company has requested that brokerage houses and other custodians,
nominees and fiduciaries forward solicitation materials to the beneficial owners
of shares of the Company's outstanding preferred stock held of record by such
persons and will reimburse such brokers and other fiduciaries for their
reasonable out-of-pocket expenses incurred in connection therewith.
 
     The solicitation of proxies has been approved by the Commission under the
Holding Company Act. An application has been filed with the Commission under the
Holding Company Act requesting approval of the Proposed Amendment and the
acquisition of the Shares by Southern pursuant to the Offer.
 
SPECIAL CASH PAYMENTS
 
     Subject to the terms and conditions set forth in this Offer to Purchase and
Proxy Statement, if (but only if) the Proposed Amendment is approved and adopted
by the shareholders of the Company, the Company will make a Special Cash Payment
to each Preferred Shareholder who voted in favor of the Proposed Amendment, in
person by ballot or by proxy, at the Special Meeting in the amount equal to
1.00% of the par value per Share (or $1.00 per Share) for each Share held by
such Preferred Shareholder which is so voted, provided that such Shares have not
been tendered pursuant to the Offer. The Company has been advised that there is
no controlling precedent under state law as to the permissibility of its making
the Special Cash Payment. Although, as a result, there can be no assurance as to
how a court would rule on the issue, the Company believes that the Offer is fair
to Preferred Shareholders and has determined to make the Special Cash Payment.
SPECIAL CASH PAYMENTS WILL BE MADE TO PREFERRED SHAREHOLDERS (IF SUCH SHARES
HAVE NOT BEEN TENDERED PURSUANT TO THE OFFER) ONLY IN RESPECT OF EACH SHARE
WHICH IS VOTED FOR THE ADOPTION OF THE PROPOSED
 
                                       16
<PAGE>   17
 
AMENDMENT; PROVIDED, HOWEVER, THAT THOSE PREFERRED SHAREHOLDERS WHO VALIDLY
TENDER THEIR SHARES WILL NOT BE ENTITLED TO THE SPECIAL CASH PAYMENT. Rather,
those Preferred Shareholders who validly tender their Shares will be entitled to
only (i) from Southern, the purchase price per Share listed on the front cover
of this Offer to Purchase and Proxy Statement and (ii) from the Company, the
Interim Dividend. If the Proposed Amendment is approved and adopted, Special
Cash Payments will be paid out of the Company's general funds, promptly after
the Proposed Amendment shall have become effective. However, no accrued interest
will be paid on the Special Cash Payments regardless of any delay in making such
payments.
 
     Only holders of record of the Company's voting securities at the close of
business on the Record Date or persons obtaining a proxy from the holders of
record on the Record Date will be entitled to vote in person or by proxy at the
Special Meeting. Any beneficial holder of Shares who is not the registered
holder of such Shares as of the Record Date (as would be the case for any
beneficial holder whose Shares are registered in the name of such holder's
broker, dealer, commercial bank, trust company or other nominee) must arrange
with the record Preferred Shareholder to execute and deliver a proxy form on
such beneficial owner's behalf. If a beneficial holder of Shares intends to
attend the Special Meeting and vote in person, such beneficial holder must
obtain a legal proxy form from his or her broker, dealer, commercial bank, trust
company or other nominee.
 
SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
     As noted above, Southern owns all the outstanding common stock of the
Company.
 
     Pursuant to Section 13(d) of the Exchange Act, a beneficial owner of a
security is any person who directly or indirectly has or shares voting or
investment power over such security. No person or group is known by management
of the Company to be the beneficial owner of more than 5% of the shares of the
Company's preferred stock as of October 30, 1997.
 
     Officers and directors of the Company as a group owned, as of October 30,
1997, less than 1% of the total number of shares of the Company's preferred
stock and of the common stock of Southern.
 
BUSINESS TO COME BEFORE THE SPECIAL MEETING
 
     The following Proposed Amendment to the Charter is the only item of
business expected to be presented at the Special Meeting:
 
     To remove in their entirety (i) Subparagraph (F)(b) of Paragraph FOURTH
under "General Provisions" of the "Preferred Stock" section of the Charter, a
provision restricting the amount of securities representing unsecured
indebtedness issuable by the Company, (ii) Subparagraph (F)(a) of Paragraph
FOURTH under "General Provisions" of the "Preferred Stock" section of the
Charter, a provision which requires the vote of the holders of at least a
majority of the total voting power of the Company's outstanding preferred stock
to approve the sale of all or substantially all of the Company's property and
mergers or consolidations that have not been approved under the Holding Company
Act, and (iii) Subparagraph (B) (except for the first paragraph therein) of
Paragraph FOURTH under "General Provisions" of the "Preferred Stock" section of
the Charter, a provision restricting the ability of the Company to pay dividends
on its common stock in the event that its common equity capitalization falls
below certain levels.
 
     THE FOLLOWING STATEMENTS ARE SUMMARIES OF THE SUBSTANCE OR GENERAL EFFECT
OF PROVISIONS OF THE CHARTER, AND ARE QUALIFIED IN THEIR ENTIRETY BY THE CHARTER
AND SUBPARAGRAPHS (B), (F)(A) AND (F)(B) OF PARAGRAPH FOURTH UNDER "GENERAL
PROVISIONS" OF THE "PREFERRED STOCK" SECTION THEREIN (AS DESCRIBED BELOW). SEE
APPENDIX A HERETO FOR THE TEXT OF THE PROVISIONS TO BE DELETED.
 
                                       17
<PAGE>   18
 
EXPLANATION OF THE PROPOSED AMENDMENT
 
     Subparagraph (F)(b) of Paragraph FOURTH under "General Provisions" of the
"Preferred Stock" section of the Charter currently provides that, so long as any
shares of the Company's preferred stock are outstanding, without the affirmative
vote of the holders of at least a majority of the total voting power of its
outstanding shares of preferred stock, the Company shall not issue or assume any
securities representing unsecured debt (other than for the purpose of refunding
or renewing outstanding unsecured securities issued by the Company resulting in
equal or longer maturities or redeeming or otherwise retiring all outstanding
shares of its preferred stock or of any senior or equally ranking stock) if,
immediately after such issue or assumption, (a) the total outstanding principal
amount of all securities representing unsecured debt of the Company would exceed
20% of the aggregate of all existing secured debt of the Company and the capital
stock, premiums thereon and surplus of the Company as stated on the Company's
books; or (b) the total outstanding principal amount of all securities
representing unsecured debt of the Company of maturities of less than ten years
would exceed 10% of such aggregate (the "Debt Limitation Provision").
 
     Subparagraph (F)(a) of Paragraph FOURTH under "General Provisions" of the
"Preferred Stock" section of the Charter currently provides that, so long as any
shares of the Company's preferred stock are outstanding, without the affirmative
vote of the holders of at least a majority of the total voting power of its
outstanding shares of preferred stock, the Company shall not dispose of all or
substantially all of its property or merge or consolidate, unless such action
has been approved by the Commission under the Holding Company Act (the "Merger
Provision").
 
     Subparagraph (B) (except the first paragraph therein) of Paragraph FOURTH
under "General Provisions" of the "Preferred Stock" section of the Charter
currently provides that, so long as any shares of the Company's preferred stock
are outstanding, the Company's payment of dividends on its common stock is
limited to 50% of net income available for such stock during a period of 12
months if, calculated on a corporate basis, the ratio of its common stock equity
to total capitalization, including surplus, adjusted to reflect the payment of
the proposed dividend, is below 20%, and to 75% of such net income if such ratio
is 20% or more but less than 25% (the "Common Stock Dividend Provision").
 
     The Proposed Amendment, if adopted, would eliminate from the Charter in
their entirety the Debt Limitation Provision, the Merger Provision and the
Common Stock Dividend Provision (collectively, the "Restriction Provisions"),
each as set forth in full in Appendix A hereto.
 
REASONS FOR THE PROPOSED AMENDMENT
 
     The electric utility industry has become, and will continue to be,
increasingly competitive as the result of various factors, including regulatory
and technological developments. Various federal and state regulatory initiatives
designed to promote wholesale and retail competition include, among other
things, proposals that would allow customers to choose their electricity
provider. As these competitive initiatives materialize, the structure of the
utility industry could radically change. The Company believes that maintaining
and improving its position as a low-cost producer and having the flexibility to
respond to developments in the industry will be crucial to its success in the
new competitive marketplace.
 
     The Company believes that adoption of the Proposed Amendment is important
to creating the necessary flexibility to respond to any industry developments.
 
     The restrictions that would be eliminated by the Proposed Amendment
generally do not burden the industry's new competitors (power marketers,
independent power producers, exempt wholesale generators and owners of
cogeneration facilities), nor even other public utility companies. These
restrictions stem from the fact that the Company and its affiliates are subject
to regulation under the Holding Company Act. Such restrictions were initially
imposed as a result of the Commission's 1956 Statement of Policy Regarding
Preferred Stock Subject to the Public Utility Holding Company Act of 1935. The
Commission recently has noted that the Statement of Policy is out of date and
has not kept pace with the rapidly changing securities markets. Furthermore, the
Commission stated that the marketplace should more appropriately determine the
terms and conditions applicable to securities issuances.
 
                                       18
<PAGE>   19
 
     Management considers that elimination of the Debt Limitation Provision is
crucial to the Company's financial flexibility and its ability to effect future
capital cost reductions. The deletion of this provision from the Charter will
allow the Company to utilize more fully various unsecured debt alternatives and
thus improve its ability to take full advantage of changing conditions in the
capital markets. The additional flexibility will, for example, permit the
Company to issue long-term debt when, because of mortgage coverage restrictions
or other reasons, it may be unattractive or not possible to issue any additional
first mortgage bonds. In addition, elimination of the Debt Limitation Provision
will afford the Company greater flexibility in the issuance of short-term debt
to meet seasonal cash requirements with what is usually the least expensive form
of capital.
 
     The Company believes that the Merger Provision is an unnecessary
restriction on the ability of the Company to consider strategic responses to the
increasingly competitive utility industry. For instance, the Merger Provision
provides that, unless approved under the Holding Company Act, the sale or lease
of certain of the Company's properties would require Preferred Shareholder
approval in addition to any statutory requirement under state law. Such an
additional burden could hinder the Company's ability to conduct its business
operations in this changing utility environment. Furthermore, the elimination of
the Merger Provision will not affect voting rights of stockholders under
applicable state law.
 
     Similarly, the Common Stock Dividend Restriction unnecessarily impedes the
financial flexibility of the Company and Southern. The Common Stock Dividend
Restriction prevents the Company from paying dividends on its common stock
unless the Company maintains a certain equity capitalization. This restriction
(a vestige of the 1956 Statement of Policy) is in addition to (i) the statutory
requirements on the Company's ability to pay dividends on its common stock that
arise under state law and (ii) other provisions of the Company's Charter, which
provide that the Company may not pay dividends unless it is current in the
payment of dividends on its preferred stock. Due to continued applicability of
these restrictions, the Company views the Common Stock Dividend Restriction as
an unduly burdensome and unnecessary provision which could restrict the ability
of the Company and Southern to participate in today's capital markets.
 
RIGHTS OF DISSENTING SHAREHOLDERS
 
     The following is a summary of dissenters' rights available to Preferred
Shareholders of the Company, which summary is necessarily incomplete and
selective and is qualified in its entirety by reference to Article 13 of the
Mississippi Business Corporation Act, set forth in its entirety as Appendix B.
 
     Procedure for Exercise of Dissenters' Rights.  A Preferred Shareholder who
wishes to assert dissenters' rights must deliver to the Company, before the vote
is taken at the Special Meeting, a written notice of his or her intent to demand
payment for his or her Shares if the Proposed Amendment is effectuated, and must
not vote his or her Shares in favor of the Proposed Amendment. A Preferred
Shareholder who does not satisfy the foregoing notice requirement will not be
entitled to payment for his or her Shares under the Mississippi dissenters'
rights law. Because a Preferred Shareholder who wishes to assert dissenters'
rights must not vote in favor of the Proposed Amendment, such holder cannot
validly tender Shares pursuant to the Offer or receive the Special Cash Payment.
 
     If the Proposed Amendment is authorized at the Special Meeting, the Company
will deliver a written dissenters' notice to all Preferred Shareholders who
satisfied the above notice requirement. The notice to dissenters must be sent no
later than ten days after the Proposed Amendment is effective and must: (1)
state where the payment demand must be sent and where and when certificates for
certificated Shares must be deposited; (2) inform holders of uncertificated
Shares to what extent transfer of the Shares will be restricted after the
payment demand is received; (3) supply a form for demanding payment that
includes the date of the first announcement to news media or to shareholders of
the terms of the Proposed Amendment and requires that the person asserting
dissenters' rights certify whether or not he acquired beneficial ownership of
the Shares before that date; (4) set a date by which the Company must receive
the payment demand, which date may not be fewer than 30 nor more than 60 days
after the date the notice described in the first sentence of this paragraph is
delivered; and (5) be accompanied by a copy of Article 13 of the Mississippi
Business Corporation Act.
 
                                       19
<PAGE>   20
 
     A shareholder who has been sent a dissenters' notice from the Company must
demand payment, certify whether he or she acquired beneficial ownership of the
Shares before the date required to be set forth in the notice from the Company
pursuant to clause (3) above and deposit his or her certificates in accordance
with the terms of the notice from the Company. A shareholder who demands payment
and deposits his or her Shares will retain all other rights as a shareholder
until his or her rights are canceled or modified by the Proposed Amendment
becoming effective. A shareholder who does not demand payment or deposit his
certificates where required, each by the date set in the notice sent by the
Company, will not be entitled to payment for his or her Shares under the
Mississippi Business Corporation Act.
 
     Except for after-acquired Shares of a Preferred Shareholder, as soon as the
Proposed Amendment is effective, or upon receipt of a payment demand, the
Company will be required to pay each dissenter who complied with the Mississippi
Business Corporation Act the amount the Company estimates to be the fair value
of his or her Shares, plus accrued interest. The payment must be accompanied by:
(1) a balance sheet of the Company as of December 31, 1996, an income statement
for that year, a statement of changes in shareholders' equity for that year and
the latest available interim financial statements of the Company, if any; (2) a
statement of the estimate of the Company of the fair value of the Shares; (3) an
explanation of how interest was calculated; (4) a statement of the right of the
dissenter to demand payment if the shareholder is dissatisfied with the payment
or offer; and (5) a copy of Article 13 of the Mississippi Business Corporation
Act.
 
     If the Company does not effect the Proposed Amendment within 60 days after
the date set for demanding payment and depositing Share certificates, the
Company will return the deposited certificates and release the transfer
restrictions imposed on uncertificated Shares. If, after returning deposited
certificates and releasing transfer restrictions, the Company effects the
Proposed Amendment, it must send a new notice to dissenters under Article 13 of
the Mississippi Business Corporation Act and repeat the payment demand
procedure.
 
     The Company may elect to withhold payment required as described above from
a dissenter unless such dissenter was the beneficial owner of the Shares before
the date set forth in the notice to dissenters as the date of the first
announcement to news media or to shareholders of the terms of the Proposed
Amendment. To the extent the Company elects to withhold payment as set forth in
the preceding sentence, after the Proposed Amendment is effected, the Company
shall estimate the fair value of the Shares, plus accrued interest, and shall
pay this amount to each dissenter who agrees to accept it in full satisfaction
of his or her demand. The Company shall send with its offer a statement of its
estimate of the fair value of the Shares, an explanation of how interest was
calculated and a statement of the right of the dissenter to demand payment if
the dissenter is dissatisfied with the payment or offer.
 
     A dissenter may notify the Company in writing of his or her own estimate of
the fair value of his or her Shares and the amount of interest due, and demand
payment of his or her estimate (less any payment made theretofore by the
Company), or reject the Company's offer and demand payment of the fair value of
his or her Shares and interest due, if: (1) the dissenter believes that the
amount paid or offered by the Company is less than the fair value of his or her
Shares or that the interest due is incorrectly calculated; (2) the Company fails
to make payment within 60 days after the date set for demanding payment; or (3)
the Company, having failed to effect the Proposed Amendment, does not return the
deposited certificates or release the transfer restrictions imposed on
uncertificated Shares within 60 days after the date set for demanding payment. A
dissenter waives his or her right to demand payment under the foregoing
procedure unless he or she notifies the Company of his or her demand in writing
within 30 days after the Company made or offered payment for his or her Shares.
 
     Judicial Appraisal of Shares.  If a demand for payment remains unsettled,
the Company shall commence a proceeding within 60 days after receiving the
payment demand and petition the court to determine the fair value of the Shares
and accrued interest. If the Company does not commence the proceeding within the
60-day period, it shall pay each dissenter whose demand remains unsettled the
amount demanded. The Company shall commence the proceeding in the chancery court
of the county where its principal office is located, and it shall make all
dissenters whose demands remain unsettled parties to the proceeding as in an
action against their Shares and all parties must be served with a copy of the
petition. The
 
                                       20
<PAGE>   21
 
jurisdiction of the court in which the proceeding is commenced will be
exclusive. The court may appoint one or more persons as appraisers to receive
evidence and recommend decision on the question of fair value. The dissenters
will be entitled to the same discovery rights as parties in other civil
proceedings. Each dissenter made a party to the proceeding is entitled to
judgment (1) for the amount, if any, by which the court finds that fair value of
his or her Shares, plus interest, exceeds the amount paid by the Company, or (2)
for the fair value, plus accrued interest, of his after-acquired Shares for
which the Company elected to withhold payment.
 
     The court in an appraisal proceeding will determine all costs of the
proceeding, including the reasonable compensation and expenses of appraisers
appointed by the court. The court will assess the costs against the Company,
except that the court may assess costs against all or some of the dissenters, in
amounts the court finds equitable, to the extent the court finds the dissenters
acted arbitrarily, vexatiously or not in good faith in demanding payment. The
court may also assess the fees and expenses of counsel and experts for the
respective parties in amounts the court finds equitable: (1) against the Company
and in favor of any or all dissenters if the court finds the Company did not
substantially comply with the relevant requirements of the Mississippi Business
Corporation Act; or (2) against either the Company or a dissenter, in favor of
any other party, if the court finds that the party against whom the fees and
expenses are assessed acted arbitrarily, vexatiously or not in good faith with
respect to the rights provided by Article 13 of the Mississippi Business
Corporation Act. If the court finds that the services of counsel for any
dissenter were of substantial benefit to other dissenters similarly situated,
and that the fees for those services should not be assessed against the Company,
the court may award the counsel reasonable fees to be paid out of the amounts
awarded to dissenters who were benefited.
 
INDEPENDENT PUBLIC ACCOUNTANTS
 
     No representative of Arthur Andersen LLP, the Company's independent public
accountants, is expected to be present at the Special Meeting unless prior to
the day of the Special Meeting the Secretary of the Company has received written
notice from a Preferred Shareholder addressed to the Secretary at 2992 West
Beach, Gulfport, Mississippi 39501 that such Preferred Shareholder will attend
the Special Meeting and wishes to ask questions of a representative of Arthur
Andersen LLP.
 
                        PRICE RANGE OF SHARES; DIVIDENDS
 
     The 4.40% Series, 4.60% Series and 4.72% Series are traded in the
over-the-counter market under the symbols "MPRWL," "MPRWP" and "MSPWP,"
respectively. The last reported sale price in the over-the-counter market, as of
the close of business on October 30, 1997, for each of the Series of Preferred
is shown on the front cover of this Offer to Purchase and Proxy Statement.
However, Preferred Shareholders should be aware that the Shares of each Series
of Preferred trade only sporadically and on a limited basis and, therefore, the
last reported sales price may not necessarily reflect the market value of the
Shares.
 
     PREFERRED SHAREHOLDERS ARE URGED TO OBTAIN CURRENT MARKET QUOTATIONS, IF
AVAILABLE, FOR THE SHARES.
 
     The following table sets forth the high and low sales prices of each Series
of Preferred in the over-the-counter market, as reported by the National
Quotation Bureau, LLC, and the cash dividends paid thereon for the fiscal
quarters indicated.
 
                                       21
<PAGE>   22
 
               DIVIDENDS AND PRICE RANGES OF SERIES OF PREFERRED
                       BY QUARTERS (1995, 1996 AND 1997)
 
<TABLE>
<CAPTION>
                                  1995-QUARTER             1996-QUARTERS                  1997-QUARTERS
                                  ------------   ---------------------------------   ------------------------
                                      4TH         1ST      2ND      3RD      4TH      1ST      2ND      3RD
                                  ------------   ------   ------   ------   ------   ------   ------   ------
<S>                               <C>            <C>      <C>      <C>      <C>      <C>      <C>      <C>
4.40% SERIES
Dividends Per Share.............     $ 1.10      $ 1.10   $ 1.10   $ 1.10   $ 1.10   $ 1.10   $ 1.10   $ 1.10
Market Price -- $ Per Share
  -- High.......................      65.78       61.00    60.88    63.95    62.75    64.50    61.38    67.13
  -- Low........................      63.75       61.00    59.00    58.50    60.50    64.50    61.38    61.00
4.60% SERIES
Dividends Per Share.............     $ 1.15      $ 1.15   $ 1.15   $ 1.15   $ 1.15   $ 1.15   $ 1.15   $ 1.15
Market Price -- $ Per Share
  -- High.......................      66.13       64.50    62.63    63.00    61.50    65.75    63.38    67.25
  -- Low........................      59.75       61.00    59.00    57.50    61.50    63.50    63.38    67.25
4.72% SERIES
Dividends Per Share.............     $ 1.18      $ 1.18   $ 1.18   $ 1.18   $ 1.18   $ 1.18   $ 1.18   $ 1.18
Market Price -- $ Per Share
  -- High.......................      95.50       65.30       --    65.63    67.38    66.90       --    80.00
  -- Low........................      72.00       62.75       --    61.25    62.75    66.90       --    63.13
</TABLE>
 
- ---------------
 
Dash indicates no sales during the quarter.
 
     Dividends for a Series of Preferred are payable when, as and if declared by
the Company's Board of Directors at the rate per annum included in such title of
the Series of Preferred listed on the front cover of this Offer to Purchase and
Proxy Statement. The Company will pay tendering Preferred Shareholders the
Interim Dividend. Tendering Preferred Shareholders will not be entitled to
dividends in respect of any later dividend periods (or any portion thereof).
 
               PURPOSE OF THE OFFER; CERTAIN EFFECTS OF THE OFFER
 
     Southern believes that the purchase of the Shares at this time represents
an attractive economic opportunity that will benefit the Company and,
indirectly, Southern and its shareholders. In addition, the Offer gives
Preferred Shareholders the opportunity to sell their Shares at a price which
Southern believes to be a premium to the market price on the date of the
announcement of the Offer and without the usual transaction costs associated
with a sale.
 
     After the consummation of the Offer, Southern or the Company may purchase
additional Shares on the open market, in privately negotiated transactions,
through one or more tender offers or otherwise. Any such purchases may be on the
same terms as, or on terms which are more or less favorable to holders of Shares
than, the terms of the Offer. However, Rule 13e-4(f)(6) under the Exchange Act
prohibits Southern and its affiliates (including the Company) from purchasing
any Shares of a Series of Preferred, other than pursuant to the Offer, until at
least ten business days after the Expiration Date with respect to such Series of
Preferred. Any future purchases of Shares by Southern or the Company would
depend on many factors, including the market price of the Shares, Southern's
business and financial position, legal restrictions on Southern's ability to
purchase Shares as well as general economic and market conditions.
 
     Preferred Shareholders are not under any obligation to tender Shares
pursuant to the Offer. The Offer does not constitute notice of redemption of any
Series of Preferred pursuant to the Company's Charter, nor does Southern or the
Company intend to effect any such redemption by making the Offer. Further, the
Offer does not constitute a waiver by the Company of any option it has to redeem
Shares. The 4.40% Series, the 4.60% Series and the 4.72% Series are presently
callable at $104.32 per Share, $107.00 per Share and $102.25 per Share,
respectively. The Shares of each Series of Preferred have no preemptive or
conversion rights.
 
     Upon liquidation or dissolution of the Company, owners of the Shares would
be entitled to receive an amount equal to the liquidation preference per Share
($100) (except that the amount payable in the event of a voluntary liquidation
shall be an amount equivalent to the then current redemption price per Share for
 
                                       22
<PAGE>   23
 
Shares of the 4.72% Series), plus all accrued and unpaid dividends (whether or
not earned or declared) thereon to the date of payment, prior to the payment of
any amounts to the holders of the Company's common stock.
 
     Shares validly tendered to the Depositary pursuant to the Offer and not
withdrawn in accordance with the procedures set forth herein shall be held until
the Expiration Date (or returned to the extent the Offer is terminated in
accordance herewith). To the extent that the Proposed Amendment is approved and
the Shares tendered are accepted for payment and paid for in accordance with the
terms hereof, Southern intends to sell its Shares to the Company and, at that
time, it is expected that the Company will retire and cancel the Shares.
However, in the event the Proposed Amendment is not adopted at the Special
Meeting, Southern may elect, but is not obligated to, waive such condition,
subject to applicable law. In that case, subsequent to Southern's waiver and
purchase of the Shares, the Company anticipates that, as promptly as practicable
thereafter, it would either adjourn the Special Meeting or call another special
meeting of its shareholders and solicit proxies therefrom for an amendment
substantially similar to the Proposed Amendment. At that meeting, Southern would
vote any Shares acquired by it pursuant to the Offer or otherwise (together with
its shares of common stock) in favor of such amendment, thereby maximizing the
prospects for the adoption of the amendment. Any such purchase of Shares by
Southern will reduce the number of Shares of each of the Series of Preferred
that might otherwise trade publicly or become available for purchase and/or sale
and likely will reduce the number of owners of Shares of each of the Series of
Preferred, which could adversely affect the liquidity and sale value of the
Shares not purchased in the Offer.
 
     Liquidity of Trading Market.  To the extent that Shares of any Series of
Preferred are tendered and accepted for payment in the Offer, the trading market
for Shares of such Series of Preferred that remain outstanding may be
significantly more limited, which might adversely affect the liquidity, market
value and price volatility of such Shares. Equity securities with a smaller
outstanding market value available for trading (the "float") may command a lower
price than would comparable equity securities with a greater float. Therefore,
the market price for Shares that are not tendered in the Offer may be affected
adversely to the extent that the amount of Shares purchased pursuant to the
Offer reduces the float. The reduced float may also make the trading price of
the Shares that are not tendered and accepted for payment more volatile.
Preferred Shareholders of the remaining Shares may attempt to obtain quotations
for the Shares from their brokers; however, there can be no assurance that any
trading market will exist for such Shares following consummation of the Offer.
To the extent a market continues to exist for the Shares after the Offer, the
Shares may trade at a discount compared to present trading depending on the
market for Shares with similar features, the performance of the Company, and
other factors. There is no assurance that an active market in the Shares will
exist following consummation of the Offer and no assurance as to the prices at
which the Shares may then trade.
 
     The purchase of Shares of the Series of Preferred Stock pursuant to the
Offer will reduce the number of holders of Shares of the Series of Preferred
Stock and the number of such Shares that might otherwise trade publicly, and,
depending upon the number of Shares so purchased, such reduction could adversely
affect the liquidity and market value of the remaining Shares of the Series of
Preferred Stock held by the public. The extent of the public market for the
Shares of the Series of Preferred Stock and the availability of price quotations
would, however, depend upon such factors as the number of shareholders remaining
at such time, the interest in maintaining a market in the Shares of the Series
of Preferred Stock on the part of securities firms and other factors. As of
October 28, 1997, there were 112 registered holders of the 4.40% Series, 444
registered holders of the 4.60% Series and 21 registered holders of the 4.72%
Series.
 
     Other Potential Effects of the Proposed Amendment on Preferred Shareholders
who do not Tender.  If the Proposed Amendment becomes effective, Shares that are
not tendered and purchased pursuant to the Offer will no longer be subject to
the Restriction Provisions, which will have been deleted by the Proposed
Amendment. As discussed above, the Restriction Provisions place restrictions on
the Company's ability to issue securities representing unsecured indebtedness,
to sell assets, merge or consolidate and to pay dividends on its common stock in
the event that its common equity capitalization falls below certain levels.
Although the Company's debt instruments may contain certain restrictions on the
Company's ability to issue or assume debt, any such restrictions may be waived
and the increased flexibility afforded the Company by the deletion
 
                                       23
<PAGE>   24
 
of the Debt Limitation Provision may permit the Company to take certain actions
that may increase the credit risks with respect to the Company, adversely
affecting the market price and credit rating of the remaining Shares, or
otherwise be materially adverse to the interests of the remaining Preferred
Shareholders. In addition, to the extent that the Company elects to fund its
purchase of the Shares by issuing additional unsecured debt, the remaining
Preferred Shareholders' relative position in the Company's capital structure
could be perceived to decline, which in turn could adversely affect the market
price and credit rating of the remaining Shares. See, however, "Proposed
Amendment and Proxy Solicitation -- Reasons for the Proposed Amendment."
 
     The Proposed Amendment, if it becomes effective, would delete the Merger
Provision and, therefore, may permit the Company to engage in certain
transactions not subject to approval by the Commission under the Holding Company
Act that would otherwise have required the consent of preferred stockholders. In
addition, elimination of the Common Stock Dividend Provision may permit the
Company to pay common stock dividends in amounts that would otherwise have been
prohibited. Any such transaction or payment may have a material adverse effect
on the holders of the Company's preferred stock. As described under "Proposed
Amendment and Proxy Solicitation -- Reasons for the Proposed Amendment,"
however, adoption of the Proposed Amendment will not affect voting rights of
stockholders or restrictions on the Company's ability to pay common stock
dividends under applicable state law.
 
     Following the consummation of the Offer, the business and operations of the
Company are currently expected to be continued substantially as they are
currently being conducted. Except as disclosed in this Offer to Purchase and
Proxy Statement, Southern and the Company currently have no plans or proposals
that relate to or would result in: (a) the acquisition by any person or entity
of additional securities of the Company or the disposition of securities of the
Company, other than in the ordinary course of business; (b) an extraordinary
corporate transaction, such as a merger, reorganization or liquidation,
involving the Company or any of its subsidiaries; (c) a sale or transfer of a
material amount of assets of the Company or any of its subsidiaries; (d) any
change in the present Board or management of the Company; (e) any material
change in the present dividend rate or policy, or indebtedness or capitalization
of the Company; (f) any other material change in the Company's corporate
structure or business; (g) any change in the Company's Charter or by-laws or any
actions that may impede the acquisition of control of the Company by any person;
(h) a class of equity securities of the Company being delisted from a national
securities exchange or no longer authorized to be quoted on the OTC; (i) a class
of equity securities of the Company becoming eligible for termination of
registration pursuant to Section 12(g)(4) of the Exchange Act; or (j) the
suspension of the Company's obligation to file reports pursuant to Section 15(d)
of the Exchange Act.
 
     However, in order to adapt to the increasingly competitive environment in
which they operate, Southern and its operating affiliates, including the
Company, will evaluate and consider a wide array of potential business
strategies. These may include business combinations or acquisitions involving
other utility or non-utility businesses or properties, internal restructurings
or reorganizations involving Southern, its operating affiliates or some
combination thereof or dispositions of currently owned properties or currently
operated business units. Furthermore, Southern and its operating affiliates,
including the Company, may engage in other new business ventures which arise
from competitive and regulatory changes in the utility industry. Pursuit of any
of the above strategies, or any combination thereof, may significantly affect
the business operations and financial condition of Southern and its operating
affiliates, including the Company.
 
     NEITHER SOUTHERN, THE COMPANY, THEIR RESPECTIVE BOARDS OF DIRECTORS, NOR
ANY OF THEIR RESPECTIVE OFFICERS MAKES ANY RECOMMENDATION TO ANY PREFERRED
SHAREHOLDER AS TO WHETHER TO TENDER ALL OR ANY SHARES. EACH PREFERRED
SHAREHOLDER MUST MAKE HIS OR HER OWN DECISION AS TO WHETHER TO TENDER SHARES
AND, IF SO, HOW MANY SHARES TO TENDER.
 
                    CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
     In the opinion of Troutman Sanders LLP, counsel to Southern, the following
summary describes the principal United States Federal income tax consequences of
(i) sales of Shares pursuant to the Offer, (ii) the
 
                                       24
<PAGE>   25
 
receipt of the Interim Dividend and (iii) the receipt of Special Cash Payments
in connection with the approval and adoption of the Proposed Amendment. This
summary is based on the Internal Revenue Code of 1986, as amended to the date
hereof (the "Code"), administrative pronouncements, judicial decisions and
existing and proposed Treasury Regulations, changes to any of which subsequent
to the date of this Offer to Purchase and Proxy Statement may adversely affect
the tax consequences described herein, possibly on a retroactive basis. This
summary is addressed to Preferred Shareholders who hold Shares as capital assets
within the meaning of Section 1221 of the Code. This summary does not discuss
all of the tax consequences that may be relevant to a Preferred Shareholder in
light of such Preferred Shareholder's particular circumstances or to Preferred
Shareholders subject to special rules (including certain financial institutions,
tax-exempt organizations, insurance companies, dealers in securities or
currencies, certain former residents or former citizens of the United States,
foreign persons or entities selling Shares pursuant to the Offer who own or have
owned, actually or constructively, more than five percent of such Shares,
Preferred Shareholders who acquired their Shares pursuant to the exercise of
stock options or other compensation arrangements with the Company or Preferred
Shareholders holding the Shares as part of a conversion transaction, as part of
a hedge or hedging transaction, or as a position in a straddle for tax
purposes). PREFERRED SHAREHOLDERS SHOULD CONSULT THEIR TAX ADVISORS WITH REGARD
TO THE APPLICATION OF THE UNITED STATES FEDERAL INCOME TAX LAWS TO THEIR
PARTICULAR SITUATIONS AS WELL AS ANY TAX CONSEQUENCES ARISING UNDER THE LAWS OF
ANY STATE, LOCAL OR FOREIGN TAXING JURISDICTION.
 
     As used herein, the term "United States Holder" means a beneficial owner of
a Share that is (i) for United States Federal income tax purposes a citizen or
resident of the United States; (ii) a corporation, partnership or other entity
created or organized in or under the laws of the United States or of any
political subdivision thereof; (iii) an estate, the income of which is subject
to United States Federal income taxation regardless of its source; or (iv) any
trust that is not a foreign trust under Section 7701(a)(31) of the Code. As used
herein, the term "Non-United States Holder" means a beneficial owner of a Share
that is not a United States Holder.
 
  Tax Considerations Generally
 
     A sale of Shares or the receipt of a Special Cash Payment by a Preferred
Shareholder pursuant to the Offer will be a taxable transaction for United
States Federal income tax purposes. However, Preferred Shareholders, whether or
not they receive Special Cash Payments, will not recognize any taxable income or
loss with respect to the Shares as a result of the modification of the Charter
by the Proposed Amendment.
 
  Tax Considerations for Tendering Preferred Shareholders
 
     United States Holders.  A United States Holder who tenders Shares pursuant
to the Offer generally will recognize taxable gain or loss equal to the
difference between the tax basis of such Holder's Shares and, subject to the
discussion below, the amount of cash received in exchange therefor. A United
States Holder's gain or loss will be long-term capital gain or loss if the
holding period for the Shares is more than one year as of the date of the sale
of such Shares. The excess of net long-term capital gains over net short-term
capital losses is taxed at preferential rates for certain non-corporate
taxpayers. If such a non-corporate taxpayer's holding period for the Shares is
more than eighteen months, then any gain recognized will be taxed at further
reduced rates. The distinction between capital gain or loss and ordinary income
or loss is also relevant for purposes of, among other things, limitations on the
deductibility of capital losses.
 
     Southern will treat a portion of the cash received by a tendering Preferred
Shareholder pursuant to the Offer as consideration paid in exchange for the vote
of such Preferred Shareholder in favor of the Proposed Amendment, rather than as
consideration paid in exchange for its tendered Shares (the "Special Cash
Payment Equivalent Amount"). The Special Cash Payment Equivalent Amount will be
equal to the Special Cash Payment a tendering Preferred Shareholder would have
been eligible to receive if such Preferred Shareholder had voted in favor of the
Proposed Amendment but had not tendered its Shares. While the appropriate
characterization of the Special Cash Payment Equivalent Amount for United States
Federal income tax purposes is not entirely clear, for Federal income tax
withholding and information reporting
 
                                       25
<PAGE>   26
 
purposes Southern will treat the Special Cash Payment Equivalent Amount as
ordinary, non-dividend income to tendering Preferred Shareholders.
 
     To the extent the Interim Dividend paid to tendering Preferred Shareholders
is paid out of the Company's current earnings and profits, or accumulated
earnings and profits, it generally will constitute a dividend taxable as
ordinary income for Federal income tax purposes as provided in Sections 301 and
316 of the Code. If the Interim Dividend exceeds the Company's current and
accumulated earnings and profits, it will first be treated as a return of
capital, reducing the United States Holder's adjusted tax basis. Any amount in
excess of a United States Holder's adjusted tax basis will be treated as being
received in exchange for the underlying stock and taxed in the same manner as
the purchase price paid by Southern.
 
     Non-United States Holders.  Any gain realized upon the sale of Shares by a
Non-United States Holder pursuant to the Offer generally will not be subject to
United States Federal income tax unless (i) such gain is effectively connected
with a trade or business in the United States of the Non-United States Holder,
or (ii) in the case of a Non-United States Holder who is an individual, such
individual is present in the United States for 183 days or more in the taxable
year of such sale and certain other conditions are met.
 
     A Non-United States Holder described in clause (i) above will be taxed on
the net gain derived from the sale at regular graduated United States Federal
income tax rates. A Non-United States Holder that is a foreign corporation
described in clause (i) above may also be subject to an additional "branch
profits tax" at a 30% rate (or such lower rate as may be specified by an
applicable income tax treaty). Unless an applicable tax treaty provides
otherwise, an individual Non-United States Holder described in clause (ii) above
will be subject to a flat 30% tax on the gain derived from the sale, which may
be offset by United States capital losses (notwithstanding the fact that such
individual is not considered a resident of the United States).
 
     Southern will treat a portion of the cash paid to a tendering Non-United
States Holder pursuant to the Offer as a Special Cash Payment Equivalent Amount,
in the same manner as described above under "United States Holders." Subject to
certain exceptions to the withholding requirements summarized below with respect
to the Special Cash Payments under "Special Cash Payments -- Non-United States
Holders," Southern will treat the Special Cash Payment Equivalent Amount as
subject to withholding of United States Federal income tax at a rate of 30%.
 
     Subject to the discussion under "Tax Considerations for Tendering Preferred
Shareholder -- United States Holders," above, the Interim Dividend generally
will constitute a dividend taxable as ordinary income and generally will be
subject to United States withholding tax (or, in the case of dividends
effectively connected with the conduct of a United States trade or business,
regular United States tax and, if applicable, branch profits tax) in the same
manner as other dividends paid by the Company.
 
  Special Cash Payments
 
     United States Holders.  The Federal income tax consequences of the receipt
by non-tendering Preferred Shareholders of Special Cash Payments is not entirely
clear. The Company will, for Federal income tax withholding and information
reporting purposes, treat Special Cash Payments as ordinary, non-dividend income
to recipient United States Holders.
 
     Non-United States Holders.  The Company will treat Special Cash Payments
paid to non-tendering Non-United States Holders as subject to withholding of
United States Federal income tax at a rate of 30%. However, a Special Cash
Payment that is effectively connected with the conduct of a trade or business by
a Non-United States Holder within the United States will not be subject to such
withholding tax (provided such Non-United States Holder provides two originals
of Internal Revenue Service ("IRS") Form 4224 stating that such Special Cash
Payments are so effectively connected), but instead will be subject to United
States Federal income tax on a net income basis at applicable graduated
individual or corporate rates. Any such effectively connected Special Cash
Payments received by a foreign corporation may, under certain circumstances, be
subject to an additional "branch profits tax" at a 30% rate (or such lower rate
as may be specified by an applicable income tax treaty).
 
                                       26
<PAGE>   27
 
     A Non-United States Holder eligible for a reduced rate of United States
withholding tax pursuant to an income tax treaty may obtain a refund of any
excess amounts withheld by filing an appropriate claim for refund with the IRS.
 
  Backup Withholding
 
     ANY PREFERRED SHAREHOLDER WHO TENDERS, OR WHO VOTES IN FAVOR OF THE
PROPOSED AMENDMENT (BUT DOES NOT TENDER), AND WHO FAILS TO COMPLETE AND SIGN THE
SUBSTITUTE FORM W-9 THAT IS INCLUDED IN THE APPLICABLE LETTER OF TRANSMITTAL AND
PROXY (OR, IN THE CASE OF A FOREIGN PREFERRED SHAREHOLDER, FORM W-8 OBTAINABLE
FROM THE DEPOSITARY) MAY BE SUBJECT TO A REQUIRED FEDERAL INCOME TAX BACKUP
WITHHOLDING OF 31% OF (I) IN THE CASE OF A TENDERING PREFERRED SHAREHOLDER, THE
GROSS PROCEEDS PAYABLE TO SUCH PREFERRED SHAREHOLDER IN EXCHANGE FOR THE SHARES
(INCLUDING THE SPECIAL CASH PAYMENT EQUIVALENT AMOUNT) AND THE INTERIM DIVIDEND
OR (II) IN THE CASE OF A NON-TENDERING PREFERRED SHAREHOLDER WHO VOTES IN FAVOR
OF THE PROPOSED AMENDMENT, THE SPECIAL CASH PAYMENT. To prevent United States
Federal income tax backup withholding with respect to the purchase price of
Shares purchased pursuant to the Offer (including the Special Cash Payment
Equivalent Amount) or the Special Cash Payment, as applicable, a United States
Holder must provide the Depositary with the Preferred Shareholder's correct
taxpayer identification number and certify that the Preferred Shareholder is not
subject to backup withholding of Federal income tax by completing the Substitute
Form W-9 included in the applicable Letter of Transmittal and Proxy. Certain
Preferred Shareholders (including, among others, all corporations and certain
foreign shareholders) are exempt from backup withholding. For a corporate United
States Holder to qualify for such exemption, such Preferred Shareholder must
provide the Depositary with a properly completed and executed Substitute Form
W-9 attesting to its exempt status. In order for a foreign Preferred Shareholder
to qualify as an exempt recipient, the foreign holder must submit a Form W-8,
Certificate of Foreign Status, signed under penalties of perjury, attesting to
that Preferred Shareholder's exempt status. A copy of Form W-8 may be obtained
from the Depositary.
 
     Unless a Preferred Shareholder provides the appropriate certification,
under the applicable law and regulations concerning "backup withholding" of
United States Federal income tax, the Depositary will be required to withhold,
and will withhold, 31% of the gross amount otherwise payable to such Preferred
Shareholder or other payee. The amount of any backup withholding from a payment
to a Preferred Shareholder will be allowed as a credit against such Preferred
Shareholder's United States Federal income tax liability and may entitle such
Preferred Shareholder to a refund, provided that the required information is
furnished to the IRS. However, backup withholding is not required for amounts
subject to withholding discussed above under "Tax Considerations for Tendering
Preferred Shareholders -- Non-United States Holders" and "Special Cash
Payments -- Non-United States Holders."
 
                           SOURCE AND AMOUNT OF FUNDS
 
     Assuming that Southern purchases all outstanding Shares pursuant to the
Offer, the total amount required by Southern to purchase such Shares will be
approximately $10 million, including fees and other expenses. Southern intends
to fund the Offer through the use of its general funds (which, in the ordinary
course, include funds from the Company) and funds borrowed pursuant to
Southern's commercial paper program.
 
               TRANSACTIONS AND AGREEMENTS CONCERNING THE SHARES
 
     Based upon Southern's and the Company's records and upon information
provided to each of Southern and the Company by its directors and executive
officers, neither Southern, the Company nor, to the knowledge of either, any of
their subsidiaries, affiliates, directors or executive officers, or associates
of the foregoing, has engaged in any transactions involving Shares during the 40
business days preceding the date hereof. Neither
 
                                       27
<PAGE>   28
 
the Company nor, to the knowledge of either, any of its directors or executive
officers or an associate of the foregoing is a party to any contract,
arrangement, understanding or relationship relating directly or indirectly to
the Offer with any other person or entity with respect to any securities of the
Company.
 
                       FEES AND EXPENSES PAID TO DEALERS
 
     Dealer Manager Fees.  Merrill Lynch will act as Dealer Manager for Southern
in connection with the Offer. Southern has agreed to pay the Dealer Manager a
fee of an amount equal to 0.50% of the par value per Share for any Shares
tendered, accepted for payment and paid for pursuant to the Offer and a fee of
an amount equal to 0.50% of the par value per Share for any Shares that are not
tendered pursuant to the Offer but which are voted in favor of the Proposed
Amendment. The Dealer Manager will also be reimbursed by Southern for certain
reasonable out-of-pocket expenses and will be indemnified against certain
liabilities, including certain liabilities under the federal securities laws, in
connection with the Offer. The Dealer Manager has rendered, is currently
rendering and is expected to continue to render various investment banking and
other advisory services to Southern, the Company and certain of its affiliates.
The Dealer Manager has received, and will continue to receive, customary
compensation from Southern, the Company and its affiliates for such services.
Southern has retained The Bank of New York as Depositary and Corporate Investor
Communications, Inc. as Information Agent in connection with the Offer. The
Depositary and Information Agent will receive reasonable and customary
compensation for their services and will also be reimbursed for reasonable
out-of-pocket expenses, including attorney fees. Neither the Depositary nor the
Information Agent has been retained to make solicitations or recommendations in
connection with the Offer.
 
     Solicited Tender Fees; Separate Fees.  Southern will pay a solicitation fee
of an amount equal to 1.50% of the par value per Share for Shares that are
tendered, accepted for payment and paid for pursuant to the Offer (except that
for transactions for beneficial owners whose ownership equals or exceeds 2,500
Shares, Southern will pay a solicitation fee of an amount equal to 1.00% of the
par value per Share). If the Proposed Amendment is approved and adopted, the
Company agrees to pay a separate fee of an amount equal to 0.50% of the par
value per Share for Shares that are not tendered pursuant to the Offer but which
are voted in favor of the Proposed Amendment (except that with respect to
transactions for beneficial owners whose ownership equals or exceeds 2,500
Shares, the Company will pay a separate fee of an amount equal to 0.25% of the
par value of such Shares). With respect to fees payable pursuant to this
paragraph involving transactions for beneficial owners whose ownership is less
than 2,500 Shares, any fees payable hereunder shall be paid in full to the
Dealer Manager unless a Soliciting Dealer is designated (as herein described),
in which case such fee shall be payable in full to such designated Soliciting
Dealer (which designated Soliciting Dealer may be the Dealer Manager). With
respect to fees payable pursuant to this paragraph involving transactions for
beneficial owners whose ownership equals or exceeds 2,500 Shares, any fees
payable hereunder shall be paid in full to the Dealer Manager unless a
Soliciting Dealer is designated, in which case 80% of such fee shall be paid to
the Dealer Manager and 20% of such fee shall be paid to the designated
Soliciting Dealer (which designated Soliciting Dealer may be the Dealer
Manager). A designated Soliciting Dealer is an entity obtaining the tender or
proxy, if the Letter of Transmittal and Proxy shall include its name and it is
(a) any broker or dealer in securities, including the Dealer Manager in its
capacity as a dealer or broker, which is a member of any national securities
exchange or of the NASD, (b) any foreign broker or dealer not eligible for
membership in the NASD which agrees to conform to the NASD's Rules of Fair
Practice in soliciting tenders outside the United States to the same extent as
though it were an NASD member, or (c) any bank or trust company.
 
     No such solicitation fee or separate fee shall be payable to a Soliciting
Dealer with respect to the tender of Shares by a holder unless the Letter of
Transmittal and Proxy accompanying such tender designates such Soliciting
Dealer. No such fee shall be payable to a Soliciting Dealer in respect of Shares
registered in the name of such Soliciting Dealer unless such Shares are held by
such Soliciting Dealer as nominee and such Shares are being tendered for the
benefit of one or more beneficial owners identified on the Letter of Transmittal
and Proxy or on the Notice of Solicited Tenders and Proxies (included in the
materials provided to brokers and dealers). No such fee shall be payable to a
Soliciting Dealer with respect to the tender of Shares by the holder of record,
for the benefit of the beneficial owner, unless the beneficial owner has
designated such Soliciting Dealer. Beneficial owners should review Instruction
10 and complete the "Solicited
 
                                       28
<PAGE>   29
 
Tenders and Proxies" box in the accompanying Letter of Transmittal and Proxy to
designate a Soliciting Dealer. If tendered Shares are being delivered by
book-entry transfer, the Soliciting Dealer must return a Notice of Solicited
Tenders and Proxies to the Depositary within three business days after
expiration of the Offer to receive a solicitation fee. No such fee shall be
payable to a Soliciting Dealer if such Soliciting Dealer is required for any
reason to transfer the amount of such fee to a depositing holder (other than
itself). No such fee shall be paid to a Soliciting Dealer with respect to Shares
tendered for such Soliciting Dealer's own account. No broker, dealer, bank,
trust company or fiduciary shall be deemed to be the agent of Southern, the
Company, the Depositary, the Information Agent or the Dealer Manager for
purposes of the Offer.
 
     Soliciting Dealers will include any of the organizations described in
clauses (a), (b) and (c) above even when the activities of such organizations in
connection with the Offer consist solely of forwarding to clients materials
relating to the Offer, including the Letter of Transmittal and Proxy, and
tendering Shares as directed by beneficial owners thereof. No Soliciting Dealer
is required to make any recommendation to holders of Shares as to whether to
tender or refrain from tendering in the Offer. No assumption is made, in making
payment to any Soliciting Dealer, that its activities in connection with the
Offer included any activities other than those described above, and for all
purposes noted in all materials relating to the Offer, the term "solicit" shall
be deemed to mean no more than "processing shares tendered," "processing shares
voted" or "forwarding to customers materials regarding the Offer."
 
     Stock Transfer Taxes.  Southern will pay all stock transfer taxes, if any,
payable on account of the acquisition of Shares by Southern pursuant to the
Offer, except in certain circumstances where special payment or delivery
procedures are utilized pursuant to Instruction 6 of the accompanying Letter of
Transmittal and Proxy.
 
             CERTAIN INFORMATION REGARDING SOUTHERN AND THE COMPANY
 
     The Company is an operating utility primarily engaged in the generation,
transmission and distribution of electric power to approximately 190,000
customers in southeastern Mississippi, and in supplying electric power at
wholesale to other electric utility companies and municipalities. All of the
common stock of the Company is owned by Southern, a registered holding company
under the Holding Company Act. Southern also owns all of the outstanding common
stock of Alabama Power Company ("ALABAMA"), Georgia Power Company ("GEORGIA"),
Gulf Power Company ("GULF") and Savannah Electric and Power Company ("SAVANNAH")
(ALABAMA, GEORGIA, GULF, the Company and SAVANNAH being collectively referred to
herein as the "operating affiliates"), each of which is an operating public
utility company, and of Southern Company Services, Inc. (the system service
company). ALABAMA and GEORGIA each owns 50% of the outstanding common stock of
Southern Electric Generating Company ("SEGCO"). The operating affiliates supply
electric services in the states of Alabama, Florida, Georgia and Mississippi,
respectively, and SEGCO owns generating units at a large electric generating
station which supplies power to ALABAMA and GEORGIA. Southern also owns all the
outstanding common stock of Southern Energy, Inc. ("Southern Energy"), The
Southern Development and Investment Group, Inc. ("Southern Development"),
Southern Nuclear Energy Operating Company, Inc. ("Southern Nuclear") and
Southern Communications Services, Inc. ("Southern Communications"). Southern
Energy designs, builds, owns and operates power production and delivery
facilities and provides a broad range of technical services to industrial
companies and utilities in the United States and a number of international
markets. Southern Development explores, develops and markets energy management
services and other business lines relating to Southern's core business of
generating and distributing energy. Southern Nuclear provides services to the
Southern electric system's nuclear plants. Southern Communications provides
digital wireless communications services to the operating affiliates and
regional non-affiliates.
 
     Southern and the Company are subject to the informational requirements of
the Exchange Act and in accordance therewith file reports and other information
with the Commission. Such reports and other information may be inspected and
copied at the public reference facilities maintained by the Commission at 450
Fifth Street, N.W., Washington, D.C. 20549; 500 West Madison Street, Suite 1400,
Chicago, Illinois 60661-2511; and Seven World Trade Center, Suite 1300, New
York, New York 10048. Copies of such
 
                                       29
<PAGE>   30
 
material can be obtained from the Public Reference Section of the Commission,
450 Fifth Street, N.W., Washington, D.C. 20549, at prescribed rates. The
Commission maintains a Web site at http://www.sec.gov containing reports, proxy
and information statements and other information regarding registrants that file
electronically with the Commission, including Southern and the Company. Reports,
proxy materials and other information about Southern and the Company are also
available at the offices of the New York Stock Exchange, 20 Broad Street, New
York, New York 10005. In connection with the Offer Southern has filed an Issuer
Tender Offer Statement on Schedule 13E-4 with the Commission that includes
certain additional information relating to the Offer. Southern's Schedule 13E-4
will not be available at the Commission's regional offices.
 
                        SUMMARY OF FINANCIAL INFORMATION
 
     Set forth below is certain historical financial information of the Company.
The historical financial information (other than the ratios of earnings to fixed
charges) was derived from the audited financial statements included in the
Company's Annual Report on Form 10-K for the year ended December 31, 1996 and
from the unaudited financial statements included in the Company's Quarterly
Report on Form 10-Q for the period ended June 30, 1997.
 
                        CONDENSED INCOME STATEMENT DATA
 
<TABLE>
<CAPTION>
                                                        YEAR ENDED          SIX MONTHS ENDED
                                                       DECEMBER 31,             JUNE 30,
                                                    -------------------   --------------------
                                                      1996       1995       1997        1996
                                                    --------   --------   --------    --------
                                                      (THOUSANDS OF DOLLARS, EXCEPT RATIOS)
                                                                              (UNAUDITED)
<S>                                                 <C>        <C>        <C>         <C>
Operating Revenues................................  $544,029   $516,553   $245,818    $263,703
Operating Income..................................    77,071     78,610     36,472      35,765
Net Income........................................    57,662     57,430     25,712      25,544
Dividends on Preferred Stock......................     4,899      4,899      2,449       2,449
Net Income after Dividends on Preferred Stock.....    52,723     52,531     23,263      23,095
Ratio of Earnings to Fixed Charges................      4.86       4.61       4.97(1)     4.69(1)
</TABLE>
 
- ---------------
 
(1) Ratio for the twelve months ended June 30.
 
                                       30
<PAGE>   31
 
                          CONDENSED BALANCE SHEET DATA
 
<TABLE>
<CAPTION>
                                                      AT DECEMBER 31,             AT JUNE 30,
                                                  -----------------------   -----------------------
                                                     1996         1995         1997         1996
                                                  ----------   ----------   ----------   ----------
                                                               (THOUSANDS OF DOLLARS)
                                                                                  (UNAUDITED)
<S>                                               <C>          <C>          <C>          <C>
ASSETS:
Net Utility Plant In Service....................  $  957,099   $  935,019   $  949,154   $  930,883
Construction Work in Progress...................      35,100       41,210       44,304       51,473
Cash and Cash Equivalents.......................       7,058       12,641       12,794        1,591
Other Current Assets............................      96,650      103,809      100,219      106,856
Other Assets....................................      46,420       56,274       48,142       60,749
                                                  ----------   ----------   ----------   ----------
                                                  $1,142,327   $1,148,953   $1,154,613   $1,151,552
                                                  ==========   ==========   ==========   ==========
LIABILITIES:
Common Equity...................................  $  383,734   $  374,884   $  383,597   $  376,706
Cumulative Preferred Stock (less amounts due
  within one year)..............................      74,414       74,414       39,414       74,414
Company Obligated Mandatorily Redeemable
  Preferred Securities of Subsidiary Trust
  Holding Company Junior Subordinated Notes.....          --           --       35,000           --
Long-Term Debt (less amounts due within one
  year).........................................     326,379      288,820      291,532      276,235
Current Liabilities.............................     105,579      160,787      152,504      176,831
Other Liabilities...............................     252,221      250,048      252,566      247,366
                                                  ----------   ----------   ----------   ----------
                                                  $1,142,327   $1,148,953   $1,154,613   $1,151,552
                                                  ==========   ==========   ==========   ==========
</TABLE>
 
     The financial statements of Southern and related information included in
its Annual Report on Form 10-K for the year ended December 31, 1996, its
Quarterly Reports on Form 10-Q for the quarters ended March 31, 1997 and June
30, 1997 and its Current Reports on Form 8-K dated February 12, 1997, June 5,
1997 and July 2, 1997, each as filed with the Commission, are hereby
incorporated by reference. The financial statements of the Company and related
information included in its Annual Report on Form 10-K for the year ended
December 31, 1996, its Quarterly Reports on Form 10-Q for the quarters ended
March 31, 1997 and June 30, 1997 and its Current Reports on Form 8-K dated
February 12, 1997 and February 20, 1997, each as filed with the Commission, are
hereby incorporated by reference. All documents subsequently filed by Southern
and the Company pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange
Act after the date of this Offer to Purchase and Proxy Statement and prior to
the Expiration Date (or any extension thereof) shall be deemed to be
incorporated by reference in this Offer to Purchase and Proxy Statement and to
be a part hereof from the date of filing of such documents. Any statement
contained in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded for purposes of this Offer
to Purchase and Proxy Statement to the extent that a statement contained herein
or in any other subsequently filed document which is deemed to be incorporated
by reference herein modifies or supersedes such statement. Any such statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Offer to Purchase and Proxy Statement.
 
     Southern and the Company each will provide without charge to each person to
whom a copy of this Offer to Purchase and Proxy Statement has been delivered, on
the written or oral request of any such person, a copy of any or all of its
documents described above which have been incorporated by reference in this
Offer to Purchase and Proxy Statement, other than exhibits to such documents.
Such requests should be directed, in the case of Southern, to Tommy Chisholm,
Secretary, The Southern Company, 270 Peachtree Street, N.W., Atlanta, Georgia
30303, telephone: (770) 393-0650 and, in the case of the Company, to Secretary,
Mississippi Power Company, 2992 West Beach, Gulfport, Mississippi 39501,
telephone: (601) 864-1211. The information relating to Southern and the Company
contained in this Offer to Purchase and Proxy Statement does not purport to be
comprehensive and should be read together with the information contained in the
documents incorporated by reference.
 
                                       31
<PAGE>   32
 
                                 MISCELLANEOUS
 
     The Offer is not being made to, nor will Southern accept tenders from,
owners of Shares in any jurisdiction in which the Offer or its acceptance would
not be in compliance with the laws of such jurisdiction. Southern is not aware
of any jurisdiction where the making of the Offer or the tender of Shares would
not be in compliance with applicable law. If Southern becomes aware of any
jurisdiction where the making of the Offer or the tender of Shares is not in
compliance with any applicable law, Southern will make a good faith effort to
comply with such law. If, after such good faith effort, Southern cannot comply
with such law, the Offer will not be made to (nor will tenders be accepted from
or on behalf of) the owners of Shares residing in such jurisdiction. In any
jurisdiction in which the securities, blue sky or other laws require the Offer
to be made by a licensed broker or dealer, the Offer will be deemed to be made
on Southern's behalf by one or more registered brokers or dealers licensed under
the laws of such jurisdiction.
 
                                          THE SOUTHERN COMPANY
                                          MISSISSIPPI POWER COMPANY
 
                                       32
<PAGE>   33
 
                                                                      APPENDIX A
 
       PROVISIONS OF THE CHARTER TO BE DELETED BY THE PROPOSED AMENDMENT
 
     Unless otherwise defined, capitalized terms used herein are used as defined
in the Charter.
 
THE DEBT LIMITATION PROVISION
 
     Subparagraph (F)(b) of Paragraph FOURTH under "General Provisions" of the
"Preferred Stock" section of the Charter states:
 
          "So long as any shares of the preferred stock are outstanding, the
     corporation shall not, without the affirmative vote in favor thereof of the
     holders of at least a majority of the shares of preferred stock at the time
     outstanding,
 
             (b)(i) issue or assume any unsecured notes, debentures or other
        securities representing unsecured debt (other than for the purpose of
        refunding or renewing outstanding unsecured securities issued or assumed
        by the corporation resulting in equal or longer maturities or redeeming
        or otherwise retiring all outstanding shares of the preferred stock or
        of any kind of stock over which the preferred stock does not have
        preference as to the payment of dividends and as to assets) if
        immediately after such issue or assumption (1) the total outstanding
        principal amount of all unsecured notes, debentures or other securities
        representing unsecured debt of the corporation will thereby exceed 20%
        of the aggregate of all existing secured debt of the corporation and the
        capital stock, premiums thereon and surplus of the corporation as stated
        on its books; or (2) the total outstanding principal amount of all
        unsecured notes, debentures or other securities representing unsecured
        debt of the corporation of maturities of less than ten years would
        exceed 10% of such aggregate;
 
             (ii) for the purpose of sub-paragraph (i) above, the payment due
        upon the maturity of unsecured debt having an original single maturity
        in excess of 10 years or the payment due upon the final maturity of any
        unsecured serial debt which had original maturities in excess of ten
        years shall not be regarded as unsecured debt of a maturity of less than
        10 years until such payment shall be required to be made within 3
        years."
 
THE MERGER PROVISION
 
     Subparagraph (F)(a) of Paragraph FOURTH under "General Provisions" of the
"Preferred Stock" section of the Charter states:
 
          "So long as any shares of the preferred stock are outstanding, the
     corporation shall not, without the affirmative vote in favor thereof of the
     holders of at least a majority of the shares of preferred stock at the time
     outstanding,
 
          (a) sell, lease or exchange all or substantially all of its property
     or merge or consolidate with or into any other corporation or corporations,
     unless such sale, lease, exchange, merger or consolidation, or the issuance
     and assumption of all securities to be issued or assumed in connection
     therewith, shall have been ordered, approved or permitted by the Securities
     and Exchange Commission, or by any successor commission thereto, under the
     Public Utility Holding Company Act of 1935; provided, however, that nothing
     in this paragraph contained shall authorize any such sale, lease, exchange,
     merger or consolidation by the vote of the holders of a less number of
     shares of the preferred stock, or of any other class of stock, or of all
     classes of stock, than is required for any such sale, lease, exchange,
     merger or consolidation by the laws of the State of Mississippi at the time
     applicable thereto."
 
                                       A-1
<PAGE>   34
 
THE COMMON STOCK DIVIDEND PROVISION
 
     The relevant provision of Subparagraph (B) of Paragraph FOURTH under
"General Provisions" of the "Preferred Stock" section of the Charter states:
 
          "So long as any shares of the preferred stock are outstanding, the
     payment of dividends on the common stock (other than dividends payable in
     common stock) and the making of any distribution of assets to holders of
     common stock by purchase of shares or otherwise (each of such actions being
     herein embraced within the term "payment of common stock dividends") shall
     be subject to the following limitations:
 
             (a) If and so long as the ratio of the aggregate of the par value
        of, or stated capital represented by, the outstanding shares of common
        stock (including premiums on the common stock but excluding premiums on
        the preferred stock) and of the surplus of the corporation to the total
        capitalization and surplus of the corporation at the end of a period of
        twelve consecutive calendar months within the fourteen calendar months
        immediately preceding the calendar month in which the proposed payment
        of common stock dividends is to be made (which period is hereinafter
        referred to as the "base period"), adjusted to reflect the proposed
        payment of common stock dividends (which ratio is hereinafter referred
        to as the "capitalization ratio"), is less than 20%, the payment of
        common stock dividends, including the proposed payment, during the
        twelve calendar months period ending with and including the calendar
        month in which the proposed payment is to be made shall not exceed 50%
        of the net income of the corporation available for the payment of
        dividends on the common stock during the base period;
 
             (b) If and so long as the capitalization ratio is 20% or more but
        less than 25%, the payment of common stock dividends, including the
        proposed payment, during the twelve calendar months period ending with
        and including the calendar month in which the proposed payment is to be
        made shall not exceed 75% of the net income of the corporation available
        for the payment of dividends on the common stock during the base period;
 
             (c) Except to the extent permitted under paragraphs (a) and (b)
        above, the corporation shall not make any payment of common stock
        dividends which would reduce the capitalization ratio to less than 25%.
 
     For the purpose of the foregoing provisions, the following terms shall have
the following meanings:
 
          (1) The term "net income of the corporation available for the payment
     of dividends on the common stock" shall mean for any period the balance
     remaining after deducting from the total gross revenues of the corporation
     from all sources during such period the following:
 
             (a) all operating expenses and taxes, including charges to income
        for general taxes and for federal and state taxes measured by income,
        for retirement or depreciation reserve and for amortization or other
        disposition of amounts, if any, classified as amounts in excess of
        original cost of utility plant; (b) the greater of (i) the amount, if
        any, by which the aggregate of the charges to income during the period
        in question for repairs, maintenance and provision for depreciation is
        less than the maintenance and replacement requirement embodied in the
        Indenture or any indenture supplemental thereto, succeeding the same or
        in substitution therefor, and (ii) the amount, if any, by which the
        charges to income during the period in question as provision for
        depreciation is less than the replacement requirement embodied in
        Section 4 of the Supplemental Indenture dated as of June 1, 1964
        supplemental to the Indenture, or any requirement succeeding the same or
        in substitution therefor; (c) all interest charges and other income
        deductions, including charges to income for amortization of debt
        discount, premium and expense and preferred stock premium and expense;
        and (d) all dividends applicable to the period in question on stock
        having preference over the common stock as to the payment of dividends.
 
          (2) The term "total capitalization" shall mean the aggregate of the
     principal amount of all outstanding indebtedness of the corporation
     maturing more than twelve months after the date of issue
 
                                       A-2
<PAGE>   35
 
     thereof, plus the par value of, or stated capital represented by, the
     outstanding shares of all classes of stock of the corporation, including
     any premiums on capital stock.
 
          (3) The term "surplus" shall include capital surplus, earned surplus
     and any other surplus of the corporation, adjusted to eliminate (i) any
     amounts which may then be classified by the corporation on its books as
     amounts in excess of the original cost of utility plant and which are not
     provided by reserve, (ii) any items set forth on the asset side of the
     balance sheet of the corporation as a result of accounting convention, such
     as unamortized debt discount and expense and preferred stock expense,
     unless any such amount or item, as the case may be, is being amortized or
     is being provided for by reserve, and (iii) the excess, if any, of the
     aggregate amount payable in event of involuntary liquidation of the
     corporation upon all series of preferred stock over the sum of (a) the
     aggregate of the par value of, or stated capital represented by, such
     shares and (b) any premiums thereon."
 
                                       A-3
<PAGE>   36
 
                                                                      APPENDIX B
 
             ARTICLE 13 OF THE MISSISSIPPI BUSINESS CORPORATION ACT
 
                               DISSENTERS' RIGHTS
 
                                  SUBARTICLE A
 
                 RIGHT TO DISSENT AND OBTAIN PAYMENT FOR SHARES
 
SEC. 79-4-13.01.  DEFINITIONS.
 
     In this article:
 
          (1) "Corporation" means the issuer of the shares held by a dissenter
     before the corporate action, or the surviving or acquiring corporation by
     merger or share exchange of that issuer.
 
          (2) "Dissenter" means a shareholder who is entitled to dissent from
     corporate action under Section 79-4-13.02 and who exercises that right when
     and in the manner required by Sections 79-4-13.20 through 79-4-13.28.
 
          (3) "Fair value," with respect to a dissenter's shares, means the
     value of the shares immediately before the effectuation of the corporate
     action to which the dissenter objects, excluding any appreciation or
     depreciation in anticipation of the corporate action unless exclusion would
     be inequitable.
 
          (4) "Interest" means interest from the effective date of the corporate
     action until the date of payment, at the average rate currently paid by the
     corporation on its principal bank loans or, if none, at a rate that is fair
     and equitable under all the circumstances.
 
          (5) "Record shareholder" means the person in whose name shares are
     registered in the records of a corporation or the beneficial owner of
     shares to the extent of the rights granted by a nominee certificate on file
     with a corporation.
 
          (6) "Beneficial shareholder" means the person who is a beneficial
     owner of shares held in a voting trust or by a nominee as the record
     shareholder.
 
          (7) "Shareholder" means the record shareholder or the beneficial
     shareholder.
 
SEC. 79-4-13.02.  RIGHT TO DISSENT.
 
     (a) A shareholder is entitled to dissent from, and obtain payment of the
fair value of his shares in the event of, any of the following corporate
actions:
 
          (1) Consummation of a plan of merger to which the corporation is a
     party (i) if shareholder approval is required for the merger by Section
     79-4-11.03 or the articles of incorporation and the shareholder is entitled
     to vote on the merger, or (ii) if the corporation is a subsidiary that is
     merged with its parent under Section 79-4-11.04;
 
          (2) Consummation of a plan of share exchange to which the corporation
     is a party as the corporation whose shares will be acquired, if the
     shareholder is entitled to vote on the plan;
 
          (3) Consummation of a sale or exchange of all, or substantially all,
     of the property of the corporation other than in the usual and regular
     course of business, if the shareholder is entitled to vote on the sale or
     exchange, including a sale in dissolution, but not including a sale
     pursuant to court order or a sale for cash pursuant to a plan by which all
     or substantially all of the net proceeds of the sale will be distributed to
     the shareholders within one (1) year after the date of sale;
 
                                       B-1
<PAGE>   37
 
          (4) An amendment of the articles of incorporation that materially and
     adversely affects rights in respect of a dissenter's shares because it:
 
             (i) Alters or abolishes a preferential right of the shares;
 
             (ii) Creates, alters or abolishes a right in respect of redemption,
        including a provision respecting a sinking fund for the redemption or
        repurchase, of the shares;
 
             (iii) Alters or abolishes a preemptive right of the holder of the
        shares to acquire shares or other securities;
 
             (iv) Excludes or limits the right of the shares to vote on any
        matter, or to cumulate votes, other than a limitation by dilution
        through issuance of shares or other securities with similar voting
        rights; or
 
             (v) Reduces the number of shares owned by the shareholder to a
        fraction of a share if the fraction share so created is to be acquired
        for cash under Section 79-4-6.04; or
 
          (5) Any corporate action taken pursuant to a shareholder vote to the
     extent the articles of incorporation, bylaws or a resolution of the board
     of directors provides that voting or nonvoting shareholders are entitled to
     dissent and obtain payment for their shares.
 
     (b) Nothing in subsection (a)(4) shall entitle a shareholder of a
corporation to dissent and obtain payment for his shares as a result of an
amendment of the articles of incorporation exclusively for the purpose of either
(i) making such corporation subject to application of the Mississippi Control
Share Act, or (ii) making such act inapplicable to a control share acquisition
of such corporation.
 
     (c) A shareholder entitled to dissent and obtain payment for his shares
under this article may not challenge the corporate action creating his
entitlement unless the action is unlawful or fraudulent with respect to the
shareholder or the corporation.
 
SEC. 79-4-13.03.  DISSENT BY NOMINEES AND BENEFICIAL OWNERS.
 
     (a) A record shareholder may assert dissenters' rights as to fewer than all
the shares registered in his name only if he dissents with respect to all shares
beneficially owned by any one person and notifies the corporation in writing of
the name and address of each person on whose behalf he asserts dissenters'
rights. The rights of a partial dissenter under this subsection are determined
as if the shares as to which he dissents and his other shares were registered in
the names of different shareholders.
 
     (b) A beneficial shareholder may assert dissenters' rights as to shares
held on his behalf only if:
 
          (1) He submits to the corporation the record shareholder's written
     consent to the dissent not later than the time the beneficial shareholder
     asserts dissenters' rights; and
 
          (2) He does so with respect to all shares of which he is the
     beneficial shareholder or over which he has power to direct the vote.
 
                                  SUBARTICLE B
 
                  PROCEDURE FOR EXERCISE OF DISSENTERS' RIGHTS
 
SEC. 79-4-13.20.  NOTICE OF DISSENTERS' RIGHTS.
 
     (a) If proposed corporate action creating dissenters' rights under Section
79-4-13.02 is submitted to a vote at a shareholders' meeting, the meeting notice
must state that shareholders are or may be entitled to assert dissenters' rights
under this article and be accompanied by a copy of this article.
 
     (b) If corporate action creating dissenters' rights under Section
79-4-13.02 is taken without a vote of shareholders, the corporation shall notify
in writing all shareholders entitled to assert dissenters' rights that the
action was taken and send them the dissenters' notice described in Section
79-4-13.22.
 
                                       B-2
<PAGE>   38
 
SEC. 79-4-13.21.  NOTICE OF INTENT TO DEMAND PAYMENT.
 
     (a) If proposed corporate action creating dissenters' rights under Section
79-4-13.02 is submitted to a vote at a shareholders' meeting, a shareholder who
wishes to assert dissenters' rights (1) must deliver to the corporation before
the vote is taken written notice of his intent to demand payment for his shares
if the proposed action is effectuated, and (2) must not vote his shares in favor
of the proposed action.
 
     (b) A shareholder who does not satisfy the requirement of subsection (a) is
not entitled to payment for his shares under this article.
 
SEC. 79-4-13.22.  DISSENTERS' NOTICE.
 
     (a) If proposed corporate action creating dissenters' rights under Section
79-4-13.02 is authorized at a shareholders' meeting, the corporation shall
deliver a written dissenters' notice to all shareholders who satisfied the
requirements of Section 79-4-13.21.
 
     (b) The dissenters' notice must be sent no later than ten (10) days after
the corporate action was taken, and must:
 
          (1) State where the payment demand must be sent and where and when
     certificates for certificated shares must be deposited;
 
          (2) Inform holders of uncertificated shares to what extent transfer of
     the shares will be restricted after the payment demand is received;
 
          (3) Supply a form for demanding payment that includes the date of the
     first announcement to news media or to shareholders of the terms of the
     proposed corporate action and requires that the person asserting
     dissenters' rights certify whether or not he acquired beneficial ownership
     of the shares before that date;
 
          (4) Set a date by which the corporation must receive the payment
     demand, which date may not be fewer than thirty (30) nor more than sixty
     (60) days after the date the subsection (a) notice is delivered; and
 
          (5) Be accompanied by a copy of this article.
 
SEC. 79-4-13.23.  DUTY TO DEMAND PAYMENT.
 
     (a) A shareholder sent a dissenters' notice described in Section 79-4-13.22
must demand payment, certify whether he acquired beneficial ownership of the
shares before the date required to be set forth in the dissenter's notice
pursuant to Section 79-4-13.22(b)(3), and deposit his certificates in accordance
with the terms of the notice.
 
     (b) The shareholder who demands payment and deposits his shares under
subsection (a) retains all other rights of a shareholder until these rights are
cancelled or modified by the taking of the proposed corporate action.
 
     (c) A shareholder who does not demand payment or deposit his share
certificates where required, each by the date set in the dissenters' notice, is
not entitled to payment for his shares under this article.
 
SEC. 79-4-13.24.  SHARE RESTRICTIONS.
 
     (a) The corporation may restrict the transfer of uncertificated shares from
the date the demand for their payment is received until the proposed corporate
action is taken or the restrictions released under Section 79-4-13.26.
 
     (b) The person for whom dissenters' rights are asserted as to
uncertificated shares retains all other rights of a shareholder until these
rights are cancelled or modified by the taking of the proposed corporate action.
 
                                       B-3
<PAGE>   39
 
SEC. 79-4-13.25.  PAYMENT.
 
     (a) Except as provided in Section 79-4-13.27, as soon as the proposed
corporate action is taken, or upon receipt of a payment demand, the corporation
shall pay each dissenter who complied with Section 79-4-13.23 the amount the
corporation estimates to be the fair value of his shares, plus accrued interest.
 
     (b) The payment must be accompanied by:
 
          (1) The corporation's balance sheet as of the end of a fiscal year
     ending not more than sixteen (16) months before the date of payment, an
     income statement for that year, a statement of changes in shareholders'
     equity for that year, and the latest available interim financial
     statements, if any;
 
          (2) A statement of the corporation's estimate of the fair value of the
     shares;
 
          (3) An explanation of how the interest was calculated;
 
          (4) A statement of the dissenters' right to demand payment under
     Section 79-4-13.28; and
 
          (5) A copy of this article.
 
SEC. 79-4-13.26.  FAILURE TO TAKE ACTION.
 
     (a) If the corporation does not take the proposed action within sixty (60)
days after the date set for demanding payment and depositing share certificates,
the corporation shall return the deposited certificates and release the transfer
restrictions imposed on uncertificated shares.
 
     (b) If after returning deposited certificates and releasing transfer
restrictions, the corporation takes the proposed action, it must send a new
dissenters' notice under Section 79-4-13.22 and repeat the payment demand
procedure.
 
SEC. 79-4-13.27.  AFTER-ACQUIRED SHARES.
 
     (a) A corporation may elect to withhold payment required by Section
79-4-13.25 from a dissenter unless he was the beneficial owner of the shares
before the date set forth in the dissenters' notice as the date of the first
announcement to news media or to shareholders of the terms of the proposed
corporate action.
 
     (b) To the extent the corporation elects to withhold payment under
subsection (a), after taking the proposed corporate action, it shall estimate
the fair value of the shares, plus accrued interest, and shall pay this amount
to each dissenter who agrees to accept it in full satisfaction of his demand.
The corporation shall send with its offer a statement of its estimate of the
fair value of the shares, an explanation of how the interest was calculated and
a statement of the dissenter's right to demand payment under Section 79-4-13.28.
 
SEC. 79-4-13.28.  PROCEDURE IF SHAREHOLDER DISSATISFIED WITH PAYMENT OR OFFER.
 
     (a) A dissenter may notify the corporation in writing of his own estimate
of the fair value of his shares and amount of interest due, and demand payment
of his estimate (less any payment under Section 79-4-13.25), or reject the
corporation's offer under Section 79-4-13.27 and demand payment of the fair
value of his shares and interest due, if;
 
          (1) The dissenter believes that the amount paid under Section
     79-4-13.25 or offered under Section 79-4-13.27 is less than the fair value
     of his shares or that the interest due is incorrectly calculated;
 
          (2) The corporation fails to make payment under Section 79-4-13.25
     within sixty (60) days after the date set for demanding payment; or
 
          (3) The corporation, having failed to take the proposed action, does
     not return the deposited certificates or release the transfer restrictions
     imposed on uncertificated shares within sixty (60) days after the date set
     for demanding payment.
 
                                       B-4
<PAGE>   40
 
     (b) A dissenter waives his right to demand payment under this section
unless he notifies the corporation of his demand in writing under subsection (a)
within thirty (30) days after the corporation made or offered payment for his
shares.
 
                                  SUBARTICLE C
 
                          JUDICIAL APPRAISAL OF SHARES
 
SEC. 79-4-13.30.  COURT ACTION.
 
     (a) If a demand for payment under Section 79-4-13.28 remains unsettled, the
corporation shall commence a proceeding within sixty (60) days after receiving
the payment demand and petition the court to determine the fair value of the
shares and accrued interest. If the corporation does not commence the proceeding
within the 60-day period, it shall pay each dissenter whose demand remains
unsettled the amount demanded.
 
     (b) The corporation shall commence the proceeding in the chancery court of
the county where a corporation's principal office (or, if none in this state,
its registered office) is located. If the corporation is a foreign corporation
without a registered office in this state, it shall commence the proceeding in
the county in this state where the registered office of the domestic corporation
merged with or whose shares were acquired by the foreign corporation was
located.
 
     (c) The corporation shall make all dissenters (whether or not residents of
this state) whose demands remain unsettled parties to the proceeding as in an
action against their shares and all parties must be served with a copy of the
petition. Nonresidents may be served by registered or certified mail or by
publication as provided by law.
 
     (d) The jurisdiction of the court in which the proceeding is commenced
under subsection (b) is plenary and exclusive. The court may appoint one or more
persons as appraisers to receive evidence and recommend decision on the question
of fair value. The appraisers have the powers described in the order appointing
them, or in any amendment to it. The dissenters are entitled to the same
discovery rights as parties in other civil proceedings.
 
     (e) Each dissenter made a party to the proceeding is entitled to judgment
(1) for the amount, if any, by which the court finds the fair value of his
shares, plus interest, exceeds the amount paid by the corporation, or (2) for
the fair value, plus accrued interest, of his after-acquired shares for which
the corporation elected to withhold payment under Section 79-4-13.27.
 
SEC. 79-4-13.31.  COURT COSTS AND COUNSEL FEES.
 
     (a) The court in an appraisal proceeding commenced under Section 79-4-13.30
shall determine all costs of the proceeding, including the reasonable
compensation and expenses of appraisers appointed by the court. The court shall
assess the costs against the corporation, except that the court may assess costs
against all or some of the dissenters, in amounts the court finds equitable, to
the extent the court finds the dissenters acted arbitrarily, vexatiously or not
in good faith in demanding payment under Section 79-4-13.28.
 
     (b) The court may also assess the fees and expenses of counsel and experts
for the respective parties, in amounts the court finds equitable:
 
          (1) Against the corporation and in favor of any or all dissenters if
     the court finds the corporation did not substantially comply with the
     requirements of Sections 79-4-13.20 through 79-4-13.28; or
 
          (2) Against either the corporation or a dissenter, in favor of any
     other party, if the court finds that the party against whom the fees and
     expenses are assessed acted arbitrarily, vexatiously or not in good faith
     with respect to the rights provided by this article.
 
     (c) If the court finds that the services of counsel for any dissenter were
of substantial benefit to other dissenters similarly situated, and that the fees
for those services should not be assessed against the corporation, the court may
award to these counsel reasonable fees to be paid out of the amounts awarded the
dissenters who were benefited.
 
                                       B-5
<PAGE>   41
 
     Facsimile copies of the Letter of Transmittal and Proxy will not be
accepted. The Letter of Transmittal and Proxy and, if applicable, certificates
for Shares should be sent or delivered by each tendering or voting Preferred
Shareholder of the Company or his or her broker, dealer, bank or trust company
to the Depositary at one of its addresses set forth below.
                                THE DEPOSITARY:
 
                              THE BANK OF NEW YORK
 
<TABLE>
<C>                                                  <C>
                     By Mail:                                   By Hand or Overnight Courier:
           Tender & Exchange Department                         Tender & Exchange Department
                  P.O. Box 11248                                     101 Barclay Street
               Church Street Station                             Receive and Deliver Window
           New York, New York 10286-1248                          New York, New York 10286
</TABLE>
 
     Any questions or requests for assistance may be directed to the Information
Agent or the Dealer Manager at their respective telephone numbers and addresses
listed below. Requests for additional copies of this Offer to Purchase and Proxy
Statement, the Letter of Transmittal and Proxy or other tender offer or proxy
materials may be directed to the Information Agent, and such copies will be
furnished promptly at the Company's expense. Preferred Shareholders may also
contact their local broker, dealer, commercial bank or trust company for
assistance concerning the Offer.
 
                             THE INFORMATION AGENT:
                    CORPORATE INVESTOR COMMUNICATIONS, INC.
                               111 Commerce Road
                          Carlstadt, New Jersey 07072
                           (888) 881-0526 (toll free)
                                       or
                             Banks and Brokers call
                                 (888) 349-2003
 
                              THE DEALER MANAGER:
                              MERRILL LYNCH & CO.
                             World Financial Center
                                250 Vesey Street
                            New York, New York 10281
                           1-888-ML4-TNDR (toll free)
                                (1-800-654-8637)
 
                                   ATTENTION
                    SHAREHOLDERS WHO HAVE LOST CERTIFICATES:
                     Call SCS Stockholder Services collect
                         at 404-506-0967 for assistance

<PAGE>   1
 
                                                                       4.40% MPC
 
                        LETTER OF TRANSMITTAL AND PROXY
                                  TO ACCOMPANY
                     SHARES OF 4.40% SERIES PREFERRED STOCK
                             CUSIP NUMBER 605417203
                                       OF
 
                           MISSISSIPPI POWER COMPANY
              TENDERED PURSUANT TO THE OFFER TO PURCHASE FOR CASH
                                       BY
 
                              THE SOUTHERN COMPANY
                   DATED NOVEMBER 3, 1997, FOR PURCHASE AT A
                       PURCHASE PRICE OF $87.13 PER SHARE
 
                                     AND/OR
 
                     VOTED PURSUANT TO THE PROXY STATEMENT
                                       OF
 
                           MISSISSIPPI POWER COMPANY

       THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK
         CITY TIME, ON DECEMBER 10, 1997, UNLESS THE OFFER IS EXTENDED.
 
           THE PROXY CONTAINED IN THIS DOCUMENT IS IN RESPECT OF THE
        SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 10, 1997,
        OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR POSTPONED.
 
                      TO: THE BANK OF NEW YORK, DEPOSITARY
 
<TABLE>
<S>                                                 <C>
                     BY MAIL:                                 BY HAND OR OVERNIGHT COURIER:
           Tender & Exchange Department                        Tender & Exchange Department
                  P.O. Box 11248                                    101 Barclay Street
              Church Street Station                             Receive and Deliver Window
          New York, New York 10286-1248                          New York, New York 10286
</TABLE>
 
                NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)
(PLEASE FILL IN EXACTLY AS NAME(S) AND ADDRESS(ES) APPEAR(S) ON CERTIFICATE(S))

 
     IF YOU HAVE ANY QUESTIONS, HAVE NOT RECEIVED THE OFFER TO PURCHASE AND
PROXY STATEMENT OR OTHER DOCUMENTS PERTAINING TO THE OFFER, OR NEED ASSISTANCE
IN COMPLETING THIS LETTER OF TRANSMITTAL AND PROXY, PLEASE CONTACT CORPORATE
INVESTOR COMMUNICATIONS, INC., THE INFORMATION AGENT, AT TELEPHONE (888)
881-0526 (TOLL FREE).
<PAGE>   2
 
     PREFERRED SHAREHOLDERS (INCLUDING PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES
SUBSEQUENT TO THE RECORD DATE) WILL NOT BE ABLE TO VALIDLY TENDER THEIR SHARES
UNLESS THEY HAVE SUBMITTED A DULY COMPLETED, VALID AND UNREVOKED PROXY
INDICATING THEIR VOTE FOR THE PROPOSED AMENDMENT OR INDICATE IN THE ACCOMPANYING
PROXY THEIR INTENTION TO VOTE FOR THE PROPOSED AMENDMENT AT THE SPECIAL MEETING.
THE SOUTHERN COMPANY ("SOUTHERN") WILL NOT BE REQUIRED TO ACCEPT FOR PAYMENT OR
PAY FOR ANY SHARES TENDERED IF THE PROPOSED AMENDMENT IS NOT APPROVED AND
ADOPTED AT THE SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 10, 1997,
OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR POSTPONED (THE "SPECIAL
MEETING"). PREFERRED SHAREHOLDERS HAVE THE RIGHT TO VOTE FOR THE PROPOSED
AMENDMENT REGARDLESS OF WHETHER THEY TENDER THEIR SHARES BY CASTING THEIR VOTE
AND SIGNING THE PROXY CONTAINED WITHIN THIS LETTER OF TRANSMITTAL AND PROXY OR
BY VOTING IN PERSON AT THE SPECIAL MEETING. IF THE PROPOSED AMENDMENT IS
APPROVED AND ADOPTED, MISSISSIPPI POWER COMPANY (THE "COMPANY") WILL MAKE A
SPECIAL CASH PAYMENT TO EACH PREFERRED SHAREHOLDER WHO VOTED IN FAVOR OF THE
PROPOSED AMENDMENT, PROVIDED THAT SUCH HOLDER'S SHARES ARE NOT TENDERED PURSUANT
TO THE OFFER.
 
     HOLDERS WHO PURCHASE OR WHOSE PURCHASE SETTLES OR IS REGISTERED AFTER THE
CLOSE OF BUSINESS ON NOVEMBER 6, 1997 (THE "RECORD DATE") AND WHO WISH TO TENDER
IN THE OFFER MUST ARRANGE WITH THEIR SELLER TO RECEIVE A DULY COMPLETED, VALID
AND UNREVOKED PROXY (WHICH MAY BE IN THE FORM OF AN IRREVOCABLE ASSIGNMENT OF
PROXY AS SET FORTH IN THIS LETTER OF TRANSMITTAL AND PROXY) FROM THE HOLDER OF
RECORD OF SUCH SHARES ON THE RECORD DATE. IN ORDER TO FACILITATE RECEIPT OF
PROXIES, SHARES SHALL, DURING THE PERIOD WHICH COMMENCES NOVEMBER 4, 1997 (TWO
BUSINESS DAYS PRIOR TO THE RECORD DATE) AND WHICH WILL END AT THE CLOSE OF
BUSINESS ON THE EXPIRATION DATE (AS DEFINED IN THE OFFER TO PURCHASE AND PROXY
STATEMENT), TRADE IN THE OVER-THE-COUNTER MARKET WITH A PROXY PROVIDING THE
TRANSFEREE WITH THE RIGHT TO VOTE SUCH ACQUIRED SHARES IN THE PROXY
SOLICITATION.
 
     NOTE: SIGNATURES MUST BE PROVIDED HEREIN. PLEASE READ THE ACCOMPANYING
                            INSTRUCTIONS CAREFULLY.
 
     The undersigned hereby appoints Dwight H. Evans, Michael W. Southern and
Wayne Boston, or any of them, as proxies, each with the power to appoint his or
her substitute, and hereby authorizes them to represent and to vote as
designated hereunder and in their discretion with respect to any other business
properly brought before the Special Meeting all the shares of preferred stock of
the Company which the undersigned is entitled to vote at the Special Meeting or
any adjournment(s) or postponement(s) thereof.
 
     NOTE: IF YOU ARE VOTING BUT NOT TENDERING SHARES, DO NOT SEND ANY SHARE
CERTIFICATES WITH THIS LETTER OF TRANSMITTAL AND PROXY.
 
     THIS LETTER OF TRANSMITTAL AND PROXY IS SOLICITED ON BEHALF OF THE BOARD OF
DIRECTORS OF THE COMPANY. The proxy contained herein, when properly executed,
will be voted in the manner directed herein by the undersigned shareholder(s).
If no direction is made, the proxy will be voted FOR Item 1. An abstention is
the equivalent of a vote AGAINST the Proposed Amendment.
 
     PREFERRED SHAREHOLDERS WHO WISH TO TENDER THEIR SHARES MUST VOTE FOR ITEM
1.
 
     Indicate your vote by an (X). The Board of Directors recommends voting FOR
Item 1.
 
     HOLDERS OF SHARES WHO WISH TO TENDER THEIR SHARES MUST VOTE FOR THE
PROPOSED AMENDMENT EITHER BY SUBMITTING THIS PROXY OR BY VOTING AT THE SPECIAL
MEETING.
 
ITEM 1.
 
     To remove from the Company's Articles of Incorporation, as amended, (i)
Subparagraph F(b) of Paragraph FOURTH under "General Provisions" of the
"Preferred Stock" section, a provision restricting the amount of securities
representing unsecured indebtedness issuable by the Company, (ii) Subparagraph
(F)(a) of Paragraph FOURTH under "General Provisions" of the "Preferred Stock"
section, a provision which requires the vote of the holders of at least a
majority of the total voting power of the Company's outstanding preferred stock
to approve the sale of all or substantially all of the Company's property and
mergers or consolidations that have not been approved under the Public Utility
Holding Company Act of 1935, as amended, and (iii) Subparagraph (B) (except the
first paragraph therein) of Paragraph
 
                                        2
<PAGE>   3
 
FOURTH under "General Provisions" of the "Preferred Stock" section, a provision
restricting the ability of the Company to pay dividends on its common stock in
the event that its common equity capitalization falls below certain levels.
 
                  [ ] FOR       [ ] AGAINST       [ ] ABSTAIN
 
     SHARES REPRESENTED BY ALL PROPERLY EXECUTED PROXIES WILL BE VOTED IN
ACCORDANCE WITH INSTRUCTIONS APPEARING ON THIS PROXY. IN THE ABSENCE OF SPECIFIC
INSTRUCTIONS, PROXIES WILL BE VOTED IN ACCORDANCE WITH THE RECOMMENDATIONS OF
THE BOARD OF DIRECTORS, AND IN THE DISCRETION OF THE PROXY HOLDERS AS TO ANY
OTHER MATTERS THAT MAY PROPERLY COME BEFORE THE SPECIAL MEETING.
 
     Any holder of Shares held of record on the Record Date in the name of
another holder must establish to the satisfaction of the Company its entitlement
to exercise or transfer this Proxy. This will ordinarily require an assignment
by such record holders in blank or, if not in blank, to and from each successive
transferee, including the holder, with each signature guaranteed by an Eligible
Institution. A form of irrevocable assignment of proxy has been provided herein.
 
Please check box if you plan to attend the Special Meeting.  [ ]
 

                            SIGNATURE(S) OF OWNER(S)
 
X
  ------------------------------------------------------------------------------
 
X
  ------------------------------------------------------------------------------
Dated:                                                                    , 1997
       ------------------------------------------------------------------
Name(s):
        ------------------------------------------------------------------------
                                 (PLEASE PRINT)
Capacity (full title):
                      ----------------------------------------------------------
Address:
          ----------------------------------------------------------------------
                               (INCLUDE ZIP CODE)

DAYTIME Area Code and Telephone No.:
                                     -------------------------------------------
 
(Must be signed by the registered holder(s) exactly as name(s) appear(s) on the
stock certificates or on a security position listing or by person(s) authorized
to become registered holder(s) by certificates and documents transmitted
herewith. If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation or other person acting in a fiduciary
or representative capacity, please set forth full title and see Instruction 5.)

 
                                        3
<PAGE>   4
 
PLEASE COMPLETE:
 
<TABLE>
<CAPTION>
                                             DESCRIPTION OF SHARES TENDERED
                 (IF TENDERING SHARES, PLEASE FILL IN EXACTLY AS INFORMATION APPEARS ON CERTIFICATE(S))
                                      (ATTACH ADDITIONAL SIGNED LIST IF NECESSARY)
                                                                                                   NUMBER OF SHARES NOT
                                                    TOTAL NUMBER OF SHARES                          TENDERED BUT AS TO
                                                        REPRESENTED BY        NUMBER OF SHARES     WHICH PROXIES GIVEN
              CERTIFICATE NUMBER(S)*                   CERTIFICATE(S)*           TENDERED**                ONLY
<S>                                                 <C>                    <C>                    <C>
  * Need not be completed by shareholders tendering by book-entry transfer.
 ** Unless otherwise indicated, it will be assumed that all Shares represented by any certificates delivered to the
    Depositary are being tendered. See Instruction 4. You must vote for the Proposed Amendment with respect to any
    Shares tendered.
</TABLE>
 
      If any of your certificate(s) for Shares have been lost, stolen or
 destroyed, please call the Company's shareholder services department ("SCS
 Stockholder Services") collect at 404-506-0967. You may need to complete an
 Affidavit of Loss with respect to the lost certificate(s) (which will be
 provided by SCS Stockholder Services) and payment of an indemnity bond premium
 fee may be required.
 
PLEASE COMPLETE IF APPLICABLE:
                           GUARANTEE OF SIGNATURE(S)
                           (SEE INSTRUCTIONS 1 AND 5)
 
 Authorized Signature:
 
 Name:
       -----------------------------------------------------------------------
 
 Name of Firm:
               ---------------------------------------------------------------
 
 Address of Firm:
                  ------------------------------------------------------------
 
 -----------------------------------------------------------------------------

 Area Code and Telephone No.:
                              ------------------------------------------------
 
 Dated:                                                                 , 1997
       ----------------------------------------------------------------
 
                                        4
<PAGE>   5
 
     IF SELLING SHARES SUBSEQUENT TO NOVEMBER 3, 1997, A RECORD HOLDER MUST
                    COMPLETE THE FOLLOWING IRREVOCABLE PROXY
 
           PLEASE SIGN THIS TO IRREVOCABLY TRANSFER A PREFERRED STOCK
              PROXY TO A SUBSEQUENT HOLDER OF PREFERRED STOCK WHO
                 WAS NOT A HOLDER OF RECORD ON NOVEMBER 3, 1997
 
                               IRREVOCABLE PROXY
                         with respect to shares of the
                          4.40% Series Preferred Stock
                                       of
                           MISSISSIPPI POWER COMPANY
                  the undersigned hereby irrevocably appoints
 
                      ------------------------------------
                        Type or Print Name of Transferee
 
as attorney and proxy, with full power of substitution, to vote and otherwise
act for and in the name(s) of the undersigned with respect to the Shares
indicated below which were held of record by the undersigned on November 3,
1997, in the manner in which the undersigned would be entitled to vote and
otherwise act in respect of such Shares on any and all matters.
 
     This proxy shall be effective whether or not the Shares indicated below are
tendered in the Offer.
 
     This instrument supersedes and revokes any and all previous appointments of
proxies heretofore made by the undersigned with respect to the Shares indicated
below as to any and all matters. THIS PROXY IS IRREVOCABLE AND IS COUPLED WITH
AN INTEREST.
 
     All authority conferred or agreed to be conferred herein shall survive the
death or incapacity of the undersigned, and any obligation of the undersigned
hereunder shall be binding upon the heirs, executors, administrators, legal and
personal representatives, successors in interest and assigns of the undersigned.
The undersigned understands that tenders of Shares pursuant to any of the
procedures described in the Offer to Purchase and Proxy Statement and in this
Letter of Transmittal and Proxy will constitute a binding agreement between the
undersigned and the Company upon the terms and subject to the conditions of the
Offer.
 
<TABLE>
<S>                                                 <C>
- -------------------------------------------------------------------------------------------------------
                                    DESCRIPTION OF PREFERRED STOCK
- -------------------------------------------------------------------------------------------------------
               CERTIFICATE NUMBER(S)                                 AGGREGATE NUMBER
            (ATTACH LIST IF NECESSARY)                                   OF SHARES
- -------------------------------------------------------------------------------------------------------
 
- -------------------------------------------------------------------------------------------------------
 
- -------------------------------------------------------------------------------------------------------
 
- -------------------------------------------------------------------------------------------------------
                                                    TOTAL:
- -------------------------------------------------------------------------------------------------------

- ------------------------------------------------       ------------------------------------------------
         Signature of Record Holder or                          Signature of Record Holder or
              Authorized Signatory                                   Authorized Signatory
 
- ------------------------------------------------       ------------------------------------------------
               Type or Print Name                                     Type or Print Name
 
Date:                                    ,  1997       Date:                                     , 1997
      -----------------------------------                   -------------------------------------

</TABLE>
 
Tax Identification or Social Security No(s).

 
                                        5
<PAGE>   6
 
Must be signed by holder(s) exactly as name(s) appear(s) on the Record Date on
certificate(s) for the Shares or on a security position listing or by person(s)
authorized to become holder(s) by certificates and documents transmitted
herewith. If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation, agent or other person acting in a
fiduciary or representative capacity, please provide the following information
and see Instruction 5.
 
Name:
     ---------------------------------------------------------------------------
                                    (PLEASE PRINT)
 
Capacity:
         -----------------------------------------------------------------------
                                      (FULL TITLE)
 
Address:
         -----------------------------------------------------------------------
                                  (INCLUDE ZIP CODE)
 
Area Code and Tel. No.
                       ---------------------------------------------------------
 
PLEASE COMPLETE IF APPLICABLE:


                           GUARANTEE OF SIGNATURE(S)
                   (IF REQUIRED -- SEE INSTRUCTIONS 1 AND 5)
 Name of Firm:
               -----------------------------------------------------------------
 Authorized Signature:
                        --------------------------------------------------------
 Title:
         -----------------------------------------------------------------------
 Dated:                                                                   , 1997
         -----------------------------------------------------------------

     DELIVERY OF THIS LETTER OF TRANSMITTAL AND PROXY TO AN ADDRESS OTHER THAN
AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY. YOU MUST SIGN THIS
LETTER OF TRANSMITTAL AND PROXY IN THE APPROPRIATE SPACE THEREFOR PROVIDED AND,
IF YOU ARE TENDERING ANY SHARES OR VOTING IN FAVOR OF THE PROPOSED AMENDMENT,
COMPLETE THE SUBSTITUTE FORM W-9 SET FORTH BELOW OR A FORM W-8, AS APPLICABLE.
SEE INSTRUCTION 8 AND "IMPORTANT TAX INFORMATION" BELOW.
 
     DO NOT SEND ANY CERTIFICATES TO MERRILL LYNCH & CO., CORPORATE INVESTOR
COMMUNICATIONS, INC., THE SOUTHERN COMPANY, SCS STOCKHOLDER SERVICES OR
MISSISSIPPI POWER COMPANY.
 
     THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL AND PROXY SHOULD
BE READ CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL AND PROXY IS COMPLETED.
QUESTIONS REGARDING AND REQUESTS FOR COPIES OF THE OFFER TO PURCHASE AND PROXY
STATEMENT OR THIS LETTER OF TRANSMITTAL AND PROXY MAY BE DIRECTED TO CORPORATE
INVESTOR COMMUNICATIONS, INC., THE INFORMATION AGENT, AT (888) 881-0526 (TOLL
FREE) OR BANKS AND BROKERS CALL (888) 349-2003.
 
     This Letter of Transmittal and Proxy is to be used (a) if Shares are to be
voted but not tendered, or (b) if certificates for Shares are to be forwarded to
The Bank of New York ("Depositary") or (c) if delivery of tendered Shares (as
defined below) is to be made by book-entry transfer to the Depositary's account
at The Depository Trust Company ("DTC" or the "Book-Entry Transfer Facility")
pursuant to the procedures set forth under the heading "Terms of the
Offer -- Procedure for Tendering Shares" in the Offer to Purchase and Proxy
Statement (as defined below) and an Agent's Message (as defined below) is not
delivered.
 
     Preferred Shareholders who wish to tender Shares but who cannot deliver
their Shares and all other documents required hereby to the Depositary by the
Expiration Date must tender their Shares pursuant to the guaranteed delivery
procedure set forth under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase
 
                                        6
<PAGE>   7
 
and Proxy Statement. See Instruction 2. DELIVERY OF DOCUMENTS TO SOUTHERN, THE
COMPANY OR THE BOOK-ENTRY TRANSFER FACILITY DOES NOT CONSTITUTE A VALID
DELIVERY.
 
[ ]  CHECK HERE IF TENDERED SHARES ARE ENCLOSED HEREWITH.
 
     A Holder tendering Shares pursuant to this Letter of Transmittal and Proxy
     must check one of the following boxes:
 
     [ ] A duly completed, valid and unrevoked proxy indicating a vote FOR the
         Proposed Amendment is included herein.
 
     [ ] A vote FOR the Proposed Amendment will be cast at the Special Meeting.
 
ELIGIBLE INSTITUTIONS OR BROKERS TO COMPLETE ONLY IF APPLICABLE:

 
 [ ]  CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY
      TRANSFER TO THE DEPOSITARY'S ACCOUNT AT THE BOOK-ENTRY TRANSFER
      FACILITY AND COMPLETE THE FOLLOWING:
 
      Name of tendering institution
                                    -----------------------------------------
 
      Account No. at DTC
                         ----------------------------------------------------
 
      Transaction Code No.
                           --------------------------------------------------

 [ ]  CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE
      OF GUARANTEED DELIVERY AND PROXY PREVIOUSLY SENT TO THE DEPOSITARY AND
      COMPLETE THE FOLLOWING:
 
      Name(s) of tendering shareholder(s)
                                          -----------------------------------
 
      Date of execution of Notice of Guaranteed Delivery and Proxy
                                                                   ----------
 
     Name of institution that guaranteed delivery
                                                   --------------------------
 
     If delivery is by book-entry transfer:
 
      Name of tendering institution
                                    -----------------------------------------
 
      Account No. at DTC
                         ----------------------------------------------------
 
      Transaction Code No.
                           --------------------------------------------------


     A holder electing to tender Shares pursuant to a Notice of Guaranteed
     Delivery and Proxy must check one of the following boxes:
 
     [ ]  A duly completed, valid and unrevoked proxy indicating a vote FOR the
          Proposed Amendment was included with the Notice of Guaranteed Delivery
          and Proxy previously sent to the Depositary.
 
     [ ]  A duly completed, valid and unrevoked proxy indicating a vote FOR the
          Proposed Amendment is being delivered pursuant to a Notice of
          Guaranteed Delivery and Proxy previously sent to the Depositary.
 
     [ ]  A valid vote FOR the Proposed Amendment will be cast at the Special
          Meeting.
 
                    NOTE: SIGNATURES MUST BE PROVIDED ABOVE.
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY.
 
                                        7
<PAGE>   8
 
Ladies and Gentlemen:
 
     The abovesigned hereby tenders to The Southern Company, a Delaware
corporation ("Southern"), the shares in the amount set forth in the box above
designated "Description of Shares Tendered" pursuant to Southern's offer to
purchase any and all of the outstanding shares (the "Shares") of the series of
preferred stock of Mississippi Power Company, a Mississippi corporation, and
direct utility subsidiary of Southern (the "Company"), shown on the first page
hereof as to which this Letter of Transmittal and Proxy is applicable (the
"Shares") at the purchase price per Share shown on the first page hereof plus
from the Company a dividend attributable to the period ending on the Payment
Date (as defined in the Offer to Purchase and Proxy Statement), net to the
seller in cash, upon the terms and subject to the conditions set forth in the
Offer to Purchase and Proxy Statement, dated November 3, 1997 (the "Offer to
Purchase and Proxy Statement"), receipt of which is hereby acknowledged, and in
this Letter of Transmittal and Proxy (which as to the Shares, together with the
Offer to Purchase and Proxy Statement, constitutes the "Offer"). PREFERRED
SHAREHOLDERS WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT TO THE COMPANY'S ARTICLES OF INCORPORATION, AS
AMENDED, AS SET FORTH IN THE OFFER TO PURCHASE AND PROXY STATEMENT (THE
"PROPOSED AMENDMENT"). THE OFFER IS CONDITIONED UPON THE PROPOSED AMENDMENT
BEING APPROVED AND ADOPTED AT THE SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON
DECEMBER 10, 1997, OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR
POSTPONED (THE "SPECIAL MEETING").  See "Proposed Amendment and Proxy
Solicitation," "Terms of the Offer -- Extension of Tender Period; Termination;
Amendments" and "Terms of the Offer -- Certain Conditions of the Offer" in the
Offer to Purchase and Proxy Statement.
 
     Subject to, and effective upon, acceptance for payment of and payment for
the Shares tendered herewith in accordance with the terms and subject to the
conditions of the Offer (including, if the Offer is extended or amended, the
terms and conditions of any such extension or amendment), the abovesigned hereby
sells, assigns and transfers to, or upon the order of, Southern all right, title
and interest in and to all the Shares that are being tendered hereby and hereby
constitutes and appoints The Bank of New York (the "Depositary") the true and
lawful agent and attorney-in-fact of the abovesigned with respect to such
Shares, with full power of substitution (such power of attorney being an
irrevocable power coupled with an interest), to (a) deliver certificates for
such Shares, or transfer ownership of such Shares on the account books
maintained by the Book-Entry Transfer Facility, together, in any such case, with
all accompanying evidences of transfer and authenticity, to or upon the order of
Southern, (b) present such Shares for registration and transfer on the books of
the Company and (c) receive all benefits and otherwise exercise all rights of
beneficial ownership of such Shares, all in accordance with the terms of the
Offer. The Depositary will act as agent for tendering shareholders for the
purpose of receiving payment from Southern and transmitting payment to tendering
shareholders.
 
     The abovesigned hereby represents and warrants that the abovesigned has
full power and authority to tender, sell, assign and transfer the Shares
tendered hereby and that, when and to the extent the same are accepted for
payment by Southern, Southern will acquire good, marketable and unencumbered
title thereto, free and clear of all liens, restrictions, charges, encumbrances,
conditional sales agreements or other obligations relating to the sale or
transfer thereof, and the same will not be subject to any adverse claims. The
abovesigned will, upon request, execute and deliver any additional documents
deemed by the Depositary or Southern to be necessary or desirable to complete
the sale, assignment and transfer of the Shares tendered hereby.
 
     All authority herein conferred or agreed to be conferred shall not be
affected by and shall survive the death, bankruptcy or incapacity of the
abovesigned, and any obligations of the abovesigned hereunder shall be binding
upon the heirs, legal representatives, successors, assigns, executors and
administrators of the abovesigned. Except as stated in the Offer, this tender is
irrevocable.
 
     The abovesigned understands that tenders of Shares pursuant to any one of
the procedures described under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase and Proxy Statement and in the
instructions hereto will constitute the abovesigned's acceptance of the terms
and conditions of the Offer, including the abovesigned's representation and
warranty that (a) the abovesigned has a net long position in the Shares being
tendered within the meaning of Rule 14e-4 promulgated under the Securities
Exchange Act of 1934, as amended, and (b) the tender of such Shares complies
with such Rule 14e-4. Southern's acceptance for payment of Shares tendered
pursuant to the Offer will constitute a binding agreement between the
abovesigned and Southern upon the terms and subject to the conditions of the
Offer.
 
     The abovesigned recognizes that, under certain circumstances set forth in
the Offer to Purchase and Proxy Statement, Southern may terminate or amend the
Offer or may not be required to purchase any of the Shares tendered hereby. In
either event, the abovesigned understands that certificate(s) for any Shares not
tendered or not purchased will be returned to the abovesigned.
 
                                        8
<PAGE>   9
 
     Unless otherwise indicated in the box below under the heading "Special
Payment Instructions," please issue the check for the purchase price of any
Shares purchased, and/or return any Shares not tendered or not purchased, in the
name(s) of the abovesigned (and, in the case of Shares tendered by book-entry
transfer, by credit to the account of the abovesigned at the Book-Entry Transfer
Facility). Similarly, unless otherwise indicated in the box below under the
heading "Special Delivery Instructions," please mail the check for the purchase
price of any Shares purchased and/or any certificates for Shares not tendered or
not purchased (and accompanying documents, as appropriate) to the abovesigned at
the address shown below the abovesigned's signature(s). In the event that both
"Special Payment Instructions" and "Special Delivery Instructions" are
completed, please issue the check for the purchase price of any Shares purchased
and/or return any Shares not tendered or not purchased in the name(s) of, and
mail said check and/or any certificates to, the person(s) so indicated. The
abovesigned recognizes that Southern has no obligation, pursuant to the "Special
Payment Instructions," to transfer any Shares from the name of the registered
holder(s) thereof if Southern does not accept for payment any of the Shares so
tendered.
 
COMPLETE ONLY IF APPLICABLE:
 
                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 4, 6 AND 7)
 
  To be completed ONLY if the check for the purchase price of Shares purchased,
the certificates for Shares not tendered or not purchased or the check for the
Special Cash Payment are to be issued in the name of someone other than the
abovesigned.
 
Issue  [ ] Check and/or  [ ] Certificate(s) to:
 
Name
      --------------------------------------------------------
                         (PLEASE PRINT)
 
Address
        ------------------------------------------------------
 
        ------------------------------------------------------
                       (INCLUDE ZIP CODE)
 
        ------------------------------------------------------
         (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NUMBER)
 
                     SPECIAL DELIVERY INSTRUCTIONS
                   (SEE INSTRUCTIONS 4, 6 AND 7)
 
  To be completed ONLY if the check for the purchase price of Shares purchased,
the certificates for Shares not tendered or not purchased or the check for the
Special Cash Payment are to be mailed to someone other than the abovesigned or
to the abovesigned at an address other than that shown below the abovesigned's
signature(s).
 
Mail  [ ] Check and/or  [ ] Certificate(s) to:
 
Name
      --------------------------------------------------------
                         (PLEASE PRINT)
 
Address
        ------------------------------------------------------
 
        ------------------------------------------------------
                       (INCLUDE ZIP CODE)
 
 
COMPLETE ONLY IF YOUR SHARES ARE LOST:
 
                             LOST CERTIFICATES BOX
 
   [ ] CHECK HERE IF ANY OF THE CERTIFICATES REPRESENTING SHARES THAT YOU OWN
       AND WISH TO TENDER HAVE BEEN LOST, DESTROYED OR STOLEN. (SEE
       INSTRUCTION 12.)
 
       Number of Shares represented by lost, destroyed or stolen certificates:
       
       -------------
    
                                        9
<PAGE>   10
 
COMPLETE ONLY IF APPLICABLE:
                         SOLICITED TENDERS AND PROXIES
                              (SEE INSTRUCTION 10)
        As provided in Instruction 10, Southern will pay a solicitation fee
   of an amount equal to 1.50% of par value per Share for any Shares
   tendered, accepted for payment and paid for pursuant to the Offer (except
   that for transactions for beneficial owners whose ownership equals or
   exceeds 2,500 Shares, Southern will pay a solicitation fee of an amount
   equal to 1.00% of the par value per Share). If the Proposed Amendment is
   approved and adopted, the Company agrees to pay a separate fee of an
   amount equal to 0.50% of the par value per Share for Shares that are not
   tendered pursuant to the Offer but which are voted in favor of the
   Proposed Amendment (except that with respect to transactions for
   beneficial owners whose ownership equals or exceeds 2,500 Shares, the
   Company will pay a separate fee of an amount equal to 0.25% of the par
   value of such Shares). With respect to fees payable pursuant to this
   paragraph involving transactions for beneficial owners whose ownership is
   less than 2,500 Shares, any fees payable hereunder shall be paid in full
   to the Dealer Manager unless a Soliciting Dealer is designated (as herein
   described), in which case such fee shall be payable in full to such
   designated Soliciting Dealer (which designated Soliciting Dealer may be
   the Dealer Manager). With respect to fees payable pursuant to this
   paragraph involving transactions for beneficial owners whose ownership
   equals or exceeds 2,500 Shares, any fees payable hereunder shall be paid
   in full to the Dealer Manager unless a Soliciting Dealer is designated, in
   which case 80% of such fee shall be paid to the Dealer Manager and 20% of
   such fee shall be paid to the designated Soliciting Dealer (which
   designated Soliciting Dealer may be the Dealer Manager). However,
   Soliciting Dealers will not be entitled to a solicitation fee for Shares
   beneficially owned by such Soliciting Dealer.
 
        The undersigned represents that the Soliciting Dealer which solicited
   and obtained this tender or proxy is:
 
   Name of Firm:
                 ------------------------------------------------------------
                                 (PLEASE PRINT)
 
   Name of Individual Broker
   or Financial Consultant:
                            -------------------------------------------------
 
   Telephone Number of Broker
   or Financial Consultant:  
                            -------------------------------------------------
 
   Identification Number (if known):
                                     ----------------------------------------
 
   Address:
            -----------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
COMPLETE ONLY IF CUSTOMER'S SHARES HELD IN NOMINEE NAME ARE TENDERED:
 
<TABLE>
<S>                                                <C>
           NAME OF BENEFICIAL OWNER                           NUMBER OF SHARES TENDERED
                              (ATTACH ADDITIONAL LIST IF NECESSARY)
- -----------------------------------------------    -----------------------------------------------
- -----------------------------------------------    -----------------------------------------------
- -----------------------------------------------    -----------------------------------------------
</TABLE>
 
     The acceptance of compensation by such Soliciting Dealer will constitute a
representation by it that (a) it has complied with the applicable requirements
of the Securities Exchange Act of 1934, as amended, and the applicable rules and
regulations thereunder, in connection with such solicitation; (b) it is entitled
to such compensation for such solicitation under the terms and conditions of the
Offer to Purchase and Proxy Statement; (c) in soliciting tenders of Shares, it
has used no solicitation materials other than those furnished by Southern; and
(d) if it is a foreign broker or dealer not eligible for membership in the
National Association of Securities Dealers, Inc. (the "NASD"), it has agreed to
conform to the NASD's Rules of Fair Practice in making solicitations.
 
     The payment of compensation to any Soliciting Dealer is dependent on such
Soliciting Dealer returning a Notice of Solicited Tenders and Proxies to the
Depositary.
 
     THIS LETTER OF TRANSMITTAL AND PROXY IS TO BE USED FOR THE TENDER OF SHARES
OF THE 4.40% SERIES (AS DEFINED IN THE OFFER TO PURCHASE AND PROXY STATEMENT)
ONLY. ANY PERSON DESIRING TO TENDER OR VOTE SHARES OF ANY OTHER SERIES OF
 
                                       10
<PAGE>   11
 
PREFERRED STOCK FOR WHICH SOUTHERN IS MAKING A TENDER OFFER AND/OR SOLICITING A
PROXY MUST SUBMIT A LETTER OF TRANSMITTAL AND PROXY RELATING TO THAT SPECIFIC
SERIES.
 
    PLEASE COMPLETE SUBSTITUTE FORM W-9 BELOW OR A FORM W-8, AS APPLICABLE.
 
SIGN HERE:
          ---------------------------------------------
                      SIGNATURE OF OWNER(S)
 
          ---------------------------------------------
                      SIGNATURE OF OWNER(S)
 
                                  INSTRUCTIONS
 
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. GUARANTEE OF SIGNATURES.  Except as otherwise provided below, all
signatures on this Letter of Transmittal and Proxy must be guaranteed by a firm
that is a member of a registered national securities exchange or the NASD, or by
a commercial bank or trust company having an office or correspondent in the
United States which is a participant in an approved Medallion Signature
Guarantee Program (each of the foregoing being referred to as an "Eligible
Institution"). Signatures on this Letter of Transmittal and Proxy need not be
guaranteed (a) if this Letter of Transmittal and Proxy is signed by the
registered holder(s) of the Shares (which term, for purposes of this document,
shall include any participant in the Book-Entry Transfer Facility whose name
appears on a security position listing as the owner of Shares) tendered herewith
and such holder(s) has not completed the box above under the heading "Special
Payment Instructions" or the box above under the heading "Special Delivery
Instructions" on this Letter of Transmittal and Proxy, (b) if such Shares are
tendered for the account of an Eligible Institution or (c) if this Letter of
Transmittal and Proxy is being used solely for the purpose of voting Shares
which are not being tendered pursuant to the Offer. See Instruction 5.
 
     2. DELIVERY OF LETTER OF TRANSMITTAL AND PROXY AND SHARES.  This Letter of
Transmittal and Proxy is to be used if (a) certificates are to be forwarded
herewith, (b) delivery of Shares to be made by book-entry transfer pursuant to
the procedures set forth under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase and Proxy Statement and an Agent's
Message (as defined below) is not delivered or (c) Shares are being voted in
connection with the Offer. Certificates for all physically delivered Shares, or
a confirmation of a book-entry transfer into the Depositary's account at the
Book-Entry Transfer Facility of all Shares delivered electronically, as well as
a properly completed and duly executed Letter of Transmittal and Proxy, and any
other documents required by this Letter of Transmittal and Proxy, must be
received by the Depositary at one of its addresses set forth on the front page
of this Letter of Transmittal and Proxy on or prior to the Expiration Date (as
defined in the Offer to Purchase and Proxy Statement) with respect to all
Shares. Preferred Shareholders who wish to tender their Shares yet who cannot
deliver their Shares and all other required documents to the Depositary on or
prior to the Expiration Date must tender their Shares pursuant to the guaranteed
delivery procedure set forth under the heading "Terms of the Offer -- Procedure
for Tendering Shares" in the Offer to Purchase and Proxy Statement. Pursuant to
such procedure: (a) such tender must be made by or through an Eligible
Institution, (b) a properly completed and duly executed Notice of Guaranteed
Delivery and Proxy in the form provided by Southern (with any required signature
guarantees) must be received by the Depositary on or prior to the Expiration
Date and (c) the certificates for all physically delivered Shares, or a
confirmation of a book-entry transfer into the Depositary's account at the
Book-Entry Transfer Facility of all Shares delivered electronically, together
with a properly completed and duly executed Letter of Transmittal and Proxy, and
any other documents required by this Letter of Transmittal and Proxy must be
received by the Depositary by 5:00 p.m. (New York City time) within three New
York Stock Exchange trading days after the date of execution of such Notice of
Guaranteed Delivery and Proxy, all as provided under the heading "Terms of the
Offer -- Procedure for Tendering Shares" in the Offer to Purchase and Proxy
Statement. Tenders by book-entry transfer may also be made by delivering an
Agent's Message in lieu of this Letter of Transmittal and Proxy. The term
"Agent's Message" means a message, transmitted by the Book-Entry Transfer
Facility, received by the Depositary and forming a part of the book-entry
transfer when a tender is initiated, which states that the Book-Entry Transfer
Facility has received an express acknowledgment from a participant tendering
Shares that such participant has received and agrees to be bound by the terms of
this Letter of Transmittal and Proxy and that Southern may enforce such
agreement against such participant.
 
     THE METHOD OF DELIVERY OF SHARES AND ALL OTHER REQUIRED DOCUMENTS IS AT THE
OPTION AND RISK OF THE TENDERING PREFERRED SHAREHOLDER. IF CERTIFICATES FOR
SHARES ARE SENT BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY
INSURED, IS RECOMMENDED.
 
                                       11
<PAGE>   12
 
     No alternative, conditional or contingent tenders will be accepted. See
"Terms of the Offer -- Number of Shares; Purchase Prices; Expiration Date;
Dividends" in the Offer to Purchase and Proxy Statement. By executing this
Letter of Transmittal and Proxy, the tendering shareholder waives any right to
receive any notice of the acceptance for payment of the Shares.
 
     3. VOTING.  PREFERRED SHAREHOLDERS (INCLUDING PREFERRED SHAREHOLDERS WHO
ACQUIRE SHARES SUBSEQUENT TO THE RECORD DATE) WHO WISH TO TENDER THEIR SHARES
PURSUANT TO THE OFFER MUST VOTE IN FAVOR OF THE PROPOSED AMENDMENT. THE OFFER IS
CONDITIONED UPON THE PROPOSED AMENDMENT BEING APPROVED AND ADOPTED AT THE
SPECIAL MEETING.  In addition, Preferred Shareholders have the right to vote for
the Proposed Amendment regardless of whether they tender their Shares by casting
their vote and duly executing this Letter of Transmittal and Proxy or by voting
in person at the Special Meeting. By executing a Notice of Guaranteed Delivery
and Proxy, a Preferred Shareholder is deemed to have tendered the Shares
described in such Notice of Guaranteed Delivery and Proxy and to have voted such
Shares in accordance with the proxy contained therein. If no vote is indicated
on an otherwise properly executed proxy contained within this Letter of
Transmittal and Proxy (or within a Notice of Guaranteed Delivery and Proxy),
then all Shares in respect of such proxy will be voted in favor of the Proposed
Amendment. See "Proposed Amendment and Proxy Solicitation" in the Offer to
Purchase and Proxy Statement. The Offer is being sent to all persons in whose
names Shares are registered on the books of the Company on the Record Date and
transferees thereof. Preferred Shareholders who purchase or whose purchase is
registered after the Record Date and who wish to tender in the Offer must
arrange with their seller to receive a proxy from the holder of record of such
Shares on the Record Date. Any holder of Shares held of record on the Record
Date in the name of another must establish to the satisfaction of the Company
his entitlement to exercise or transfer such Proxy. This will ordinarily require
an assignment by such record holder in blank or, if not in blank, to and from
each successive transferee, including the holder, with each signature guaranteed
by an Eligible Institution. See Instruction 5. In order to facilitate receipt of
proxies, Shares shall, during the period which commences on November 4, 1997
(two business days prior to the Record Date) and which will end at the close of
business on the Expiration Date, trade in the over-the-counter market with a
proxy providing the transferee with the right to vote such acquired Shares in
the Proxy Solicitation. No record date is fixed for determining which persons
are permitted to tender Shares. However, only the holders of record, or holders
who acquire an assignment of proxy from such holders, are permitted to vote for
the Proposed Amendment and thereby validly tender Shares pursuant to the Offer.
Any person who is the beneficial owner but not the record holder of Shares must
arrange for the record transfer of such Shares prior to tendering or direct the
record holder to tender on behalf of the beneficial owner.
 
     4. PARTIAL TENDERS (NOT APPLICABLE TO SHAREHOLDERS WHO TENDER BY BOOK-ENTRY
TRANSFER).  If fewer than all the Shares represented by any certificate
delivered to the Depositary are to be tendered, fill in the number of Shares
that are to be tendered in the box above under the heading "Description of
Shares Tendered." In such case, a new certificate for the remainder of the
Shares represented by the old certificate will be sent to the person(s) signing
this Letter of Transmittal and Proxy, unless otherwise provided in the box above
under the heading "Special Payment Instructions" or "Special Delivery
Instructions," as promptly as practicable following the expiration or
termination of the Offer. All Shares represented by certificates delivered to
the Depositary will be deemed to have been tendered unless otherwise indicated.
 
     5. SIGNATURES ON THIS LETTER OF TRANSMITTAL AND PROXY AND/OR NOTICE OF
GUARANTEED DELIVERY AND PROXY; STOCK POWERS AND ENDORSEMENTS.  If either this
Letter of Transmittal and Proxy or the Notice of Guaranteed Delivery and Proxy
(together, the "Tender and Proxy Documents") is signed by the registered
holder(s) of the Shares tendered hereby, the signature(s) must correspond with
the name(s) as written on the face of the certificates without alteration,
enlargement or any change whatsoever.
 
     If any of the Shares tendered or voted under either Tender and Proxy
Document are held of record by two or more persons, all such persons must sign
such Tender and Proxy Document.
 
     If any of the Shares tendered or voted under either Tender and Proxy
Document are registered in different names or different certificates, it will be
necessary to complete, sign and submit as many separate applicable Tender and
Proxy Documents as there are different registrations or certificates.
 
     If either Tender and Proxy Document is signed by the registered holder(s)
of the Shares tendered hereby, no endorsements of certificates or separate stock
powers are required unless payment of the purchase price is to be made to, or
Shares not tendered or not purchased are to be registered in the name of, any
person other than the registered holder(s). Signatures on any such certificates
or stock powers must be guaranteed by an Eligible Institution. See Instruction
1.
 
                                       12
<PAGE>   13
 
     If this Letter of Transmittal and Proxy is signed by a person other than
the registered holder(s) of the Shares tendered hereby, certificates must be
endorsed or accompanied by appropriate stock powers, in either case, signed
exactly as the name(s) of the registered holder(s) appear(s) on the certificates
for such Shares. Signature(s) on any such certificates or stock powers must be
guaranteed by an Eligible Institution. See Instruction 1.
 
     If either Tender and Proxy Document or any certificate or stock power is
signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or representative
capacity, such person should so indicate when signing, and proper evidence
satisfactory to Southern of the authority of such person so to act must be
submitted.
 
     6. STOCK TRANSFER TAXES.  Except as set forth in this Instruction 6,
Southern will pay or cause to be paid any stock transfer taxes with respect to
the sale and transfer of any Shares to it or its order pursuant to the Offer.
If, however, payment of the purchase price is to be made to, or Shares not
tendered or not purchased are to be registered in the name of, any person other
than the registered holder(s), or if tendered Shares are registered in the name
of any person other than the person(s) signing this Letter of Transmittal and
Proxy, the amount of any stock transfer taxes (whether imposed on the registered
holder(s), such other person or otherwise) payable on account of the transfer to
such person will be deducted from the purchase price unless satisfactory
evidence of the payment of such taxes, or exemption therefrom, is submitted. See
"Terms of the Offer -- Acceptance of Shares for Payment and Payment of Purchase
Price and Dividends" in the Offer to Purchase and Proxy Statement. EXCEPT AS
PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY TO AFFIX TRANSFER TAX
STAMPS TO THE CERTIFICATES REPRESENTING SHARES TENDERED HEREBY.
 
     7. SPECIAL PAYMENT AND DELIVERY INSTRUCTIONS.  If the check for the
purchase price of any Shares purchased is to be issued in the name of, any
Shares not tendered or not purchased are to be returned to or the check for the
Special Cash Payment is to be issued in the name of, a person other than the
person(s) signing this Letter of Transmittal and Proxy or if the check and/or
any certificate for Shares not tendered or not purchased are to be mailed to
someone other than the person(s) signing this Letter of Transmittal and Proxy or
to an address other than that shown in the box above under the heading "Name(s)
and Address(es) of Registered Holder(s)," then the "Special Payment
Instructions" and/or "Special Delivery Instructions" on this Letter of
Transmittal and Proxy should be completed. Preferred Shareholders tendering
Shares by book-entry transfer will have any Shares not accepted for payment
returned by crediting the account maintained by such Preferred Shareholder at
the Book-Entry Transfer Facility.
 
     8. SUBSTITUTE FORM W-9 AND FORM W-8.  A tendering Preferred Shareholder and
a Preferred Shareholder voting in favor of the Proposed Amendment (but not
tendering) is required to provide the Depositary with (i) in the case of a
United States Preferred Shareholder, a correct Taxpayer Identification Number
("TIN") and a certification that the IRS has not notified such shareholder that
he is subject to backup withholding on Substitute Form W-9, or (ii) in the case
of a foreign Preferred Shareholder, a properly completed Form W-8, as discussed
below under "Important Tax Information." Failure to provide the information on
either Substitute Form W-9 or Form W-8 may subject the Preferred Shareholder to
a $50 penalty imposed by the Internal Revenue Service and to 31% Federal income
tax backup withholding on the gross amount payable. The box in Part 2 of
Substitute Form W-9 may be checked if the Preferred Shareholder has not been
issued a TIN and has applied for a number or intends to apply for a number in
the near future. If the box in Part 2 is checked and the Depositary is not
provided with a TIN by the time of payment, the Depositary will withhold 31% of
the gross amount otherwise payable until a TIN is provided to the Depositary.
 
     9. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.  Any questions or requests
for assistance may be directed to the Information Agent or the Dealer Manager at
their respective telephone numbers and addresses listed below. Requests for
additional copies of the Offer to Purchase and Proxy Statement, this Letter of
Transmittal and Proxy or other tender offer materials may be directed to the
Information Agent or the Dealer Manager and such copies will be furnished
promptly at Southern's expense. Preferred Shareholders may also contact their
local broker, dealer, commercial bank or trust company for assistance concerning
the Offer.
 
     10. SOLICITED TENDERS AND PROXIES.  Southern will pay a solicitation fee of
an amount equal to 1.50% of the par value per Share for Shares that are
tendered, accepted for payment and paid for pursuant to the Offer (except that
for transactions for beneficial owners whose ownership equals or exceeds 2,500
Shares, Southern will pay a solicitation fee of an amount equal to 1.00% of the
par value per Share). If the Proposed Amendment is approved and adopted, the
Company agrees to pay a separate fee of an amount equal to 0.50% of the par
value per Share for Shares that are not tendered pursuant to the Offer but which
are voted in favor of the Proposed Amendment (except that with respect to
transactions for beneficial owners whose ownership equals or exceeds 2,500
Shares, the Company will pay a separate fee of an amount equal to 0.25% of the
par value of such Shares). With respect to fees payable pursuant to this
paragraph involving transactions for beneficial owners whose ownership is less
than 2,500 Shares, any fees payable hereunder shall be paid in full to the
Dealer Manager unless a Soliciting Dealer is designated (as herein described),
in which case such fee
 
                                       13
<PAGE>   14
 
shall be payable in full to such designated Soliciting Dealer (which designated
Soliciting Dealer may be the Dealer Manager). With respect to fees payable
pursuant to this paragraph involving transactions for beneficial owners whose
ownership equals or exceeds 2,500 Shares, any fees payable hereunder shall be
paid in full to the Dealer Manager unless a Soliciting Dealer is designated, in
which case 80% of such fee shall be paid to the Dealer Manager and 20% of such
fee shall be paid to the designated Soliciting Dealer (which designated
Soliciting Dealer may be the Dealer Manager). A designated Soliciting Dealer
shall be named hereunder under the heading "Solicited Tenders and Proxies," and
shall have solicited and obtained the tender or proxy, and shall also be (a) any
broker or dealer in securities, including the Dealer Manager in its capacity as
a dealer or broker, which is a member of any national securities exchange or of
the NASD, (b) any foreign broker or dealer not eligible for membership in the
NASD which agrees to conform to the NASD's Rules of Fair Practice in soliciting
tenders outside the United States to the same extent as though it were an NASD
member, or (c) any bank or trust company (each of which is referred to herein as
a "Soliciting Dealer"). No such fee shall be payable to a Soliciting Dealer with
respect to the tender of Shares by a holder unless the Letter of Transmittal and
Proxy accompanying such tender designates such Soliciting Dealer. No such fee
shall be payable to a Soliciting Dealer in respect of Shares registered in the
name of such Soliciting Dealer unless such Shares are held by such Soliciting
Dealer as nominee and such Shares are being tendered for the benefit of one or
more beneficial owners identified on the Letter of Transmittal and Proxy or on
the Notice of Solicited Tenders and Proxies (included in the materials provided
to brokers and dealers). No such fee shall be payable to a Soliciting Dealer
with respect to the tender of Shares by the holder of record, for the benefit of
the beneficial owner, unless the beneficial owner has designated such Soliciting
Dealer. If tendered Shares are being delivered by book-entry transfer, the
Soliciting Dealer must return a Notice of Solicited Tenders and Proxies to the
Depositary within three business days after expiration of the Offer to receive a
solicitation fee. No such fee shall be payable to a Soliciting Dealer if such
Soliciting Dealer is required for any reason to transfer the amount of such fee
to a depositing holder (other than itself). No such fee shall be paid to a
Soliciting Dealer with respect to Shares tendered for such Soliciting Dealer's
own account. No broker, dealer, bank, trust company or fiduciary shall be deemed
to be the agent of Southern, the Company, the Depositary, the Information Agent
or the Dealer Manager for purposes of the Offer.
 
     Soliciting Dealers will include any organizations described in clauses (a),
(b) or (c) above even when the activities of such organization in connection
with the Offer consist solely of forwarding to clients materials relating to the
Offer, including this Letter of Transmittal and Proxy, and tendering Shares as
directed by beneficial owners thereof. No Soliciting Dealer is required to make
any recommendation to holders of Shares as to whether to tender or refrain from
tendering in the Offer. No assumption is made, in making payment to any
Soliciting Dealer, that its activities in connection with the Offer included any
activities other than those described above, and for all purposes noted in all
materials relating to the Offer, the term "solicit" shall be deemed to mean no
more than "processing shares tendered," "processing shares voted" or "forwarding
to customers materials regarding the Offer."
 
     11. IRREGULARITIES.  All questions as to the form of documents and the
validity, eligibility (including time of receipt) and acceptance of any tender
of Shares will be determined by Southern, in its sole discretion, and its
determination shall be final and binding. Southern reserves the absolute right
to reject any and all tenders of Shares that it determines are not in proper
form or the acceptance for payment of or payment for Shares that may, in the
opinion of Southern's counsel, be unlawful. Southern also reserves the absolute
right to waive any of the conditions to the Offer or any defect or irregularity
in any tender of Shares and Southern's interpretation of the terms and
conditions of the Offer (including these instructions) shall be final and
binding. Unless waived, any defects or irregularities in connection with tenders
must be cured within such time as Southern shall determine. None of Southern,
the Company, the Dealer Manager, the Depositary, the Information Agent or any
other person shall be under any duty to give notice of any defect or
irregularity in tenders, nor shall any of them incur any liability for failure
to give any such notice. Tenders will not be deemed to have been made until all
defects and irregularities have been cured or waived.
 
     12. LOST, DESTROYED OR STOLEN CERTIFICATES.  If any of your certificate(s)
for Shares have been lost, stolen or destroyed, please call SCS Stockholder
Services collect at 404-506-0967. You may need to complete an Affidavit of Loss
with respect to the lost certificate(s) (which will be provided by SCS
Stockholder Services) and payment of an indemnity bond premium fee may be
required. The tender of Shares pursuant to this Letter of Transmittal and Proxy
will not be valid unless prior to the Expiration Date: (a) such procedures have
been completed and a replacement certificate for the Shares has been delivered
to the Depositary or (b) a Notice of Guaranteed Delivery and Proxy has been
delivered to the Depositary. See Instruction 2.
 
     IMPORTANT:  THIS LETTER OF TRANSMITTAL AND PROXY, DULY EXECUTED, TOGETHER
WITH, IF APPLICABLE, CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY TRANSFER, AND
ALL OTHER REQUIRED DOCUMENTS MUST BE RECEIVED BY THE DEPOSITARY, OR, IF
APPLICABLE, THE NOTICE OF GUARANTEED DELIVERY AND PROXY MUST BE RECEIVED BY THE
DEPOSITARY, ON OR PRIOR TO THE EXPIRATION DATE.
 
                                       14
<PAGE>   15
 
                           IMPORTANT TAX INFORMATION
 
     Under United States Federal income tax law, a Preferred Shareholder whose
tendered Shares are accepted for payment or who will receive a Special Cash
Payment as a result of voting in favor of the Proposed Amendment is required to
provide the Depositary (as payer) with either such Preferred Shareholder's
correct TIN and a certification that the IRS has not notified such shareholder
that he is subject to backup withholding on Substitute Form W-9 below or a
properly completed Form W-8. If such Preferred Shareholder is an individual, the
TIN is his or her social security number. For a business or other entity, the
TIN is its federal employer identification number. If the Depositary is not
provided with the correct TIN or properly completed Form W-8, the Preferred
Shareholder may be subject to a $50 penalty imposed by the Internal Revenue
Code. In addition, payments that are made to such Preferred Shareholder with
respect to Shares purchased pursuant to the Offer may be subject to 31% backup
withholding.
 
     Certain Preferred Shareholders (including, among others, all corporations
and certain foreign individuals) are exempt from backup withholding. For a
corporate United States Preferred Shareholder to qualify for such exemption,
such Preferred Shareholder must provide the Depositary with a properly completed
and executed Substitute Form W-9 attesting to its exempt status. In order for a
foreign Preferred Shareholder to qualify as an exempt recipient, such Preferred
Shareholder must submit to the Depositary a properly completed Internal Revenue
Service Form W-8, signed under penalties of perjury, attesting to that Preferred
Shareholder's exempt status. A Form W-8 can be obtained from the Depositary. See
the enclosed Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9 for additional instructions.
 
     If Federal income tax backup withholding applies, the Depositary is
required to withhold 31% of any payments made to the Preferred Shareholder.
Backup withholding is not an additional tax. Rather, the Federal income tax
liability of persons subject to backup withholding will be reduced by the amount
of the tax withheld. If withholding results in an overpayment of taxes, a refund
may be obtained from the Internal Revenue Service.
 
PURPOSE OF SUBSTITUTE FORM W-9 AND FORM W-8
 
     To avoid backup withholding on a Special Cash Payment or payments that are
made to a Preferred Shareholder with respect to Shares purchased pursuant to the
Offer, the Preferred Shareholder is required to notify the Depositary of his or
her correct TIN by completing the Substitute Form W-9 attached hereto certifying
that the TIN provided on Substitute Form W-9 is correct and that (a) the
Preferred Shareholder has not been notified by the Internal Revenue Service that
he or she is subject to Federal income tax backup withholding as a result of
failure to report all interest or dividends or (b) the Internal Revenue Service
has notified the Preferred Shareholder that he or she is no longer subject to
Federal income tax backup withholding. Foreign Preferred Shareholders must
submit a properly completed Form W-8 in order to avoid the applicable backup
withholding; provided, however, that backup withholding will not apply to
foreign Preferred Shareholders subject to withholding under other provisions of
the Code on the Special Cash Payment or on gross payments received pursuant to
the Offer. Foreign Preferred Shareholders that submit a properly completed Form
W-8 may nevertheless be subject to withholding under other provisions of the
Code on the payments received by them.
 
                                       15
<PAGE>   16
 
WHAT NUMBER TO GIVE THE DEPOSITARY
 
     The Preferred Shareholder is required to give the Depositary the TIN of the
registered owner of the Shares. If the Shares are in more than one name or are
not in the name of the actual owner, consult the enclosed Guidelines for
Certification of Taxpayer Identification Number on Substitute Form W-9 for
additional guidance on which number to report.
 
                       PAYER'S NAME: THE BANK OF NEW YORK
 

<TABLE>
<S>                                <C>                                                           <C>
                                     --------------------------------------------------------------------------------------------
                                     PART 1--PLEASE PROVIDE YOUR TIN IN THE BOX AT RIGHT AND      ----------------------------
  SUBSTITUTE                         CERTIFY BY SIGNING AND DATING BELOW.                            SOCIAL SECURITY NUMBER
   FORM W-9
                                                                                                               OR
                                                                                                  ----------------------------
                                                                                                   EMPLOYER IDENTIFICATION TIN
                                     --------------------------------------------------------------------------------------------   
                                     NAME (PLEASE PRINT)                                                    PART 2 --
                                                        --------------------------------------
                                     ADDRESS                                                            AWAITING TIN [ ]
                                             -------------------------------------------------
                                     CITY                                     STATE
                                          ------------------------------------      ----------
                                     ZIP CODE
                                              -------------------------
                                     --------------------------------------------------------------------------------------------   
  DEPARTMENT OF THE TREASURY         PART 3 -- CERTIFICATION -- UNDER PENALTIES OF PERJURY, I CERTIFY THAT:
  INTERNAL REVENUE SERVICE           
                                     (1) THE NUMBER SHOWN ON THIS FORM IS MY CORRECT TAXPAYER IDENTIFICATION NUMBER (OR A TIN
                                     HAS NOT BEEN ISSUED TO ME BUT I HAVE MAILED OR DELIVERED AN APPLICATION TO RECEIVE A TIN OR
                                     INTEND TO DO SO IN THE NEAR FUTURE), (2) I AM NOT SUBJECT TO BACKUP WITHHOLDING EITHER
                                     BECAUSE I HAVE NOT BEEN NOTIFIED BY THE INTERNAL REVENUE SERVICE (THE "IRS") THAT I AM
                                     SUBJECT TO BACKUP WITHHOLDING AS A RESULT OF A FAILURE TO REPORT ALL INTEREST OR DIVIDENDS
                                     OR THE IRS HAS NOTIFIED ME THAT I AM NO LONGER SUBJECT TO BACKUP WITHHOLDING AND (3) ALL
                                     OTHER INFORMATION PROVIDED ON THIS FORM IS TRUE, CORRECT AND COMPLETE.
                                     SIGNATURE 
                                                ---------------------------------------------------------------------------------
                                     DATE                        , 1997
                                           ---------------------

                                     YOU MUST CROSS OUT ITEM (2) ABOVE IF YOU HAVE BEEN NOTIFIED BY THE IRS THAT YOU ARE
                                     CURRENTLY SUBJECT TO BACKUP WITHHOLDING BECAUSE OF UNDERREPORTING INTEREST OR DIVIDENDS ON
                                     YOUR TAX RETURN.
                                     --------------------------------------------------------------------------------------------   
                                     NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING OF 31% OF
  PAYER'S REQUEST FOR                ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER OR PROXY SOLICITATION. PLEASE REVIEW THE
  TAXPAYER IDENTIFICATION            ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM
  NUMBER ("TIN") AND CERTIFICATION   W-9 FOR ADDITIONAL DETAILS. YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE
                                     BOX IN PART 2 OF SUBSTITUTE FORM W-9.
                                                         CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER:
                                     I CERTIFY UNDER PENALTIES OF PERJURY THAT A TAXPAYER IDENTIFICATION NUMBER HAS NOT BEEN
                                     ISSUED TO ME AND EITHER (1) I HAVE MAILED OR DELIVERED AN APPLICATION TO RECEIVE A TAXPAYER
                                     IDENTIFICATION NUMBER TO THE APPROPRIATE INTERNAL REVENUE SERVICE CENTER OR SOCIAL SECURITY
                                     ADMINISTRATION OFFICE OR (2) I INTEND TO DO SO IN THE NEAR FUTURE. I UNDERSTAND THAT IF I
                                     DO NOT PROVIDE A TAXPAYER IDENTIFICATION NUMBER BY THE TIME OF PAYMENT, 31% OF ALL PAYMENTS
                                     MADE TO ME WILL BE WITHHELD UNTIL I PROVIDE A NUMBER.
                                     SIGNATURE                                            DATE:                         , 1997
                                                -----------------------------------------       ------------------------
</TABLE>
 
                             THE INFORMATION AGENT:
 
                    CORPORATE INVESTOR COMMUNICATIONS, INC.
                               111 Commerce Road
                          Carlstadt, New Jersey 07072
                           (888) 881-0526 (toll free)
                             Banks and Brokers call
                                 (888) 349-2003
<PAGE>   17
 
                                                                       4.60% MPC
 
                        LETTER OF TRANSMITTAL AND PROXY
                                  TO ACCOMPANY
                     SHARES OF 4.60% SERIES PREFERRED STOCK
                             CUSIP NUMBER 605417302
                                       OF
 
                           MISSISSIPPI POWER COMPANY
              TENDERED PURSUANT TO THE OFFER TO PURCHASE FOR CASH
                                       BY
 
                              THE SOUTHERN COMPANY
                   DATED NOVEMBER 3, 1997, FOR PURCHASE AT A
                       PURCHASE PRICE OF $85.98 PER SHARE
 
                                     AND/OR
 
                     VOTED PURSUANT TO THE PROXY STATEMENT
                                       OF
 
                           MISSISSIPPI POWER COMPANY
 
       THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK
         CITY TIME, ON DECEMBER 10, 1997, UNLESS THE OFFER IS EXTENDED.
 
           THE PROXY CONTAINED IN THIS DOCUMENT IS IN RESPECT OF THE
        SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 10, 1997,
        OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR POSTPONED.
 
                      TO: THE BANK OF NEW YORK, DEPOSITARY
 
<TABLE>
<S>                                                 <C>
                     BY MAIL:                                 BY HAND OR OVERNIGHT COURIER:
           Tender & Exchange Department                        Tender & Exchange Department
                  P.O. Box 11248                                    101 Barclay Street
              Church Street Station                             Receive and Deliver Window
          New York, New York 10286-1248                          New York, New York 10286
</TABLE>
 
                NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)
(PLEASE FILL IN EXACTLY AS NAME(S) AND ADDRESS(ES) APPEAR(S) ON CERTIFICATE(S))

     IF YOU HAVE ANY QUESTIONS, HAVE NOT RECEIVED THE OFFER TO PURCHASE AND
PROXY STATEMENT OR OTHER DOCUMENTS PERTAINING TO THE OFFER, OR NEED ASSISTANCE
IN COMPLETING THIS LETTER OF TRANSMITTAL AND PROXY, PLEASE CONTACT CORPORATE
INVESTOR COMMUNICATIONS, INC., THE INFORMATION AGENT, AT TELEPHONE (888)
881-0526 (TOLL FREE).
<PAGE>   18
 
     PREFERRED SHAREHOLDERS (INCLUDING PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES
SUBSEQUENT TO THE RECORD DATE) WILL NOT BE ABLE TO VALIDLY TENDER THEIR SHARES
UNLESS THEY HAVE SUBMITTED A DULY COMPLETED, VALID AND UNREVOKED PROXY
INDICATING THEIR VOTE FOR THE PROPOSED AMENDMENT OR INDICATE IN THE ACCOMPANYING
PROXY THEIR INTENTION TO VOTE FOR THE PROPOSED AMENDMENT AT THE SPECIAL MEETING.
THE SOUTHERN COMPANY ("SOUTHERN") WILL NOT BE REQUIRED TO ACCEPT FOR PAYMENT OR
PAY FOR ANY SHARES TENDERED IF THE PROPOSED AMENDMENT IS NOT APPROVED AND
ADOPTED AT THE SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 10, 1997,
OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR POSTPONED (THE "SPECIAL
MEETING"). PREFERRED SHAREHOLDERS HAVE THE RIGHT TO VOTE FOR THE PROPOSED
AMENDMENT REGARDLESS OF WHETHER THEY TENDER THEIR SHARES BY CASTING THEIR VOTE
AND SIGNING THE PROXY CONTAINED WITHIN THIS LETTER OF TRANSMITTAL AND PROXY OR
BY VOTING IN PERSON AT THE SPECIAL MEETING. IF THE PROPOSED AMENDMENT IS
APPROVED AND ADOPTED, MISSISSIPPI POWER COMPANY (THE "COMPANY") WILL MAKE A
SPECIAL CASH PAYMENT TO EACH PREFERRED SHAREHOLDER WHO VOTED IN FAVOR OF THE
PROPOSED AMENDMENT, PROVIDED THAT SUCH HOLDER'S SHARES ARE NOT TENDERED PURSUANT
TO THE OFFER.
 
     HOLDERS WHO PURCHASE OR WHOSE PURCHASE SETTLES OR IS REGISTERED AFTER THE
CLOSE OF BUSINESS ON NOVEMBER 6, 1997 (THE "RECORD DATE") AND WHO WISH TO TENDER
IN THE OFFER MUST ARRANGE WITH THEIR SELLER TO RECEIVE A DULY COMPLETED, VALID
AND UNREVOKED PROXY (WHICH MAY BE IN THE FORM OF AN IRREVOCABLE ASSIGNMENT OF
PROXY AS SET FORTH IN THIS LETTER OF TRANSMITTAL AND PROXY) FROM THE HOLDER OF
RECORD OF SUCH SHARES ON THE RECORD DATE. IN ORDER TO FACILITATE RECEIPT OF
PROXIES, SHARES SHALL, DURING THE PERIOD WHICH COMMENCES NOVEMBER 4, 1997 (TWO
BUSINESS DAYS PRIOR TO THE RECORD DATE) AND WHICH WILL END AT THE CLOSE OF
BUSINESS ON THE EXPIRATION DATE (AS DEFINED IN THE OFFER TO PURCHASE AND PROXY
STATEMENT), TRADE IN THE OVER-THE-COUNTER MARKET WITH A PROXY PROVIDING THE
TRANSFEREE WITH THE RIGHT TO VOTE SUCH ACQUIRED SHARES IN THE PROXY
SOLICITATION.
 
     NOTE: SIGNATURES MUST BE PROVIDED HEREIN. PLEASE READ THE ACCOMPANYING
                            INSTRUCTIONS CAREFULLY.
 
     The undersigned hereby appoints Dwight H. Evans, Michael W. Southern and
Wayne Boston, or any of them, as proxies, each with the power to appoint his or
her substitute, and hereby authorizes them to represent and to vote as
designated hereunder and in their discretion with respect to any other business
properly brought before the Special Meeting all the shares of preferred stock of
the Company which the undersigned is entitled to vote at the Special Meeting or
any adjournment(s) or postponement(s) thereof.
 
     NOTE: IF YOU ARE VOTING BUT NOT TENDERING SHARES, DO NOT SEND ANY SHARE
CERTIFICATES WITH THIS LETTER OF TRANSMITTAL AND PROXY.
 
     THIS LETTER OF TRANSMITTAL AND PROXY IS SOLICITED ON BEHALF OF THE BOARD OF
DIRECTORS OF THE COMPANY. The proxy contained herein, when properly executed,
will be voted in the manner directed herein by the undersigned shareholder(s).
If no direction is made, the proxy will be voted FOR Item 1. An abstention is
the equivalent of a vote AGAINST the Proposed Amendment.
 
     PREFERRED SHAREHOLDERS WHO WISH TO TENDER THEIR SHARES MUST VOTE FOR ITEM
1.
 
     Indicate your vote by an (X). The Board of Directors recommends voting FOR
Item 1.
 
     HOLDERS OF SHARES WHO WISH TO TENDER THEIR SHARES MUST VOTE FOR THE
PROPOSED AMENDMENT EITHER BY SUBMITTING THIS PROXY OR BY VOTING AT THE SPECIAL
MEETING.
 
ITEM 1.
 
     To remove from the Company's Articles of Incorporation, as amended, (i)
Subparagraph F(b) of Paragraph FOURTH under "General Provisions" of the
"Preferred Stock" section, a provision restricting the amount of securities
representing unsecured indebtedness issuable by the Company, (ii) Subparagraph
(F)(a) of Paragraph FOURTH under "General Provisions" of the "Preferred Stock"
section, a provision which requires the vote of the holders of at least a
majority of the total voting power of the Company's outstanding preferred stock
to approve the sale of all or substantially all of the Company's property and
mergers or consolidations that have not been approved under the Public Utility
Holding Company Act of 1935, as amended, and (iii) Subparagraph (B) (except the
first paragraph therein) of Paragraph
 
                                        2
<PAGE>   19
 
FOURTH under "General Provisions" of the "Preferred Stock" section, a provision
restricting the ability of the Company to pay dividends on its common stock in
the event that its common equity capitalization falls below certain levels.
 
                  [ ] FOR       [ ] AGAINST       [ ] ABSTAIN
 
     SHARES REPRESENTED BY ALL PROPERLY EXECUTED PROXIES WILL BE VOTED IN
ACCORDANCE WITH INSTRUCTIONS APPEARING ON THIS PROXY. IN THE ABSENCE OF SPECIFIC
INSTRUCTIONS, PROXIES WILL BE VOTED IN ACCORDANCE WITH THE RECOMMENDATIONS OF
THE BOARD OF DIRECTORS, AND IN THE DISCRETION OF THE PROXY HOLDERS AS TO ANY
OTHER MATTERS THAT MAY PROPERLY COME BEFORE THE SPECIAL MEETING.
 
     Any holder of Shares held of record on the Record Date in the name of
another holder must establish to the satisfaction of the Company its entitlement
to exercise or transfer this Proxy. This will ordinarily require an assignment
by such record holders in blank or, if not in blank, to and from each successive
transferee, including the holder, with each signature guaranteed by an Eligible
Institution. A form of irrevocable assignment of proxy has been provided herein.
 
Please check box if you plan to attend the Special Meeting.  [ ]


 
                            SIGNATURE(S) OF OWNER(S)
 
X
 -------------------------------------------------------------------------------
 
X
 -------------------------------------------------------------------------------
Dated:                                                                    , 1997
      -------------------------------------------------------------------

Name(s):
        ------------------------------------------------------------------------
                                 (PLEASE PRINT)
Capacity (full title):
                       ---------------------------------------------------------
Address:
         -----------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
DAYTIME Area Code and Telephone No.:
                                     -------------------------------------------
 

(Must be signed by the registered holder(s) exactly as name(s) appear(s) on the
stock certificates or on a security position listing or by person(s) authorized
to become registered holder(s) by certificates and documents transmitted
herewith. If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation or other person acting in a fiduciary
or representative capacity, please set forth full title and see Instruction 5.)

 
                                        3
<PAGE>   20
 
PLEASE COMPLETE:
 
<TABLE>
<CAPTION>
                                             DESCRIPTION OF SHARES TENDERED
                 (IF TENDERING SHARES, PLEASE FILL IN EXACTLY AS INFORMATION APPEARS ON CERTIFICATE(S))
                                      (ATTACH ADDITIONAL SIGNED LIST IF NECESSARY)
                                                                                                   NUMBER OF SHARES NOT
                                                    TOTAL NUMBER OF SHARES                          TENDERED BUT AS TO
                                                        REPRESENTED BY        NUMBER OF SHARES     WHICH PROXIES GIVEN
              CERTIFICATE NUMBER(S)*                   CERTIFICATE(S)*           TENDERED**                ONLY
<S>                                                 <C>                    <C>                    <C>
</TABLE>
  * Need not be completed by shareholders tendering by book-entry transfer.
 ** Unless otherwise indicated, it will be assumed that all Shares represented
    by any certificates delivered to the Depositary are being tendered. See 
    Instruction 4.  You must vote for the Proposed Amendment with respect to 
    any Shares tendered.
 
      If any of your certificate(s) for Shares have been lost, stolen or
 destroyed, please call the Company's shareholder services department ("SCS
 Stockholder Services") collect at 404-506-0967. You may need to complete an
 Affidavit of Loss with respect to the lost certificate(s) (which will be
 provided by SCS Stockholder Services) and payment of an indemnity bond premium
 fee may be required.
 
PLEASE COMPLETE IF APPLICABLE:
                           GUARANTEE OF SIGNATURE(S)
                           (SEE INSTRUCTIONS 1 AND 5)
 
 Authorized Signature:
 
 Name:
       -----------------------------------------------------------------------
 
 Name of Firm:
               ---------------------------------------------------------------
 
 Address of Firm:
                  ------------------------------------------------------------
 
 -----------------------------------------------------------------------------

 Area Code and Telephone No.:
                              ------------------------------------------------
 
 Dated:                                                                 , 1997
       ----------------------------------------------------------------
 
                                        4
<PAGE>   21
 
     IF SELLING SHARES SUBSEQUENT TO NOVEMBER 3, 1997, A RECORD HOLDER MUST
                    COMPLETE THE FOLLOWING IRREVOCABLE PROXY
 
           PLEASE SIGN THIS TO IRREVOCABLY TRANSFER A PREFERRED STOCK
              PROXY TO A SUBSEQUENT HOLDER OF PREFERRED STOCK WHO
                 WAS NOT A HOLDER OF RECORD ON NOVEMBER 3, 1997
 
                               IRREVOCABLE PROXY
                         with respect to shares of the
                          4.60% Series Preferred Stock
                                       of
                           MISSISSIPPI POWER COMPANY
                  the undersigned hereby irrevocably appoints
 
                      ------------------------------------
                        Type or Print Name of Transferee
 
as attorney and proxy, with full power of substitution, to vote and otherwise
act for and in the name(s) of the undersigned with respect to the Shares
indicated below which were held of record by the undersigned on November 3,
1997, in the manner in which the undersigned would be entitled to vote and
otherwise act in respect of such Shares on any and all matters.
 
     This proxy shall be effective whether or not the Shares indicated below are
tendered in the Offer.
 
     This instrument supersedes and revokes any and all previous appointments of
proxies heretofore made by the undersigned with respect to the Shares indicated
below as to any and all matters. THIS PROXY IS IRREVOCABLE AND IS COUPLED WITH
AN INTEREST.
 
     All authority conferred or agreed to be conferred herein shall survive the
death or incapacity of the undersigned, and any obligation of the undersigned
hereunder shall be binding upon the heirs, executors, administrators, legal and
personal representatives, successors in interest and assigns of the undersigned.
The undersigned understands that tenders of Shares pursuant to any of the
procedures described in the Offer to Purchase and Proxy Statement and in this
Letter of Transmittal and Proxy will constitute a binding agreement between the
undersigned and the Company upon the terms and subject to the conditions of the
Offer.
 

<TABLE>
<S>                                                 <C>
- -------------------------------------------------------------------------------------------------------
                                    DESCRIPTION OF PREFERRED STOCK
- -------------------------------------------------------------------------------------------------------
               CERTIFICATE NUMBER(S)                                 AGGREGATE NUMBER
            (ATTACH LIST IF NECESSARY)                                   OF SHARES
- -------------------------------------------------------------------------------------------------------
 
- -------------------------------------------------------------------------------------------------------
 
- -------------------------------------------------------------------------------------------------------
 
- -------------------------------------------------------------------------------------------------------
                                                    TOTAL:
- -------------------------------------------------------------------------------------------------------

- ------------------------------------------------       ------------------------------------------------
         Signature of Record Holder or                          Signature of Record Holder or
              Authorized Signatory                                   Authorized Signatory
 
- ------------------------------------------------       ------------------------------------------------
               Type or Print Name                                     Type or Print Name
 
Date:                                    ,  1997       Date:                                     , 1997
     ------------------------------------                   -------------------------------------

</TABLE>
 
Tax Identification or Social Security No(s).
                                            -----------------------------------
 
                                        5
<PAGE>   22
  
Must be signed by holder(s) exactly as name(s) appear(s) on the Record Date on
certificate(s) for the Shares or on a security position listing or by person(s)
authorized to become holder(s) by certificates and documents transmitted
herewith. If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation, agent or other person acting in a
fiduciary or representative capacity, please provide the following information
and see Instruction 5.
 
Name:
     ---------------------------------------------------------------------------
                                    (PLEASE PRINT)
 
Capacity:
         -----------------------------------------------------------------------
                                      (FULL TITLE)
 
Address:
         -----------------------------------------------------------------------
                                  (INCLUDE ZIP CODE)
 
Area Code and Tel. No.
                       ---------------------------------------------------------
 
PLEASE COMPLETE IF APPLICABLE:


                           GUARANTEE OF SIGNATURE(S)
                   (IF REQUIRED -- SEE INSTRUCTIONS 1 AND 5)
 Name of Firm:
               -----------------------------------------------------------------
 Authorized Signature:
                        --------------------------------------------------------
 Title:
         -----------------------------------------------------------------------
 Dated:                                                                   , 1997
         -----------------------------------------------------------------
 
     DELIVERY OF THIS LETTER OF TRANSMITTAL AND PROXY TO AN ADDRESS OTHER THAN
AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY. YOU MUST SIGN THIS
LETTER OF TRANSMITTAL AND PROXY IN THE APPROPRIATE SPACE THEREFOR PROVIDED AND,
IF YOU ARE TENDERING ANY SHARES OR VOTING IN FAVOR OF THE PROPOSED AMENDMENT,
COMPLETE THE SUBSTITUTE FORM W-9 SET FORTH BELOW OR A FORM W-8, AS APPLICABLE.
SEE INSTRUCTION 8 AND "IMPORTANT TAX INFORMATION" BELOW.
 
     DO NOT SEND ANY CERTIFICATES TO MERRILL LYNCH & CO., CORPORATE INVESTOR
COMMUNICATIONS, INC., THE SOUTHERN COMPANY, SCS STOCKHOLDER SERVICES OR
MISSISSIPPI POWER COMPANY.
 
     THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL AND PROXY SHOULD
BE READ CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL AND PROXY IS COMPLETED.
QUESTIONS REGARDING AND REQUESTS FOR COPIES OF THE OFFER TO PURCHASE AND PROXY
STATEMENT OR THIS LETTER OF TRANSMITTAL AND PROXY MAY BE DIRECTED TO CORPORATE
INVESTOR COMMUNICATIONS, INC., THE INFORMATION AGENT, AT (888) 881-0526 (TOLL
FREE) OR BANKS AND BROKERS CALL (888) 349-2003.
 
     This Letter of Transmittal and Proxy is to be used (a) if Shares are to be
voted but not tendered, or (b) if certificates for Shares are to be forwarded to
The Bank of New York ("Depositary") or (c) if delivery of tendered Shares (as
defined below) is to be made by book-entry transfer to the Depositary's account
at The Depository Trust Company ("DTC" or the "Book-Entry Transfer Facility")
pursuant to the procedures set forth under the heading "Terms of the
Offer -- Procedure for Tendering Shares" in the Offer to Purchase and Proxy
Statement (as defined below) and an Agent's Message (as defined below) is not
delivered.
 
     Preferred Shareholders who wish to tender Shares but who cannot deliver
their Shares and all other documents required hereby to the Depositary by the
Expiration Date must tender their Shares pursuant to the guaranteed delivery
procedure set forth under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase
 
                                        6
<PAGE>   23
 
and Proxy Statement. See Instruction 2. DELIVERY OF DOCUMENTS TO SOUTHERN, THE
COMPANY OR THE BOOK-ENTRY TRANSFER FACILITY DOES NOT CONSTITUTE A VALID
DELIVERY.
 
[ ]  CHECK HERE IF TENDERED SHARES ARE ENCLOSED HEREWITH.
 
     A Holder tendering Shares pursuant to this Letter of Transmittal and Proxy
     must check one of the following boxes:
 
     [ ] A duly completed, valid and unrevoked proxy indicating a vote FOR the
         Proposed Amendment is included herein.
 
     [ ] A vote FOR the Proposed Amendment will be cast at the Special Meeting.
 
ELIGIBLE INSTITUTIONS OR BROKERS TO COMPLETE ONLY IF APPLICABLE:

 
 [ ]  CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY
      TRANSFER TO THE DEPOSITARY'S ACCOUNT AT THE BOOK-ENTRY TRANSFER
      FACILITY AND COMPLETE THE FOLLOWING:
 
      Name of tendering institution
                                    -----------------------------------------
 
      Account No. at DTC
                         ----------------------------------------------------
 
      Transaction Code No.
                           --------------------------------------------------
 [ ]  CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE
      OF GUARANTEED DELIVERY AND PROXY PREVIOUSLY SENT TO THE DEPOSITARY AND
      COMPLETE THE FOLLOWING:
 
      Name(s) of tendering shareholder(s)
                                          -----------------------------------
 
      Date of execution of Notice of Guaranteed Delivery and Proxy
                                                                   ----------
 
     Name of institution that guaranteed delivery
                                                   --------------------------
 
     If delivery is by book-entry transfer:
 
      Name of tendering institution
                                    -----------------------------------------
 
      Account No. at DTC
                         ----------------------------------------------------
 
      Transaction Code No.
                           --------------------------------------------------

     A holder electing to tender Shares pursuant to a Notice of Guaranteed
     Delivery and Proxy must check one of the following boxes:
 
     [ ]  A duly completed, valid and unrevoked proxy indicating a vote FOR the
          Proposed Amendment was included with the Notice of Guaranteed Delivery
          and Proxy previously sent to the Depositary.
 
     [ ]  A duly completed, valid and unrevoked proxy indicating a vote FOR the
          Proposed Amendment is being delivered pursuant to a Notice of
          Guaranteed Delivery and Proxy previously sent to the Depositary.
 
     [ ]  A valid vote FOR the Proposed Amendment will be cast at the Special
          Meeting.
 
                    NOTE: SIGNATURES MUST BE PROVIDED ABOVE.
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY.
 
                                        7
<PAGE>   24
 
Ladies and Gentlemen:
 
     The abovesigned hereby tenders to The Southern Company, a Delaware
corporation ("Southern"), the shares in the amount set forth in the box above
designated "Description of Shares Tendered" pursuant to Southern's offer to
purchase any and all of the outstanding shares (the "Shares") of the series of
preferred stock of Mississippi Power Company, a Mississippi corporation, and
direct utility subsidiary of Southern (the "Company"), shown on the first page
hereof as to which this Letter of Transmittal and Proxy is applicable (the
"Shares") at the purchase price per Share shown on the first page hereof plus
from the Company a dividend attributable to the period ending on the Payment
Date (as defined in the Offer to Purchase and Proxy Statement), net to the
seller in cash, upon the terms and subject to the conditions set forth in the
Offer to Purchase and Proxy Statement, dated November 3, 1997 (the "Offer to
Purchase and Proxy Statement"), receipt of which is hereby acknowledged, and in
this Letter of Transmittal and Proxy (which as to the Shares, together with the
Offer to Purchase and Proxy Statement, constitutes the "Offer"). PREFERRED
SHAREHOLDERS WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT TO THE COMPANY'S ARTICLES OF INCORPORATION, AS
AMENDED, AS SET FORTH IN THE OFFER TO PURCHASE AND PROXY STATEMENT (THE
"PROPOSED AMENDMENT"). THE OFFER IS CONDITIONED UPON THE PROPOSED AMENDMENT
BEING APPROVED AND ADOPTED AT THE SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON
DECEMBER 10, 1997, OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR
POSTPONED (THE "SPECIAL MEETING").  See "Proposed Amendment and Proxy
Solicitation," "Terms of the Offer -- Extension of Tender Period; Termination;
Amendments" and "Terms of the Offer -- Certain Conditions of the Offer" in the
Offer to Purchase and Proxy Statement.
 
     Subject to, and effective upon, acceptance for payment of and payment for
the Shares tendered herewith in accordance with the terms and subject to the
conditions of the Offer (including, if the Offer is extended or amended, the
terms and conditions of any such extension or amendment), the abovesigned hereby
sells, assigns and transfers to, or upon the order of, Southern all right, title
and interest in and to all the Shares that are being tendered hereby and hereby
constitutes and appoints The Bank of New York (the "Depositary") the true and
lawful agent and attorney-in-fact of the abovesigned with respect to such
Shares, with full power of substitution (such power of attorney being an
irrevocable power coupled with an interest), to (a) deliver certificates for
such Shares, or transfer ownership of such Shares on the account books
maintained by the Book-Entry Transfer Facility, together, in any such case, with
all accompanying evidences of transfer and authenticity, to or upon the order of
Southern, (b) present such Shares for registration and transfer on the books of
the Company and (c) receive all benefits and otherwise exercise all rights of
beneficial ownership of such Shares, all in accordance with the terms of the
Offer. The Depositary will act as agent for tendering shareholders for the
purpose of receiving payment from Southern and transmitting payment to tendering
shareholders.
 
     The abovesigned hereby represents and warrants that the abovesigned has
full power and authority to tender, sell, assign and transfer the Shares
tendered hereby and that, when and to the extent the same are accepted for
payment by Southern, Southern will acquire good, marketable and unencumbered
title thereto, free and clear of all liens, restrictions, charges, encumbrances,
conditional sales agreements or other obligations relating to the sale or
transfer thereof, and the same will not be subject to any adverse claims. The
abovesigned will, upon request, execute and deliver any additional documents
deemed by the Depositary or Southern to be necessary or desirable to complete
the sale, assignment and transfer of the Shares tendered hereby.
 
     All authority herein conferred or agreed to be conferred shall not be
affected by and shall survive the death, bankruptcy or incapacity of the
abovesigned, and any obligations of the abovesigned hereunder shall be binding
upon the heirs, legal representatives, successors, assigns, executors and
administrators of the abovesigned. Except as stated in the Offer, this tender is
irrevocable.
 
     The abovesigned understands that tenders of Shares pursuant to any one of
the procedures described under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase and Proxy Statement and in the
instructions hereto will constitute the abovesigned's acceptance of the terms
and conditions of the Offer, including the abovesigned's representation and
warranty that (a) the abovesigned has a net long position in the Shares being
tendered within the meaning of Rule 14e-4 promulgated under the Securities
Exchange Act of 1934, as amended, and (b) the tender of such Shares complies
with such Rule 14e-4. Southern's acceptance for payment of Shares tendered
pursuant to the Offer will constitute a binding agreement between the
abovesigned and Southern upon the terms and subject to the conditions of the
Offer.
 
     The abovesigned recognizes that, under certain circumstances set forth in
the Offer to Purchase and Proxy Statement, Southern may terminate or amend the
Offer or may not be required to purchase any of the Shares tendered hereby. In
either event, the abovesigned understands that certificate(s) for any Shares not
tendered or not purchased will be returned to the abovesigned.
 
                                        8
<PAGE>   25
  
     Unless otherwise indicated in the box below under the heading "Special
Payment Instructions," please issue the check for the purchase price of any
Shares purchased, and/or return any Shares not tendered or not purchased, in the
name(s) of the abovesigned (and, in the case of Shares tendered by book-entry
transfer, by credit to the account of the abovesigned at the Book-Entry Transfer
Facility). Similarly, unless otherwise indicated in the box below under the
heading "Special Delivery Instructions," please mail the check for the purchase
price of any Shares purchased and/or any certificates for Shares not tendered or
not purchased (and accompanying documents, as appropriate) to the abovesigned at
the address shown below the abovesigned's signature(s). In the event that both
"Special Payment Instructions" and "Special Delivery Instructions" are
completed, please issue the check for the purchase price of any Shares purchased
and/or return any Shares not tendered or not purchased in the name(s) of, and
mail said check and/or any certificates to, the person(s) so indicated. The
abovesigned recognizes that Southern has no obligation, pursuant to the "Special
Payment Instructions," to transfer any Shares from the name of the registered
holder(s) thereof if Southern does not accept for payment any of the Shares so
tendered.
 
COMPLETE ONLY IF APPLICABLE:
 
                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 4, 6 AND 7)
 
  To be completed ONLY if the check for the purchase price of Shares purchased,
the certificates for Shares not tendered or not purchased or the check for the
Special Cash Payment are to be issued in the name of someone other than the
abovesigned.
 
Issue  [ ] Check and/or  [ ] Certificate(s) to:
 
Name
      --------------------------------------------------------
                         (PLEASE PRINT)
 
Address
        ------------------------------------------------------
 
        ------------------------------------------------------
                       (INCLUDE ZIP CODE)
 
        ------------------------------------------------------
         (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NUMBER)
 
                     SPECIAL DELIVERY INSTRUCTIONS
                   (SEE INSTRUCTIONS 4, 6 AND 7)
 
  To be completed ONLY if the check for the purchase price of Shares purchased,
the certificates for Shares not tendered or not purchased or the check for the
Special Cash Payment are to be mailed to someone other than the abovesigned or
to the abovesigned at an address other than that shown below the abovesigned's
signature(s).
 
Mail  [ ] Check and/or  [ ] Certificate(s) to:
 
Name
      --------------------------------------------------------
                         (PLEASE PRINT)
 
Address
        ------------------------------------------------------
 
        ------------------------------------------------------
                       (INCLUDE ZIP CODE)
 
 
COMPLETE ONLY IF YOUR SHARES ARE LOST:
 
                             LOST CERTIFICATES BOX
 
   [ ] CHECK HERE IF ANY OF THE CERTIFICATES REPRESENTING SHARES THAT YOU OWN
       AND WISH TO TENDER HAVE BEEN LOST, DESTROYED OR STOLEN. (SEE
       INSTRUCTION 12.)
 
       Number of Shares represented by lost, destroyed or stolen certificates:
       
       -------------
    
                                        9
<PAGE>   26
 
COMPLETE ONLY IF APPLICABLE:
                         SOLICITED TENDERS AND PROXIES
                              (SEE INSTRUCTION 10)
        As provided in Instruction 10, Southern will pay a solicitation fee
   of an amount equal to 1.50% of par value per Share for any Shares
   tendered, accepted for payment and paid for pursuant to the Offer (except
   that for transactions for beneficial owners whose ownership equals or
   exceeds 2,500 Shares, Southern will pay a solicitation fee of an amount
   equal to 1.00% of the par value per Share). If the Proposed Amendment is
   approved and adopted, the Company agrees to pay a separate fee of an
   amount equal to 0.50% of the par value per Share for Shares that are not
   tendered pursuant to the Offer but which are voted in favor of the
   Proposed Amendment (except that with respect to transactions for
   beneficial owners whose ownership equals or exceeds 2,500 Shares, the
   Company will pay a separate fee of an amount equal to 0.25% of the par
   value of such Shares). With respect to fees payable pursuant to this
   paragraph involving transactions for beneficial owners whose ownership is
   less than 2,500 Shares, any fees payable hereunder shall be paid in full
   to the Dealer Manager unless a Soliciting Dealer is designated (as herein
   described), in which case such fee shall be payable in full to such
   designated Soliciting Dealer (which designated Soliciting Dealer may be
   the Dealer Manager). With respect to fees payable pursuant to this
   paragraph involving transactions for beneficial owners whose ownership
   equals or exceeds 2,500 Shares, any fees payable hereunder shall be paid
   in full to the Dealer Manager unless a Soliciting Dealer is designated, in
   which case 80% of such fee shall be paid to the Dealer Manager and 20% of
   such fee shall be paid to the designated Soliciting Dealer (which
   designated Soliciting Dealer may be the Dealer Manager). However,
   Soliciting Dealers will not be entitled to a solicitation fee for Shares
   beneficially owned by such Soliciting Dealer.
 
        The undersigned represents that the Soliciting Dealer which solicited
   and obtained this tender or proxy is:
 
   Name of Firm:
                 ------------------------------------------------------------
                                 (PLEASE PRINT)
 
   Name of Individual Broker
   or Financial Consultant:
                            -------------------------------------------------
 
   Telephone Number of Broker
   or Financial Consultant:  
                            -------------------------------------------------
 
   Identification Number (if known):
                                     ----------------------------------------
 
   Address:
            -----------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
COMPLETE ONLY IF CUSTOMER'S SHARES HELD IN NOMINEE NAME ARE TENDERED:
 
<TABLE>
<S>                                                <C>
           NAME OF BENEFICIAL OWNER                           NUMBER OF SHARES TENDERED
                              (ATTACH ADDITIONAL LIST IF NECESSARY)
- -----------------------------------------------    -----------------------------------------------
- -----------------------------------------------    -----------------------------------------------
- -----------------------------------------------    -----------------------------------------------
</TABLE>  
  
 
     The acceptance of compensation by such Soliciting Dealer will constitute a
representation by it that (a) it has complied with the applicable requirements
of the Securities Exchange Act of 1934, as amended, and the applicable rules and
regulations thereunder, in connection with such solicitation; (b) it is entitled
to such compensation for such solicitation under the terms and conditions of the
Offer to Purchase and Proxy Statement; (c) in soliciting tenders of Shares, it
has used no solicitation materials other than those furnished by Southern; and
(d) if it is a foreign broker or dealer not eligible for membership in the
National Association of Securities Dealers, Inc. (the "NASD"), it has agreed to
conform to the NASD's Rules of Fair Practice in making solicitations.
 
     The payment of compensation to any Soliciting Dealer is dependent on such
Soliciting Dealer returning a Notice of Solicited Tenders and Proxies to the
Depositary.
 
     THIS LETTER OF TRANSMITTAL AND PROXY IS TO BE USED FOR THE TENDER OF SHARES
OF THE 4.60% SERIES (AS DEFINED IN THE OFFER TO PURCHASE AND PROXY STATEMENT)
ONLY. ANY PERSON DESIRING TO TENDER OR VOTE SHARES OF ANY OTHER SERIES OF
 
                                       10
<PAGE>   27
 
PREFERRED STOCK FOR WHICH SOUTHERN IS MAKING A TENDER OFFER AND/OR SOLICITING A
PROXY MUST SUBMIT A LETTER OF TRANSMITTAL AND PROXY RELATING TO THAT SPECIFIC
SERIES.
 
    PLEASE COMPLETE SUBSTITUTE FORM W-9 BELOW OR A FORM W-8, AS APPLICABLE.
 
SIGN HERE:
          ---------------------------------------------
                      SIGNATURE OF OWNER(S)
 
          ---------------------------------------------
                      SIGNATURE OF OWNER(S)
 
                                  INSTRUCTIONS
 
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. GUARANTEE OF SIGNATURES.  Except as otherwise provided below, all
signatures on this Letter of Transmittal and Proxy must be guaranteed by a firm
that is a member of a registered national securities exchange or the NASD, or by
a commercial bank or trust company having an office or correspondent in the
United States which is a participant in an approved Medallion Signature
Guarantee Program (each of the foregoing being referred to as an "Eligible
Institution"). Signatures on this Letter of Transmittal and Proxy need not be
guaranteed (a) if this Letter of Transmittal and Proxy is signed by the
registered holder(s) of the Shares (which term, for purposes of this document,
shall include any participant in the Book-Entry Transfer Facility whose name
appears on a security position listing as the owner of Shares) tendered herewith
and such holder(s) has not completed the box above under the heading "Special
Payment Instructions" or the box above under the heading "Special Delivery
Instructions" on this Letter of Transmittal and Proxy, (b) if such Shares are
tendered for the account of an Eligible Institution or (c) if this Letter of
Transmittal and Proxy is being used solely for the purpose of voting Shares
which are not being tendered pursuant to the Offer. See Instruction 5.
 
     2. DELIVERY OF LETTER OF TRANSMITTAL AND PROXY AND SHARES.  This Letter of
Transmittal and Proxy is to be used if (a) certificates are to be forwarded
herewith, (b) delivery of Shares to be made by book-entry transfer pursuant to
the procedures set forth under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase and Proxy Statement and an Agent's
Message (as defined below) is not delivered or (c) Shares are being voted in
connection with the Offer. Certificates for all physically delivered Shares, or
a confirmation of a book-entry transfer into the Depositary's account at the
Book-Entry Transfer Facility of all Shares delivered electronically, as well as
a properly completed and duly executed Letter of Transmittal and Proxy, and any
other documents required by this Letter of Transmittal and Proxy, must be
received by the Depositary at one of its addresses set forth on the front page
of this Letter of Transmittal and Proxy on or prior to the Expiration Date (as
defined in the Offer to Purchase and Proxy Statement) with respect to all
Shares. Preferred Shareholders who wish to tender their Shares yet who cannot
deliver their Shares and all other required documents to the Depositary on or
prior to the Expiration Date must tender their Shares pursuant to the guaranteed
delivery procedure set forth under the heading "Terms of the Offer -- Procedure
for Tendering Shares" in the Offer to Purchase and Proxy Statement. Pursuant to
such procedure: (a) such tender must be made by or through an Eligible
Institution, (b) a properly completed and duly executed Notice of Guaranteed
Delivery and Proxy in the form provided by Southern (with any required signature
guarantees) must be received by the Depositary on or prior to the Expiration
Date and (c) the certificates for all physically delivered Shares, or a
confirmation of a book-entry transfer into the Depositary's account at the
Book-Entry Transfer Facility of all Shares delivered electronically, together
with a properly completed and duly executed Letter of Transmittal and Proxy, and
any other documents required by this Letter of Transmittal and Proxy must be
received by the Depositary by 5:00 p.m. (New York City time) within three New
York Stock Exchange trading days after the date of execution of such Notice of
Guaranteed Delivery and Proxy, all as provided under the heading "Terms of the
Offer -- Procedure for Tendering Shares" in the Offer to Purchase and Proxy
Statement. Tenders by book-entry transfer may also be made by delivering an
Agent's Message in lieu of this Letter of Transmittal and Proxy. The term
"Agent's Message" means a message, transmitted by the Book-Entry Transfer
Facility, received by the Depositary and forming a part of the book-entry
transfer when a tender is initiated, which states that the Book-Entry Transfer
Facility has received an express acknowledgment from a participant tendering
Shares that such participant has received and agrees to be bound by the terms of
this Letter of Transmittal and Proxy and that Southern may enforce such
agreement against such participant.
 
     THE METHOD OF DELIVERY OF SHARES AND ALL OTHER REQUIRED DOCUMENTS IS AT THE
OPTION AND RISK OF THE TENDERING PREFERRED SHAREHOLDER. IF CERTIFICATES FOR
SHARES ARE SENT BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY
INSURED, IS RECOMMENDED.
 
                                       11
<PAGE>   28
 
     No alternative, conditional or contingent tenders will be accepted. See
"Terms of the Offer -- Number of Shares; Purchase Prices; Expiration Date;
Dividends" in the Offer to Purchase and Proxy Statement. By executing this
Letter of Transmittal and Proxy, the tendering shareholder waives any right to
receive any notice of the acceptance for payment of the Shares.
 
     3. VOTING.  PREFERRED SHAREHOLDERS (INCLUDING PREFERRED SHAREHOLDERS WHO
ACQUIRE SHARES SUBSEQUENT TO THE RECORD DATE) WHO WISH TO TENDER THEIR SHARES
PURSUANT TO THE OFFER MUST VOTE IN FAVOR OF THE PROPOSED AMENDMENT. THE OFFER IS
CONDITIONED UPON THE PROPOSED AMENDMENT BEING APPROVED AND ADOPTED AT THE
SPECIAL MEETING.  In addition, Preferred Shareholders have the right to vote for
the Proposed Amendment regardless of whether they tender their Shares by casting
their vote and duly executing this Letter of Transmittal and Proxy or by voting
in person at the Special Meeting. By executing a Notice of Guaranteed Delivery
and Proxy, a Preferred Shareholder is deemed to have tendered the Shares
described in such Notice of Guaranteed Delivery and Proxy and to have voted such
Shares in accordance with the proxy contained therein. If no vote is indicated
on an otherwise properly executed proxy contained within this Letter of
Transmittal and Proxy (or within a Notice of Guaranteed Delivery and Proxy),
then all Shares in respect of such proxy will be voted in favor of the Proposed
Amendment. See "Proposed Amendment and Proxy Solicitation" in the Offer to
Purchase and Proxy Statement. The Offer is being sent to all persons in whose
names Shares are registered on the books of the Company on the Record Date and
transferees thereof. Preferred Shareholders who purchase or whose purchase is
registered after the Record Date and who wish to tender in the Offer must
arrange with their seller to receive a proxy from the holder of record of such
Shares on the Record Date. Any holder of Shares held of record on the Record
Date in the name of another must establish to the satisfaction of the Company
his entitlement to exercise or transfer such Proxy. This will ordinarily require
an assignment by such record holder in blank or, if not in blank, to and from
each successive transferee, including the holder, with each signature guaranteed
by an Eligible Institution. See Instruction 5. In order to facilitate receipt of
proxies, Shares shall, during the period which commences on November 4, 1997
(two business days prior to the Record Date) and which will end at the close of
business on the Expiration Date, trade in the over-the-counter market with a
proxy providing the transferee with the right to vote such acquired Shares in
the Proxy Solicitation. No record date is fixed for determining which persons
are permitted to tender Shares. However, only the holders of record, or holders
who acquire an assignment of proxy from such holders, are permitted to vote for
the Proposed Amendment and thereby validly tender Shares pursuant to the Offer.
Any person who is the beneficial owner but not the record holder of Shares must
arrange for the record transfer of such Shares prior to tendering or direct the
record holder to tender on behalf of the beneficial owner.
 
     4. PARTIAL TENDERS (NOT APPLICABLE TO SHAREHOLDERS WHO TENDER BY BOOK-ENTRY
TRANSFER).  If fewer than all the Shares represented by any certificate
delivered to the Depositary are to be tendered, fill in the number of Shares
that are to be tendered in the box above under the heading "Description of
Shares Tendered." In such case, a new certificate for the remainder of the
Shares represented by the old certificate will be sent to the person(s) signing
this Letter of Transmittal and Proxy, unless otherwise provided in the box above
under the heading "Special Payment Instructions" or "Special Delivery
Instructions," as promptly as practicable following the expiration or
termination of the Offer. All Shares represented by certificates delivered to
the Depositary will be deemed to have been tendered unless otherwise indicated.
 
     5. SIGNATURES ON THIS LETTER OF TRANSMITTAL AND PROXY AND/OR NOTICE OF
GUARANTEED DELIVERY AND PROXY; STOCK POWERS AND ENDORSEMENTS.  If either this
Letter of Transmittal and Proxy or the Notice of Guaranteed Delivery and Proxy
(together, the "Tender and Proxy Documents") is signed by the registered
holder(s) of the Shares tendered hereby, the signature(s) must correspond with
the name(s) as written on the face of the certificates without alteration,
enlargement or any change whatsoever.
 
     If any of the Shares tendered or voted under either Tender and Proxy
Document are held of record by two or more persons, all such persons must sign
such Tender and Proxy Document.
 
     If any of the Shares tendered or voted under either Tender and Proxy
Document are registered in different names or different certificates, it will be
necessary to complete, sign and submit as many separate applicable Tender and
Proxy Documents as there are different registrations or certificates.
 
     If either Tender and Proxy Document is signed by the registered holder(s)
of the Shares tendered hereby, no endorsements of certificates or separate stock
powers are required unless payment of the purchase price is to be made to, or
Shares not tendered or not purchased are to be registered in the name of, any
person other than the registered holder(s). Signatures on any such certificates
or stock powers must be guaranteed by an Eligible Institution. See Instruction
1.
 
                                       12
<PAGE>   29
 
     If this Letter of Transmittal and Proxy is signed by a person other than
the registered holder(s) of the Shares tendered hereby, certificates must be
endorsed or accompanied by appropriate stock powers, in either case, signed
exactly as the name(s) of the registered holder(s) appear(s) on the certificates
for such Shares. Signature(s) on any such certificates or stock powers must be
guaranteed by an Eligible Institution. See Instruction 1.
 
     If either Tender and Proxy Document or any certificate or stock power is
signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or representative
capacity, such person should so indicate when signing, and proper evidence
satisfactory to Southern of the authority of such person so to act must be
submitted.
 
     6. STOCK TRANSFER TAXES.  Except as set forth in this Instruction 6,
Southern will pay or cause to be paid any stock transfer taxes with respect to
the sale and transfer of any Shares to it or its order pursuant to the Offer.
If, however, payment of the purchase price is to be made to, or Shares not
tendered or not purchased are to be registered in the name of, any person other
than the registered holder(s), or if tendered Shares are registered in the name
of any person other than the person(s) signing this Letter of Transmittal and
Proxy, the amount of any stock transfer taxes (whether imposed on the registered
holder(s), such other person or otherwise) payable on account of the transfer to
such person will be deducted from the purchase price unless satisfactory
evidence of the payment of such taxes, or exemption therefrom, is submitted. See
"Terms of the Offer -- Acceptance of Shares for Payment and Payment of Purchase
Price and Dividends" in the Offer to Purchase and Proxy Statement. EXCEPT AS
PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY TO AFFIX TRANSFER TAX
STAMPS TO THE CERTIFICATES REPRESENTING SHARES TENDERED HEREBY.
 
     7. SPECIAL PAYMENT AND DELIVERY INSTRUCTIONS.  If the check for the
purchase price of any Shares purchased is to be issued in the name of, any
Shares not tendered or not purchased are to be returned to or the check for the
Special Cash Payment is to be issued in the name of, a person other than the
person(s) signing this Letter of Transmittal and Proxy or if the check and/or
any certificate for Shares not tendered or not purchased are to be mailed to
someone other than the person(s) signing this Letter of Transmittal and Proxy or
to an address other than that shown in the box above under the heading "Name(s)
and Address(es) of Registered Holder(s)," then the "Special Payment
Instructions" and/or "Special Delivery Instructions" on this Letter of
Transmittal and Proxy should be completed. Preferred Shareholders tendering
Shares by book-entry transfer will have any Shares not accepted for payment
returned by crediting the account maintained by such Preferred Shareholder at
the Book-Entry Transfer Facility.
 
     8. SUBSTITUTE FORM W-9 AND FORM W-8.  A tendering Preferred Shareholder and
a Preferred Shareholder voting in favor of the Proposed Amendment (but not
tendering) is required to provide the Depositary with (i) in the case of a
United States Preferred Shareholder, a correct Taxpayer Identification Number
("TIN") and a certification that the IRS has not notified such shareholder that
he is subject to backup withholding on Substitute Form W-9, or (ii) in the case
of a foreign Preferred Shareholder, a properly completed Form W-8, as discussed
below under "Important Tax Information." Failure to provide the information on
either Substitute Form W-9 or Form W-8 may subject the Preferred Shareholder to
a $50 penalty imposed by the Internal Revenue Service and to 31% Federal income
tax backup withholding on the gross amount payable. The box in Part 2 of
Substitute Form W-9 may be checked if the Preferred Shareholder has not been
issued a TIN and has applied for a number or intends to apply for a number in
the near future. If the box in Part 2 is checked and the Depositary is not
provided with a TIN by the time of payment, the Depositary will withhold 31% of
the gross amount otherwise payable until a TIN is provided to the Depositary.
 
     9. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.  Any questions or requests
for assistance may be directed to the Information Agent or the Dealer Manager at
their respective telephone numbers and addresses listed below. Requests for
additional copies of the Offer to Purchase and Proxy Statement, this Letter of
Transmittal and Proxy or other tender offer materials may be directed to the
Information Agent or the Dealer Manager and such copies will be furnished
promptly at Southern's expense. Preferred Shareholders may also contact their
local broker, dealer, commercial bank or trust company for assistance concerning
the Offer.
 
     10. SOLICITED TENDERS AND PROXIES.  Southern will pay a solicitation fee of
an amount equal to 1.50% of the par value per Share for Shares that are
tendered, accepted for payment and paid for pursuant to the Offer (except that
for transactions for beneficial owners whose ownership equals or exceeds 2,500
Shares, Southern will pay a solicitation fee of an amount equal to 1.00% of the
par value per Share). If the Proposed Amendment is approved and adopted, the
Company agrees to pay a separate fee of an amount equal to 0.50% of the par
value per Share for Shares that are not tendered pursuant to the Offer but which
are voted in favor of the Proposed Amendment (except that with respect to
transactions for beneficial owners whose ownership equals or exceeds 2,500
Shares, the Company will pay a separate fee of an amount equal to 0.25% of the
par value of such Shares). With respect to fees payable pursuant to this
paragraph involving transactions for beneficial owners whose ownership is less
than 2,500 Shares, any fees payable hereunder shall be paid in full to the
Dealer Manager unless a Soliciting Dealer is designated (as herein described),
in which case such fee
 
                                       13
<PAGE>   30
 
shall be payable in full to such designated Soliciting Dealer (which designated
Soliciting Dealer may be the Dealer Manager). With respect to fees payable
pursuant to this paragraph involving transactions for beneficial owners whose
ownership equals or exceeds 2,500 Shares, any fees payable hereunder shall be
paid in full to the Dealer Manager unless a Soliciting Dealer is designated, in
which case 80% of such fee shall be paid to the Dealer Manager and 20% of such
fee shall be paid to the designated Soliciting Dealer (which designated
Soliciting Dealer may be the Dealer Manager). A designated Soliciting Dealer
shall be named hereunder under the heading "Solicited Tenders and Proxies," and
shall have solicited and obtained the tender or proxy, and shall also be (a) any
broker or dealer in securities, including the Dealer Manager in its capacity as
a dealer or broker, which is a member of any national securities exchange or of
the NASD, (b) any foreign broker or dealer not eligible for membership in the
NASD which agrees to conform to the NASD's Rules of Fair Practice in soliciting
tenders outside the United States to the same extent as though it were an NASD
member, or (c) any bank or trust company (each of which is referred to herein as
a "Soliciting Dealer"). No such fee shall be payable to a Soliciting Dealer with
respect to the tender of Shares by a holder unless the Letter of Transmittal and
Proxy accompanying such tender designates such Soliciting Dealer. No such fee
shall be payable to a Soliciting Dealer in respect of Shares registered in the
name of such Soliciting Dealer unless such Shares are held by such Soliciting
Dealer as nominee and such Shares are being tendered for the benefit of one or
more beneficial owners identified on the Letter of Transmittal and Proxy or on
the Notice of Solicited Tenders and Proxies (included in the materials provided
to brokers and dealers). No such fee shall be payable to a Soliciting Dealer
with respect to the tender of Shares by the holder of record, for the benefit of
the beneficial owner, unless the beneficial owner has designated such Soliciting
Dealer. If tendered Shares are being delivered by book-entry transfer, the
Soliciting Dealer must return a Notice of Solicited Tenders and Proxies to the
Depositary within three business days after expiration of the Offer to receive a
solicitation fee. No such fee shall be payable to a Soliciting Dealer if such
Soliciting Dealer is required for any reason to transfer the amount of such fee
to a depositing holder (other than itself). No such fee shall be paid to a
Soliciting Dealer with respect to Shares tendered for such Soliciting Dealer's
own account. No broker, dealer, bank, trust company or fiduciary shall be deemed
to be the agent of Southern, the Company, the Depositary, the Information Agent
or the Dealer Manager for purposes of the Offer.
 
     Soliciting Dealers will include any organizations described in clauses (a),
(b) or (c) above even when the activities of such organization in connection
with the Offer consist solely of forwarding to clients materials relating to the
Offer, including this Letter of Transmittal and Proxy, and tendering Shares as
directed by beneficial owners thereof. No Soliciting Dealer is required to make
any recommendation to holders of Shares as to whether to tender or refrain from
tendering in the Offer. No assumption is made, in making payment to any
Soliciting Dealer, that its activities in connection with the Offer included any
activities other than those described above, and for all purposes noted in all
materials relating to the Offer, the term "solicit" shall be deemed to mean no
more than "processing shares tendered," "processing shares voted" or "forwarding
to customers materials regarding the Offer."
 
     11. IRREGULARITIES.  All questions as to the form of documents and the
validity, eligibility (including time of receipt) and acceptance of any tender
of Shares will be determined by Southern, in its sole discretion, and its
determination shall be final and binding. Southern reserves the absolute right
to reject any and all tenders of Shares that it determines are not in proper
form or the acceptance for payment of or payment for Shares that may, in the
opinion of Southern's counsel, be unlawful. Southern also reserves the absolute
right to waive any of the conditions to the Offer or any defect or irregularity
in any tender of Shares and Southern's interpretation of the terms and
conditions of the Offer (including these instructions) shall be final and
binding. Unless waived, any defects or irregularities in connection with tenders
must be cured within such time as Southern shall determine. None of Southern,
the Company, the Dealer Manager, the Depositary, the Information Agent or any
other person shall be under any duty to give notice of any defect or
irregularity in tenders, nor shall any of them incur any liability for failure
to give any such notice. Tenders will not be deemed to have been made until all
defects and irregularities have been cured or waived.
 
     12. LOST, DESTROYED OR STOLEN CERTIFICATES.  If any of your certificate(s)
for Shares have been lost, stolen or destroyed, please call SCS Stockholder
Services collect at 404-506-0967. You may need to complete an Affidavit of Loss
with respect to the lost certificate(s) (which will be provided by SCS
Stockholder Services) and payment of an indemnity bond premium fee may be
required. The tender of Shares pursuant to this Letter of Transmittal and Proxy
will not be valid unless prior to the Expiration Date: (a) such procedures have
been completed and a replacement certificate for the Shares has been delivered
to the Depositary or (b) a Notice of Guaranteed Delivery and Proxy has been
delivered to the Depositary. See Instruction 2.
 
     IMPORTANT:  THIS LETTER OF TRANSMITTAL AND PROXY, DULY EXECUTED, TOGETHER
WITH, IF APPLICABLE, CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY TRANSFER, AND
ALL OTHER REQUIRED DOCUMENTS MUST BE RECEIVED BY THE DEPOSITARY, OR, IF
APPLICABLE, THE NOTICE OF GUARANTEED DELIVERY AND PROXY MUST BE RECEIVED BY THE
DEPOSITARY, ON OR PRIOR TO THE EXPIRATION DATE.
 
                                       14
<PAGE>   31
 
                           IMPORTANT TAX INFORMATION
 
     Under United States Federal income tax law, a Preferred Shareholder whose
tendered Shares are accepted for payment or who will receive a Special Cash
Payment as a result of voting in favor of the Proposed Amendment is required to
provide the Depositary (as payer) with either such Preferred Shareholder's
correct TIN and a certification that the IRS has not notified such shareholder
that he is subject to backup withholding on Substitute Form W-9 below or a
properly completed Form W-8. If such Preferred Shareholder is an individual, the
TIN is his or her social security number. For a business or other entity, the
TIN is its federal employer identification number. If the Depositary is not
provided with the correct TIN or properly completed Form W-8, the Preferred
Shareholder may be subject to a $50 penalty imposed by the Internal Revenue
Code. In addition, payments that are made to such Preferred Shareholder with
respect to Shares purchased pursuant to the Offer may be subject to 31% backup
withholding.
 
     Certain Preferred Shareholders (including, among others, all corporations
and certain foreign individuals) are exempt from backup withholding. For a
corporate United States Preferred Shareholder to qualify for such exemption,
such Preferred Shareholder must provide the Depositary with a properly completed
and executed Substitute Form W-9 attesting to its exempt status. In order for a
foreign Preferred Shareholder to qualify as an exempt recipient, such Preferred
Shareholder must submit to the Depositary a properly completed Internal Revenue
Service Form W-8, signed under penalties of perjury, attesting to that Preferred
Shareholder's exempt status. A Form W-8 can be obtained from the Depositary. See
the enclosed Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9 for additional instructions.
 
     If Federal income tax backup withholding applies, the Depositary is
required to withhold 31% of any payments made to the Preferred Shareholder.
Backup withholding is not an additional tax. Rather, the Federal income tax
liability of persons subject to backup withholding will be reduced by the amount
of the tax withheld. If withholding results in an overpayment of taxes, a refund
may be obtained from the Internal Revenue Service.
 
PURPOSE OF SUBSTITUTE FORM W-9 AND FORM W-8
 
     To avoid backup withholding on a Special Cash Payment or payments that are
made to a Preferred Shareholder with respect to Shares purchased pursuant to the
Offer, the Preferred Shareholder is required to notify the Depositary of his or
her correct TIN by completing the Substitute Form W-9 attached hereto certifying
that the TIN provided on Substitute Form W-9 is correct and that (a) the
Preferred Shareholder has not been notified by the Internal Revenue Service that
he or she is subject to Federal income tax backup withholding as a result of
failure to report all interest or dividends or (b) the Internal Revenue Service
has notified the Preferred Shareholder that he or she is no longer subject to
Federal income tax backup withholding. Foreign Preferred Shareholders must
submit a properly completed Form W-8 in order to avoid the applicable backup
withholding; provided, however, that backup withholding will not apply to
foreign Preferred Shareholders subject to withholding under other provisions of
the Code on the Special Cash Payment or on gross payments received pursuant to
the Offer. Foreign Preferred Shareholders that submit a properly completed Form
W-8 may nevertheless be subject to withholding under other provisions of the
Code on the payments received by them.
 
                                       15
<PAGE>   32
 
WHAT NUMBER TO GIVE THE DEPOSITARY
 
     The Preferred Shareholder is required to give the Depositary the TIN of the
registered owner of the Shares. If the Shares are in more than one name or are
not in the name of the actual owner, consult the enclosed Guidelines for
Certification of Taxpayer Identification Number on Substitute Form W-9 for
additional guidance on which number to report.
 
                       PAYER'S NAME: THE BANK OF NEW YORK
 

<TABLE>
<S>                                <C>                                                           <C>

                                     PART 1--PLEASE PROVIDE YOUR TIN IN THE BOX AT RIGHT AND      ----------------------------
  SUBSTITUTE                         CERTIFY BY SIGNING AND DATING BELOW.                            SOCIAL SECURITY NUMBER
   FORM W-9
                                                                                                               OR
                                                                                                  ----------------------------
                                                                                                   EMPLOYER IDENTIFICATION TIN
                                     --------------------------------------------------------------------------------------------   
                                     NAME (PLEASE PRINT)                                                    PART 2 --
                                                        --------------------------------------
                                     ADDRESS                                                            AWAITING TIN [ ]
                                             -------------------------------------------------
                                     CITY                                     STATE
                                          ------------------------------------      ----------
                                     ZIP CODE
                                              -------------------------
                                     --------------------------------------------------------------------------------------------   
  DEPARTMENT OF THE TREASURY         PART 3 -- CERTIFICATION -- UNDER PENALTIES OF PERJURY, I CERTIFY THAT:
  INTERNAL REVENUE SERVICE           
                                     (1) THE NUMBER SHOWN ON THIS FORM IS MY CORRECT TAXPAYER IDENTIFICATION NUMBER (OR A TIN
                                     HAS NOT BEEN ISSUED TO ME BUT I HAVE MAILED OR DELIVERED AN APPLICATION TO RECEIVE A TIN OR
                                     INTEND TO DO SO IN THE NEAR FUTURE), (2) I AM NOT SUBJECT TO BACKUP WITHHOLDING EITHER
                                     BECAUSE I HAVE NOT BEEN NOTIFIED BY THE INTERNAL REVENUE SERVICE (THE "IRS") THAT I AM
                                     SUBJECT TO BACKUP WITHHOLDING AS A RESULT OF A FAILURE TO REPORT ALL INTEREST OR DIVIDENDS
                                     OR THE IRS HAS NOTIFIED ME THAT I AM NO LONGER SUBJECT TO BACKUP WITHHOLDING AND (3) ALL
                                     OTHER INFORMATION PROVIDED ON THIS FORM IS TRUE, CORRECT AND COMPLETE.
                                     SIGNATURE 
                                                ---------------------------------------------------------------------------------
                                     DATE                        , 1997
                                           ---------------------

                                     YOU MUST CROSS OUT ITEM (2) ABOVE IF YOU HAVE BEEN NOTIFIED BY THE IRS THAT YOU ARE
                                     CURRENTLY SUBJECT TO BACKUP WITHHOLDING BECAUSE OF UNDERREPORTING INTEREST OR DIVIDENDS ON
                                     YOUR TAX RETURN.
                                     --------------------------------------------------------------------------------------------   
                                     NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING OF 31% OF
  PAYER'S REQUEST FOR                ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER OR PROXY SOLICITATION. PLEASE REVIEW THE
  TAXPAYER IDENTIFICATION            ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM
  NUMBER ("TIN") AND CERTIFICATION   W-9 FOR ADDITIONAL DETAILS. YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE
                                     BOX IN PART 2 OF SUBSTITUTE FORM W-9.
                                                         CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER:
                                     I CERTIFY UNDER PENALTIES OF PERJURY THAT A TAXPAYER IDENTIFICATION NUMBER HAS NOT BEEN
                                     ISSUED TO ME AND EITHER (1) I HAVE MAILED OR DELIVERED AN APPLICATION TO RECEIVE A TAXPAYER
                                     IDENTIFICATION NUMBER TO THE APPROPRIATE INTERNAL REVENUE SERVICE CENTER OR SOCIAL SECURITY
                                     ADMINISTRATION OFFICE OR (2) I INTEND TO DO SO IN THE NEAR FUTURE. I UNDERSTAND THAT IF I
                                     DO NOT PROVIDE A TAXPAYER IDENTIFICATION NUMBER BY THE TIME OF PAYMENT, 31% OF ALL PAYMENTS
                                     MADE TO ME WILL BE WITHHELD UNTIL I PROVIDE A NUMBER.
                                     SIGNATURE                                            DATE:                         , 1997
                                                -----------------------------------------       ------------------------
</TABLE>
 
                             THE INFORMATION AGENT:
 
                    CORPORATE INVESTOR COMMUNICATIONS, INC.
                               111 Commerce Road
                          Carlstadt, New Jersey 07072
                           (888) 881-0526 (toll free)
                             Banks and Brokers call
                                 (888) 349-2003
<PAGE>   33
 
                                                                       4.72% MPC
 
                        LETTER OF TRANSMITTAL AND PROXY
                                  TO ACCOMPANY
                     SHARES OF 4.72% SERIES PREFERRED STOCK
                             CUSIP NUMBER 605417401
                                       OF
 
                           MISSISSIPPI POWER COMPANY
              TENDERED PURSUANT TO THE OFFER TO PURCHASE FOR CASH
                                       BY
 
                              THE SOUTHERN COMPANY
                   DATED NOVEMBER 3, 1997, FOR PURCHASE AT A
                       PURCHASE PRICE OF $93.47 PER SHARE
 
                                     AND/OR
 
                     VOTED PURSUANT TO THE PROXY STATEMENT
                                       OF
 
                           MISSISSIPPI POWER COMPANY
 
       THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK
         CITY TIME, ON DECEMBER 10, 1997, UNLESS THE OFFER IS EXTENDED.
 
           THE PROXY CONTAINED IN THIS DOCUMENT IS IN RESPECT OF THE
        SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 10, 1997,
        OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR POSTPONED.
 
                      TO: THE BANK OF NEW YORK, DEPOSITARY
 
<TABLE>
<S>                                                 <C>
                     BY MAIL:                                 BY HAND OR OVERNIGHT COURIER:
           Tender & Exchange Department                        Tender & Exchange Department
                  P.O. Box 11248                                    101 Barclay Street
              Church Street Station                             Receive and Deliver Window
          New York, New York 10286-1248                          New York, New York 10286
</TABLE>
 
                NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)
(PLEASE FILL IN EXACTLY AS NAME(S) AND ADDRESS(ES) APPEAR(S) ON CERTIFICATE(S))
 
 
     IF YOU HAVE ANY QUESTIONS, HAVE NOT RECEIVED THE OFFER TO PURCHASE AND
PROXY STATEMENT OR OTHER DOCUMENTS PERTAINING TO THE OFFER, OR NEED ASSISTANCE
IN COMPLETING THIS LETTER OF TRANSMITTAL AND PROXY, PLEASE CONTACT CORPORATE
INVESTOR COMMUNICATIONS, INC., THE INFORMATION AGENT, AT TELEPHONE (888)
881-0526 (TOLL FREE).
<PAGE>   34
 
     PREFERRED SHAREHOLDERS (INCLUDING PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES
SUBSEQUENT TO THE RECORD DATE) WILL NOT BE ABLE TO VALIDLY TENDER THEIR SHARES
UNLESS THEY HAVE SUBMITTED A DULY COMPLETED, VALID AND UNREVOKED PROXY
INDICATING THEIR VOTE FOR THE PROPOSED AMENDMENT OR INDICATE IN THE ACCOMPANYING
PROXY THEIR INTENTION TO VOTE FOR THE PROPOSED AMENDMENT AT THE SPECIAL MEETING.
THE SOUTHERN COMPANY ("SOUTHERN") WILL NOT BE REQUIRED TO ACCEPT FOR PAYMENT OR
PAY FOR ANY SHARES TENDERED IF THE PROPOSED AMENDMENT IS NOT APPROVED AND
ADOPTED AT THE SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 10, 1997,
OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR POSTPONED (THE "SPECIAL
MEETING"). PREFERRED SHAREHOLDERS HAVE THE RIGHT TO VOTE FOR THE PROPOSED
AMENDMENT REGARDLESS OF WHETHER THEY TENDER THEIR SHARES BY CASTING THEIR VOTE
AND SIGNING THE PROXY CONTAINED WITHIN THIS LETTER OF TRANSMITTAL AND PROXY OR
BY VOTING IN PERSON AT THE SPECIAL MEETING. IF THE PROPOSED AMENDMENT IS
APPROVED AND ADOPTED, MISSISSIPPI POWER COMPANY (THE "COMPANY") WILL MAKE A
SPECIAL CASH PAYMENT TO EACH PREFERRED SHAREHOLDER WHO VOTED IN FAVOR OF THE
PROPOSED AMENDMENT, PROVIDED THAT SUCH HOLDER'S SHARES ARE NOT TENDERED PURSUANT
TO THE OFFER.
 
     HOLDERS WHO PURCHASE OR WHOSE PURCHASE SETTLES OR IS REGISTERED AFTER THE
CLOSE OF BUSINESS ON NOVEMBER 6, 1997 (THE "RECORD DATE") AND WHO WISH TO TENDER
IN THE OFFER MUST ARRANGE WITH THEIR SELLER TO RECEIVE A DULY COMPLETED, VALID
AND UNREVOKED PROXY (WHICH MAY BE IN THE FORM OF AN IRREVOCABLE ASSIGNMENT OF
PROXY AS SET FORTH IN THIS LETTER OF TRANSMITTAL AND PROXY) FROM THE HOLDER OF
RECORD OF SUCH SHARES ON THE RECORD DATE. IN ORDER TO FACILITATE RECEIPT OF
PROXIES, SHARES SHALL, DURING THE PERIOD WHICH COMMENCES NOVEMBER 4, 1997 (TWO
BUSINESS DAYS PRIOR TO THE RECORD DATE) AND WHICH WILL END AT THE CLOSE OF
BUSINESS ON THE EXPIRATION DATE (AS DEFINED IN THE OFFER TO PURCHASE AND PROXY
STATEMENT), TRADE IN THE OVER-THE-COUNTER MARKET WITH A PROXY PROVIDING THE
TRANSFEREE WITH THE RIGHT TO VOTE SUCH ACQUIRED SHARES IN THE PROXY
SOLICITATION.
 
     NOTE: SIGNATURES MUST BE PROVIDED HEREIN. PLEASE READ THE ACCOMPANYING
                            INSTRUCTIONS CAREFULLY.
 
     The undersigned hereby appoints Dwight H. Evans, Michael W. Southern and
Wayne Boston, or any of them, as proxies, each with the power to appoint his or
her substitute, and hereby authorizes them to represent and to vote as
designated hereunder and in their discretion with respect to any other business
properly brought before the Special Meeting all the shares of preferred stock of
the Company which the undersigned is entitled to vote at the Special Meeting or
any adjournment(s) or postponement(s) thereof.
 
     NOTE: IF YOU ARE VOTING BUT NOT TENDERING SHARES, DO NOT SEND ANY SHARE
CERTIFICATES WITH THIS LETTER OF TRANSMITTAL AND PROXY.
 
     THIS LETTER OF TRANSMITTAL AND PROXY IS SOLICITED ON BEHALF OF THE BOARD OF
DIRECTORS OF THE COMPANY. The proxy contained herein, when properly executed,
will be voted in the manner directed herein by the undersigned shareholder(s).
If no direction is made, the proxy will be voted FOR Item 1. An abstention is
the equivalent of a vote AGAINST the Proposed Amendment.
 
     PREFERRED SHAREHOLDERS WHO WISH TO TENDER THEIR SHARES MUST VOTE FOR ITEM
1.
 
     Indicate your vote by an (X). The Board of Directors recommends voting FOR
Item 1.
 
     HOLDERS OF SHARES WHO WISH TO TENDER THEIR SHARES MUST VOTE FOR THE
PROPOSED AMENDMENT EITHER BY SUBMITTING THIS PROXY OR BY VOTING AT THE SPECIAL
MEETING.
 
ITEM 1.
 
     To remove from the Company's Articles of Incorporation, as amended, (i)
Subparagraph F(b) of Paragraph FOURTH under "General Provisions" of the
"Preferred Stock" section, a provision restricting the amount of securities
representing unsecured indebtedness issuable by the Company, (ii) Subparagraph
(F)(a) of Paragraph FOURTH under "General Provisions" of the "Preferred Stock"
section, a provision which requires the vote of the holders of at least a
majority of the total voting power of the Company's outstanding preferred stock
to approve the sale of all or substantially all of the Company's property and
mergers or consolidations that have not been approved under the Public Utility
Holding Company Act of 1935, as amended, and (iii) Subparagraph (B) (except the
first paragraph therein) of Paragraph
 
                                        2
<PAGE>   35
 
FOURTH under "General Provisions" of the "Preferred Stock" section, a provision
restricting the ability of the Company to pay dividends on its common stock in
the event that its common equity capitalization falls below certain levels.
 
                  [ ] FOR       [ ] AGAINST       [ ] ABSTAIN
 
     SHARES REPRESENTED BY ALL PROPERLY EXECUTED PROXIES WILL BE VOTED IN
ACCORDANCE WITH INSTRUCTIONS APPEARING ON THIS PROXY. IN THE ABSENCE OF SPECIFIC
INSTRUCTIONS, PROXIES WILL BE VOTED IN ACCORDANCE WITH THE RECOMMENDATIONS OF
THE BOARD OF DIRECTORS, AND IN THE DISCRETION OF THE PROXY HOLDERS AS TO ANY
OTHER MATTERS THAT MAY PROPERLY COME BEFORE THE SPECIAL MEETING.
 
     Any holder of Shares held of record on the Record Date in the name of
another holder must establish to the satisfaction of the Company its entitlement
to exercise or transfer this Proxy. This will ordinarily require an assignment
by such record holders in blank or, if not in blank, to and from each successive
transferee, including the holder, with each signature guaranteed by an Eligible
Institution. A form of irrevocable assignment of proxy has been provided herein.
 
Please check box if you plan to attend the Special Meeting.  [ ]
 
                            SIGNATURE(S) OF OWNER(S)
 
X
  ------------------------------------------------------------------------------
 
X
  ------------------------------------------------------------------------------
Dated:                                                                    , 1997
       ------------------------------------------------------------------
Name(s):
        ------------------------------------------------------------------------
                                 (PLEASE PRINT)
Capacity (full title):
                      ----------------------------------------------------------
Address:
          ----------------------------------------------------------------------
                               (INCLUDE ZIP CODE)

DAYTIME Area Code and Telephone No.:
                                     -------------------------------------------
 
(Must be signed by the registered holder(s) exactly as name(s) appear(s) on the
stock certificates or on a security position listing or by person(s) authorized
to become registered holder(s) by certificates and documents transmitted
herewith. If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation or other person acting in a fiduciary
or representative capacity, please set forth full title and see Instruction 5.)

 
                                        3
<PAGE>   36
 
PLEASE COMPLETE:
 
 
PLEASE COMPLETE:
 
<TABLE>
<CAPTION>
                                             DESCRIPTION OF SHARES TENDERED
                 (IF TENDERING SHARES, PLEASE FILL IN EXACTLY AS INFORMATION APPEARS ON CERTIFICATE(S))
                                      (ATTACH ADDITIONAL SIGNED LIST IF NECESSARY)
                                                                                                   NUMBER OF SHARES NOT
                                                    TOTAL NUMBER OF SHARES                          TENDERED BUT AS TO
                                                        REPRESENTED BY        NUMBER OF SHARES     WHICH PROXIES GIVEN
              CERTIFICATE NUMBER(S)*                   CERTIFICATE(S)*           TENDERED**                ONLY
<S>                    <C>                 <C>                    <C>
</TABLE>
  * Need not be completed by shareholders tendering by book-entry transfer.
 ** Unless otherwise indicated, it will be assumed that all Shares represented 
    by any certificates delivered to the Depositary are being tendered. See 
    Instruction 4. You must vote for the Proposed Amendment with respect to 
    any Shares tendered.

 
      If any of your certificate(s) for Shares have been lost, stolen or
 destroyed, please call the Company's shareholder services department ("SCS
 Stockholder Services") collect at 404-506-0967. You may need to complete an
 Affidavit of Loss with respect to the lost certificate(s) (which will be
 provided by SCS Stockholder Services) and payment of an indemnity bond premium
 fee may be required.
 
PLEASE COMPLETE IF APPLICABLE:
                           GUARANTEE OF SIGNATURE(S)
                           (SEE INSTRUCTIONS 1 AND 5)
 
 Authorized Signature:
 
 Name:
       -----------------------------------------------------------------------
 
 Name of Firm:
               ---------------------------------------------------------------
 
 Address of Firm:
                  ------------------------------------------------------------
 
 -----------------------------------------------------------------------------

 Area Code and Telephone No.:
                              ------------------------------------------------
 
 Dated:                                                                 , 1997
       ----------------------------------------------------------------
 
                                        4
<PAGE>   37
 
     IF SELLING SHARES SUBSEQUENT TO NOVEMBER 3, 1997, A RECORD HOLDER MUST
                    COMPLETE THE FOLLOWING IRREVOCABLE PROXY
 
           PLEASE SIGN THIS TO IRREVOCABLY TRANSFER A PREFERRED STOCK
              PROXY TO A SUBSEQUENT HOLDER OF PREFERRED STOCK WHO
                 WAS NOT A HOLDER OF RECORD ON NOVEMBER 3, 1997
 
                               IRREVOCABLE PROXY
                         with respect to shares of the
                          4.72% Series Preferred Stock
                                       of
                           MISSISSIPPI POWER COMPANY
                  the undersigned hereby irrevocably appoints
 
                      ------------------------------------
                        Type or Print Name of Transferee
 
as attorney and proxy, with full power of substitution, to vote and otherwise
act for and in the name(s) of the undersigned with respect to the Shares
indicated below which were held of record by the undersigned on November 3,
1997, in the manner in which the undersigned would be entitled to vote and
otherwise act in respect of such Shares on any and all matters.
 
     This proxy shall be effective whether or not the Shares indicated below are
tendered in the Offer.
 
     This instrument supersedes and revokes any and all previous appointments of
proxies heretofore made by the undersigned with respect to the Shares indicated
below as to any and all matters. THIS PROXY IS IRREVOCABLE AND IS COUPLED WITH
AN INTEREST.
 
     All authority conferred or agreed to be conferred herein shall survive the
death or incapacity of the undersigned, and any obligation of the undersigned
hereunder shall be binding upon the heirs, executors, administrators, legal and
personal representatives, successors in interest and assigns of the undersigned.
The undersigned understands that tenders of Shares pursuant to any of the
procedures described in the Offer to Purchase and Proxy Statement and in this
Letter of Transmittal and Proxy will constitute a binding agreement between the
undersigned and the Company upon the terms and subject to the conditions of the
Offer.
 

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------
                                    DESCRIPTION OF PREFERRED STOCK
- -------------------------------------------------------------------------------------------------------
               CERTIFICATE NUMBER(S)                                 AGGREGATE NUMBER
            (ATTACH LIST IF NECESSARY)                                   OF SHARES
- -------------------------------------------------------------------------------------------------------
<S>                                                 <C> 
- -------------------------------------------------------------------------------------------------------
 
- -------------------------------------------------------------------------------------------------------
 
- -------------------------------------------------------------------------------------------------------
                                                    TOTAL:
- -------------------------------------------------------------------------------------------------------

- ------------------------------------------------       ------------------------------------------------
         Signature of Record Holder or                          Signature of Record Holder or
              Authorized Signatory                                   Authorized Signatory
 
- ------------------------------------------------       ------------------------------------------------
               Type or Print Name                                     Type or Print Name
 
Date:                                    ,  1997       Date:                                     , 1997
     ------------------------------------                   -------------------------------------
 
Tax Identification or Social Security No(s).
                                            -----------------------------------------------------------
</TABLE>
 
                                        5

 
<PAGE>   38
 
Must be signed by holder(s) exactly as name(s) appear(s) on the Record Date on
certificate(s) for the Shares or on a security position listing or by person(s)
authorized to become holder(s) by certificates and documents transmitted
herewith. If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation, agent or other person acting in a
fiduciary or representative capacity, please provide the following information
and see Instruction 5.
 
Name:
     ---------------------------------------------------------------------------
                                    (PLEASE PRINT)
 
Capacity:
         -----------------------------------------------------------------------
                                      (FULL TITLE)
 
Address:
         -----------------------------------------------------------------------
                                  (INCLUDE ZIP CODE)
 
Area Code and Tel. No.
                       ---------------------------------------------------------
 
PLEASE COMPLETE IF APPLICABLE:


                           GUARANTEE OF SIGNATURE(S)
                   (IF REQUIRED -- SEE INSTRUCTIONS 1 AND 5)
 Name of Firm:
               -----------------------------------------------------------------
 Authorized Signature:
                        --------------------------------------------------------
 Title:
         -----------------------------------------------------------------------
 Dated:                                                                   , 1997
         -----------------------------------------------------------------

     DELIVERY OF THIS LETTER OF TRANSMITTAL AND PROXY TO AN ADDRESS OTHER THAN
AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID DELIVERY. YOU MUST SIGN THIS
LETTER OF TRANSMITTAL AND PROXY IN THE APPROPRIATE SPACE THEREFOR PROVIDED AND,
IF YOU ARE TENDERING ANY SHARES OR VOTING IN FAVOR OF THE PROPOSED AMENDMENT,
COMPLETE THE SUBSTITUTE FORM W-9 SET FORTH BELOW OR A FORM W-8, AS APPLICABLE.
SEE INSTRUCTION 8 AND "IMPORTANT TAX INFORMATION" BELOW.
 
     DO NOT SEND ANY CERTIFICATES TO MERRILL LYNCH & CO., CORPORATE INVESTOR
COMMUNICATIONS, INC., THE SOUTHERN COMPANY, SCS STOCKHOLDER SERVICES OR
MISSISSIPPI POWER COMPANY.
 
     THE INSTRUCTIONS ACCOMPANYING THIS LETTER OF TRANSMITTAL AND PROXY SHOULD
BE READ CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL AND PROXY IS COMPLETED.
QUESTIONS REGARDING AND REQUESTS FOR COPIES OF THE OFFER TO PURCHASE AND PROXY
STATEMENT OR THIS LETTER OF TRANSMITTAL AND PROXY MAY BE DIRECTED TO CORPORATE
INVESTOR COMMUNICATIONS, INC., THE INFORMATION AGENT, AT (888) 881-0526 (TOLL
FREE) OR BANKS AND BROKERS CALL (888) 349-2003.
 
     This Letter of Transmittal and Proxy is to be used (a) if Shares are to be
voted but not tendered, or (b) if certificates for Shares are to be forwarded to
The Bank of New York ("Depositary") or (c) if delivery of tendered Shares (as
defined below) is to be made by book-entry transfer to the Depositary's account
at The Depository Trust Company ("DTC" or the "Book-Entry Transfer Facility")
pursuant to the procedures set forth under the heading "Terms of the
Offer -- Procedure for Tendering Shares" in the Offer to Purchase and Proxy
Statement (as defined below) and an Agent's Message (as defined below) is not
delivered.
 
     Preferred Shareholders who wish to tender Shares but who cannot deliver
their Shares and all other documents required hereby to the Depositary by the
Expiration Date must tender their Shares pursuant to the guaranteed delivery
procedure set forth under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase
 
                                        6
<PAGE>   39
 
and Proxy Statement. See Instruction 2. DELIVERY OF DOCUMENTS TO SOUTHERN, THE
COMPANY OR THE BOOK-ENTRY TRANSFER FACILITY DOES NOT CONSTITUTE A VALID
DELIVERY.
 
[ ]  CHECK HERE IF TENDERED SHARES ARE ENCLOSED HEREWITH.
 
     A Holder tendering Shares pursuant to this Letter of Transmittal and Proxy
     must check one of the following boxes:
 
     [ ] A duly completed, valid and unrevoked proxy indicating a vote FOR the
         Proposed Amendment is included herein.
 
     [ ] A vote FOR the Proposed Amendment will be cast at the Special Meeting.
 
ELIGIBLE INSTITUTIONS OR BROKERS TO COMPLETE ONLY IF APPLICABLE:

 
 [ ]  CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED BY BOOK-ENTRY
      TRANSFER TO THE DEPOSITARY'S ACCOUNT AT THE BOOK-ENTRY TRANSFER
      FACILITY AND COMPLETE THE FOLLOWING:
 
      Name of tendering institution
                                    -----------------------------------------
 
      Account No. at DTC
                         ----------------------------------------------------
 
      Transaction Code No.
                           --------------------------------------------------

 [ ]  CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE
      OF GUARANTEED DELIVERY AND PROXY PREVIOUSLY SENT TO THE DEPOSITARY AND
      COMPLETE THE FOLLOWING:
 
      Name(s) of tendering shareholder(s)
                                          -----------------------------------
 
      Date of execution of Notice of Guaranteed Delivery and Proxy
                                                                   ----------
 
     Name of institution that guaranteed delivery
                                                   --------------------------
 
     If delivery is by book-entry transfer:
 
      Name of tendering institution
                                    -----------------------------------------
 
      Account No. at DTC
                         ----------------------------------------------------
 
      Transaction Code No.
                           --------------------------------------------------

     A holder electing to tender Shares pursuant to a Notice of Guaranteed
     Delivery and Proxy must check one of the following boxes:
 
     [ ]  A duly completed, valid and unrevoked proxy indicating a vote FOR the
          Proposed Amendment was included with the Notice of Guaranteed Delivery
          and Proxy previously sent to the Depositary.
 
     [ ]  A duly completed, valid and unrevoked proxy indicating a vote FOR the
          Proposed Amendment is being delivered pursuant to a Notice of
          Guaranteed Delivery and Proxy previously sent to the Depositary.
 
     [ ]  A valid vote FOR the Proposed Amendment will be cast at the Special
          Meeting.
 
                    NOTE: SIGNATURES MUST BE PROVIDED ABOVE.
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY.
 
                                        7
<PAGE>   40
 
Ladies and Gentlemen:
 
     The abovesigned hereby tenders to The Southern Company, a Delaware
corporation ("Southern"), the shares in the amount set forth in the box above
designated "Description of Shares Tendered" pursuant to Southern's offer to
purchase any and all of the outstanding shares (the "Shares") of the series of
preferred stock of Mississippi Power Company, a Mississippi corporation, and
direct utility subsidiary of Southern (the "Company"), shown on the first page
hereof as to which this Letter of Transmittal and Proxy is applicable (the
"Shares") at the purchase price per Share shown on the first page hereof plus
from the Company a dividend attributable to the period ending on the Payment
Date (as defined in the Offer to Purchase and Proxy Statement), net to the
seller in cash, upon the terms and subject to the conditions set forth in the
Offer to Purchase and Proxy Statement, dated November 3, 1997 (the "Offer to
Purchase and Proxy Statement"), receipt of which is hereby acknowledged, and in
this Letter of Transmittal and Proxy (which as to the Shares, together with the
Offer to Purchase and Proxy Statement, constitutes the "Offer"). PREFERRED
SHAREHOLDERS WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT TO THE COMPANY'S ARTICLES OF INCORPORATION, AS
AMENDED, AS SET FORTH IN THE OFFER TO PURCHASE AND PROXY STATEMENT (THE
"PROPOSED AMENDMENT"). THE OFFER IS CONDITIONED UPON THE PROPOSED AMENDMENT
BEING APPROVED AND ADOPTED AT THE SPECIAL MEETING OF SHAREHOLDERS TO BE HELD ON
DECEMBER 10, 1997, OR ON SUCH DATE TO WHICH THE MEETING IS ADJOURNED OR
POSTPONED (THE "SPECIAL MEETING").  See "Proposed Amendment and Proxy
Solicitation," "Terms of the Offer -- Extension of Tender Period; Termination;
Amendments" and "Terms of the Offer -- Certain Conditions of the Offer" in the
Offer to Purchase and Proxy Statement.
 
     Subject to, and effective upon, acceptance for payment of and payment for
the Shares tendered herewith in accordance with the terms and subject to the
conditions of the Offer (including, if the Offer is extended or amended, the
terms and conditions of any such extension or amendment), the abovesigned hereby
sells, assigns and transfers to, or upon the order of, Southern all right, title
and interest in and to all the Shares that are being tendered hereby and hereby
constitutes and appoints The Bank of New York (the "Depositary") the true and
lawful agent and attorney-in-fact of the abovesigned with respect to such
Shares, with full power of substitution (such power of attorney being an
irrevocable power coupled with an interest), to (a) deliver certificates for
such Shares, or transfer ownership of such Shares on the account books
maintained by the Book-Entry Transfer Facility, together, in any such case, with
all accompanying evidences of transfer and authenticity, to or upon the order of
Southern, (b) present such Shares for registration and transfer on the books of
the Company and (c) receive all benefits and otherwise exercise all rights of
beneficial ownership of such Shares, all in accordance with the terms of the
Offer. The Depositary will act as agent for tendering shareholders for the
purpose of receiving payment from Southern and transmitting payment to tendering
shareholders.
 
     The abovesigned hereby represents and warrants that the abovesigned has
full power and authority to tender, sell, assign and transfer the Shares
tendered hereby and that, when and to the extent the same are accepted for
payment by Southern, Southern will acquire good, marketable and unencumbered
title thereto, free and clear of all liens, restrictions, charges, encumbrances,
conditional sales agreements or other obligations relating to the sale or
transfer thereof, and the same will not be subject to any adverse claims. The
abovesigned will, upon request, execute and deliver any additional documents
deemed by the Depositary or Southern to be necessary or desirable to complete
the sale, assignment and transfer of the Shares tendered hereby.
 
     All authority herein conferred or agreed to be conferred shall not be
affected by and shall survive the death, bankruptcy or incapacity of the
abovesigned, and any obligations of the abovesigned hereunder shall be binding
upon the heirs, legal representatives, successors, assigns, executors and
administrators of the abovesigned. Except as stated in the Offer, this tender is
irrevocable.
 
     The abovesigned understands that tenders of Shares pursuant to any one of
the procedures described under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase and Proxy Statement and in the
instructions hereto will constitute the abovesigned's acceptance of the terms
and conditions of the Offer, including the abovesigned's representation and
warranty that (a) the abovesigned has a net long position in the Shares being
tendered within the meaning of Rule 14e-4 promulgated under the Securities
Exchange Act of 1934, as amended, and (b) the tender of such Shares complies
with such Rule 14e-4. Southern's acceptance for payment of Shares tendered
pursuant to the Offer will constitute a binding agreement between the
abovesigned and Southern upon the terms and subject to the conditions of the
Offer.
 
     The abovesigned recognizes that, under certain circumstances set forth in
the Offer to Purchase and Proxy Statement, Southern may terminate or amend the
Offer or may not be required to purchase any of the Shares tendered hereby. In
either event, the abovesigned understands that certificate(s) for any Shares not
tendered or not purchased will be returned to the abovesigned.
 
                                        8
<PAGE>   41

     Unless otherwise indicated in the box below under the heading "Special
Payment Instructions," please issue the check for the purchase price of any
Shares purchased, and/or return any Shares not tendered or not purchased, in the
name(s) of the abovesigned (and, in the case of Shares tendered by book-entry
transfer, by credit to the account of the abovesigned at the Book-Entry Transfer
Facility). Similarly, unless otherwise indicated in the box below under the
heading "Special Delivery Instructions," please mail the check for the purchase
price of any Shares purchased and/or any certificates for Shares not tendered or
not purchased (and accompanying documents, as appropriate) to the abovesigned at
the address shown below the abovesigned's signature(s). In the event that both
"Special Payment Instructions" and "Special Delivery Instructions" are
completed, please issue the check for the purchase price of any Shares purchased
and/or return any Shares not tendered or not purchased in the name(s) of, and
mail said check and/or any certificates to, the person(s) so indicated. The
abovesigned recognizes that Southern has no obligation, pursuant to the "Special
Payment Instructions," to transfer any Shares from the name of the registered
holder(s) thereof if Southern does not accept for payment any of the Shares so
tendered.
 
COMPLETE ONLY IF APPLICABLE:
 
                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 4, 6 AND 7)
 
  To be completed ONLY if the check for the purchase price of Shares purchased,
the certificates for Shares not tendered or not purchased or the check for the
Special Cash Payment are to be issued in the name of someone other than the
abovesigned.
 
Issue  [ ] Check and/or  [ ] Certificate(s) to:
 
Name
       -------------------------------------------------------------------------
                         (PLEASE PRINT)
Address
       -------------------------------------------------------------------------

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

- --------------------------------------------------------------------------------
                       (INCLUDE ZIP CODE)

- --------------------------------------------------------------------------------
         (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NUMBER)
 
                     SPECIAL DELIVERY INSTRUCTIONS
                   (SEE INSTRUCTIONS 4, 6 AND 7)
 
  To be completed ONLY if the check for the purchase price of Shares purchased,
the certificates for Shares not tendered or not purchased or the check for the
Special Cash Payment are to be mailed to someone other than the abovesigned or
to the abovesigned at an address other than that shown below the abovesigned's
signature(s).
 
Mail  [ ] Check and/or  [ ] Certificate(s) to:

Name
       -------------------------------------------------------------------------
                         (PLEASE PRINT)
Address
       -------------------------------------------------------------------------

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

- --------------------------------------------------------------------------------
                       (INCLUDE ZIP CODE)
 
COMPLETE ONLY IF YOUR SHARES ARE LOST:
 
                             LOST CERTIFICATES BOX
 
   [ ] CHECK HERE IF ANY OF THE CERTIFICATES REPRESENTING SHARES THAT YOU OWN
       AND WISH TO TENDER HAVE BEEN LOST, DESTROYED OR STOLEN. (SEE
       INSTRUCTION 12.)
 
       Number of Shares represented by lost, destroyed or stolen certificates:
       
       -------------
    
                                        9
<PAGE>   42
 
COMPLETE ONLY IF APPLICABLE:
                         SOLICITED TENDERS AND PROXIES
                              (SEE INSTRUCTION 10)
        As provided in Instruction 10, Southern will pay a solicitation fee
   of an amount equal to 1.50% of par value per Share for any Shares
   tendered, accepted for payment and paid for pursuant to the Offer (except
   that for transactions for beneficial owners whose ownership equals or
   exceeds 2,500 Shares, Southern will pay a solicitation fee of an amount
   equal to 1.00% of the par value per Share). If the Proposed Amendment is
   approved and adopted, the Company agrees to pay a separate fee of an
   amount equal to 0.50% of the par value per Share for Shares that are not
   tendered pursuant to the Offer but which are voted in favor of the
   Proposed Amendment (except that with respect to transactions for
   beneficial owners whose ownership equals or exceeds 2,500 Shares, the
   Company will pay a separate fee of an amount equal to 0.25% of the par
   value of such Shares). With respect to fees payable pursuant to this
   paragraph involving transactions for beneficial owners whose ownership is
   less than 2,500 Shares, any fees payable hereunder shall be paid in full
   to the Dealer Manager unless a Soliciting Dealer is designated (as herein
   described), in which case such fee shall be payable in full to such
   designated Soliciting Dealer (which designated Soliciting Dealer may be
   the Dealer Manager). With respect to fees payable pursuant to this
   paragraph involving transactions for beneficial owners whose ownership
   equals or exceeds 2,500 Shares, any fees payable hereunder shall be paid
   in full to the Dealer Manager unless a Soliciting Dealer is designated, in
   which case 80% of such fee shall be paid to the Dealer Manager and 20% of
   such fee shall be paid to the designated Soliciting Dealer (which
   designated Soliciting Dealer may be the Dealer Manager). However,
   Soliciting Dealers will not be entitled to a solicitation fee for Shares
   beneficially owned by such Soliciting Dealer.
 
        The undersigned represents that the Soliciting Dealer which solicited
   and obtained this tender or proxy is:
 
   Name of Firm:
                 ------------------------------------------------------------
                                 (PLEASE PRINT)
 
   Name of Individual Broker
   or Financial Consultant:
                            -------------------------------------------------
 
   Telephone Number of Broker
   or Financial Consultant:  
                            -------------------------------------------------
 
   Identification Number (if known):
                                     ----------------------------------------
 
   Address:
            -----------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
COMPLETE ONLY IF CUSTOMER'S SHARES HELD IN NOMINEE NAME ARE TENDERED:
 
  NAME OF BENEFICIAL OWNER                      NUMBER OF SHARES TENDERED
                     (ATTACH ADDITIONAL LIST IF NECESSARY)

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

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

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

 
     The acceptance of compensation by such Soliciting Dealer will constitute a
representation by it that (a) it has complied with the applicable requirements
of the Securities Exchange Act of 1934, as amended, and the applicable rules and
regulations thereunder, in connection with such solicitation; (b) it is entitled
to such compensation for such solicitation under the terms and conditions of the
Offer to Purchase and Proxy Statement; (c) in soliciting tenders of Shares, it
has used no solicitation materials other than those furnished by Southern; and
(d) if it is a foreign broker or dealer not eligible for membership in the
National Association of Securities Dealers, Inc. (the "NASD"), it has agreed to
conform to the NASD's Rules of Fair Practice in making solicitations.
 
     The payment of compensation to any Soliciting Dealer is dependent on such
Soliciting Dealer returning a Notice of Solicited Tenders and Proxies to the
Depositary.
 
     THIS LETTER OF TRANSMITTAL AND PROXY IS TO BE USED FOR THE TENDER OF SHARES
OF THE 4.72% SERIES (AS DEFINED IN THE OFFER TO PURCHASE AND PROXY STATEMENT)
ONLY. ANY PERSON DESIRING TO TENDER OR VOTE SHARES OF ANY OTHER SERIES OF
 
                                       10

<PAGE>   43
 
PREFERRED STOCK FOR WHICH SOUTHERN IS MAKING A TENDER OFFER AND/OR SOLICITING A
PROXY MUST SUBMIT A LETTER OF TRANSMITTAL AND PROXY RELATING TO THAT SPECIFIC
SERIES.
 
    PLEASE COMPLETE SUBSTITUTE FORM W-9 BELOW OR A FORM W-8, AS APPLICABLE.
 
SIGN HERE:
          ---------------------------------------------
                      SIGNATURE OF OWNER(S)
 
          ---------------------------------------------
                      SIGNATURE OF OWNER(S)

                                  INSTRUCTIONS
 
             FORMING PART OF THE TERMS AND CONDITIONS OF THE OFFER
 
     1. GUARANTEE OF SIGNATURES.  Except as otherwise provided below, all
signatures on this Letter of Transmittal and Proxy must be guaranteed by a firm
that is a member of a registered national securities exchange or the NASD, or by
a commercial bank or trust company having an office or correspondent in the
United States which is a participant in an approved Medallion Signature
Guarantee Program (each of the foregoing being referred to as an "Eligible
Institution"). Signatures on this Letter of Transmittal and Proxy need not be
guaranteed (a) if this Letter of Transmittal and Proxy is signed by the
registered holder(s) of the Shares (which term, for purposes of this document,
shall include any participant in the Book-Entry Transfer Facility whose name
appears on a security position listing as the owner of Shares) tendered herewith
and such holder(s) has not completed the box above under the heading "Special
Payment Instructions" or the box above under the heading "Special Delivery
Instructions" on this Letter of Transmittal and Proxy, (b) if such Shares are
tendered for the account of an Eligible Institution or (c) if this Letter of
Transmittal and Proxy is being used solely for the purpose of voting Shares
which are not being tendered pursuant to the Offer. See Instruction 5.
 
     2. DELIVERY OF LETTER OF TRANSMITTAL AND PROXY AND SHARES.  This Letter of
Transmittal and Proxy is to be used if (a) certificates are to be forwarded
herewith, (b) delivery of Shares to be made by book-entry transfer pursuant to
the procedures set forth under the heading "Terms of the Offer -- Procedure for
Tendering Shares" in the Offer to Purchase and Proxy Statement and an Agent's
Message (as defined below) is not delivered or (c) Shares are being voted in
connection with the Offer. Certificates for all physically delivered Shares, or
a confirmation of a book-entry transfer into the Depositary's account at the
Book-Entry Transfer Facility of all Shares delivered electronically, as well as
a properly completed and duly executed Letter of Transmittal and Proxy, and any
other documents required by this Letter of Transmittal and Proxy, must be
received by the Depositary at one of its addresses set forth on the front page
of this Letter of Transmittal and Proxy on or prior to the Expiration Date (as
defined in the Offer to Purchase and Proxy Statement) with respect to all
Shares. Preferred Shareholders who wish to tender their Shares yet who cannot
deliver their Shares and all other required documents to the Depositary on or
prior to the Expiration Date must tender their Shares pursuant to the guaranteed
delivery procedure set forth under the heading "Terms of the Offer -- Procedure
for Tendering Shares" in the Offer to Purchase and Proxy Statement. Pursuant to
such procedure: (a) such tender must be made by or through an Eligible
Institution, (b) a properly completed and duly executed Notice of Guaranteed
Delivery and Proxy in the form provided by Southern (with any required signature
guarantees) must be received by the Depositary on or prior to the Expiration
Date and (c) the certificates for all physically delivered Shares, or a
confirmation of a book-entry transfer into the Depositary's account at the
Book-Entry Transfer Facility of all Shares delivered electronically, together
with a properly completed and duly executed Letter of Transmittal and Proxy, and
any other documents required by this Letter of Transmittal and Proxy must be
received by the Depositary by 5:00 p.m. (New York City time) within three New
York Stock Exchange trading days after the date of execution of such Notice of
Guaranteed Delivery and Proxy, all as provided under the heading "Terms of the
Offer -- Procedure for Tendering Shares" in the Offer to Purchase and Proxy
Statement. Tenders by book-entry transfer may also be made by delivering an
Agent's Message in lieu of this Letter of Transmittal and Proxy. The term
"Agent's Message" means a message, transmitted by the Book-Entry Transfer
Facility, received by the Depositary and forming a part of the book-entry
transfer when a tender is initiated, which states that the Book-Entry Transfer
Facility has received an express acknowledgment from a participant tendering
Shares that such participant has received and agrees to be bound by the terms of
this Letter of Transmittal and Proxy and that Southern may enforce such
agreement against such participant.
 
     THE METHOD OF DELIVERY OF SHARES AND ALL OTHER REQUIRED DOCUMENTS IS AT THE
OPTION AND RISK OF THE TENDERING PREFERRED SHAREHOLDER. IF CERTIFICATES FOR
SHARES ARE SENT BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY
INSURED, IS RECOMMENDED.
 
                                       11
<PAGE>   44
 
     No alternative, conditional or contingent tenders will be accepted. See
"Terms of the Offer -- Number of Shares; Purchase Prices; Expiration Date;
Dividends" in the Offer to Purchase and Proxy Statement. By executing this
Letter of Transmittal and Proxy, the tendering shareholder waives any right to
receive any notice of the acceptance for payment of the Shares.
 
     3. VOTING.  PREFERRED SHAREHOLDERS (INCLUDING PREFERRED SHAREHOLDERS WHO
ACQUIRE SHARES SUBSEQUENT TO THE RECORD DATE) WHO WISH TO TENDER THEIR SHARES
PURSUANT TO THE OFFER MUST VOTE IN FAVOR OF THE PROPOSED AMENDMENT. THE OFFER IS
CONDITIONED UPON THE PROPOSED AMENDMENT BEING APPROVED AND ADOPTED AT THE
SPECIAL MEETING.  In addition, Preferred Shareholders have the right to vote for
the Proposed Amendment regardless of whether they tender their Shares by casting
their vote and duly executing this Letter of Transmittal and Proxy or by voting
in person at the Special Meeting. By executing a Notice of Guaranteed Delivery
and Proxy, a Preferred Shareholder is deemed to have tendered the Shares
described in such Notice of Guaranteed Delivery and Proxy and to have voted such
Shares in accordance with the proxy contained therein. If no vote is indicated
on an otherwise properly executed proxy contained within this Letter of
Transmittal and Proxy (or within a Notice of Guaranteed Delivery and Proxy),
then all Shares in respect of such proxy will be voted in favor of the Proposed
Amendment. See "Proposed Amendment and Proxy Solicitation" in the Offer to
Purchase and Proxy Statement. The Offer is being sent to all persons in whose
names Shares are registered on the books of the Company on the Record Date and
transferees thereof. Preferred Shareholders who purchase or whose purchase is
registered after the Record Date and who wish to tender in the Offer must
arrange with their seller to receive a proxy from the holder of record of such
Shares on the Record Date. Any holder of Shares held of record on the Record
Date in the name of another must establish to the satisfaction of the Company
his entitlement to exercise or transfer such Proxy. This will ordinarily require
an assignment by such record holder in blank or, if not in blank, to and from
each successive transferee, including the holder, with each signature guaranteed
by an Eligible Institution. See Instruction 5. In order to facilitate receipt of
proxies, Shares shall, during the period which commences on November 4, 1997
(two business days prior to the Record Date) and which will end at the close of
business on the Expiration Date, trade in the over-the-counter market with a
proxy providing the transferee with the right to vote such acquired Shares in
the Proxy Solicitation. No record date is fixed for determining which persons
are permitted to tender Shares. However, only the holders of record, or holders
who acquire an assignment of proxy from such holders, are permitted to vote for
the Proposed Amendment and thereby validly tender Shares pursuant to the Offer.
Any person who is the beneficial owner but not the record holder of Shares must
arrange for the record transfer of such Shares prior to tendering or direct the
record holder to tender on behalf of the beneficial owner.
 
     4. PARTIAL TENDERS (NOT APPLICABLE TO SHAREHOLDERS WHO TENDER BY BOOK-ENTRY
TRANSFER).  If fewer than all the Shares represented by any certificate
delivered to the Depositary are to be tendered, fill in the number of Shares
that are to be tendered in the box above under the heading "Description of
Shares Tendered." In such case, a new certificate for the remainder of the
Shares represented by the old certificate will be sent to the person(s) signing
this Letter of Transmittal and Proxy, unless otherwise provided in the box above
under the heading "Special Payment Instructions" or "Special Delivery
Instructions," as promptly as practicable following the expiration or
termination of the Offer. All Shares represented by certificates delivered to
the Depositary will be deemed to have been tendered unless otherwise indicated.
 
     5. SIGNATURES ON THIS LETTER OF TRANSMITTAL AND PROXY AND/OR NOTICE OF
GUARANTEED DELIVERY AND PROXY; STOCK POWERS AND ENDORSEMENTS.  If either this
Letter of Transmittal and Proxy or the Notice of Guaranteed Delivery and Proxy
(together, the "Tender and Proxy Documents") is signed by the registered
holder(s) of the Shares tendered hereby, the signature(s) must correspond with
the name(s) as written on the face of the certificates without alteration,
enlargement or any change whatsoever.
 
     If any of the Shares tendered or voted under either Tender and Proxy
Document are held of record by two or more persons, all such persons must sign
such Tender and Proxy Document.
 
     If any of the Shares tendered or voted under either Tender and Proxy
Document are registered in different names or different certificates, it will be
necessary to complete, sign and submit as many separate applicable Tender and
Proxy Documents as there are different registrations or certificates.
 
     If either Tender and Proxy Document is signed by the registered holder(s)
of the Shares tendered hereby, no endorsements of certificates or separate stock
powers are required unless payment of the purchase price is to be made to, or
Shares not tendered or not purchased are to be registered in the name of, any
person other than the registered holder(s). Signatures on any such certificates
or stock powers must be guaranteed by an Eligible Institution. See Instruction
1.
 
                                       12
<PAGE>   45
 
     If this Letter of Transmittal and Proxy is signed by a person other than
the registered holder(s) of the Shares tendered hereby, certificates must be
endorsed or accompanied by appropriate stock powers, in either case, signed
exactly as the name(s) of the registered holder(s) appear(s) on the certificates
for such Shares. Signature(s) on any such certificates or stock powers must be
guaranteed by an Eligible Institution. See Instruction 1.
 
     If either Tender and Proxy Document or any certificate or stock power is
signed by a trustee, executor, administrator, guardian, attorney-in-fact,
officer of a corporation or other person acting in a fiduciary or representative
capacity, such person should so indicate when signing, and proper evidence
satisfactory to Southern of the authority of such person so to act must be
submitted.
 
     6. STOCK TRANSFER TAXES.  Except as set forth in this Instruction 6,
Southern will pay or cause to be paid any stock transfer taxes with respect to
the sale and transfer of any Shares to it or its order pursuant to the Offer.
If, however, payment of the purchase price is to be made to, or Shares not
tendered or not purchased are to be registered in the name of, any person other
than the registered holder(s), or if tendered Shares are registered in the name
of any person other than the person(s) signing this Letter of Transmittal and
Proxy, the amount of any stock transfer taxes (whether imposed on the registered
holder(s), such other person or otherwise) payable on account of the transfer to
such person will be deducted from the purchase price unless satisfactory
evidence of the payment of such taxes, or exemption therefrom, is submitted. See
"Terms of the Offer -- Acceptance of Shares for Payment and Payment of Purchase
Price and Dividends" in the Offer to Purchase and Proxy Statement. EXCEPT AS
PROVIDED IN THIS INSTRUCTION 6, IT WILL NOT BE NECESSARY TO AFFIX TRANSFER TAX
STAMPS TO THE CERTIFICATES REPRESENTING SHARES TENDERED HEREBY.
 
     7. SPECIAL PAYMENT AND DELIVERY INSTRUCTIONS.  If the check for the
purchase price of any Shares purchased is to be issued in the name of, any
Shares not tendered or not purchased are to be returned to or the check for the
Special Cash Payment is to be issued in the name of, a person other than the
person(s) signing this Letter of Transmittal and Proxy or if the check and/or
any certificate for Shares not tendered or not purchased are to be mailed to
someone other than the person(s) signing this Letter of Transmittal and Proxy or
to an address other than that shown in the box above under the heading "Name(s)
and Address(es) of Registered Holder(s)," then the "Special Payment
Instructions" and/or "Special Delivery Instructions" on this Letter of
Transmittal and Proxy should be completed. Preferred Shareholders tendering
Shares by book-entry transfer will have any Shares not accepted for payment
returned by crediting the account maintained by such Preferred Shareholder at
the Book-Entry Transfer Facility.
 
     8. SUBSTITUTE FORM W-9 AND FORM W-8.  A tendering Preferred Shareholder and
a Preferred Shareholder voting in favor of the Proposed Amendment (but not
tendering) is required to provide the Depositary with (i) in the case of a
United States Preferred Shareholder, a correct Taxpayer Identification Number
("TIN") and a certification that the IRS has not notified such shareholder that
he is subject to backup withholding on Substitute Form W-9, or (ii) in the case
of a foreign Preferred Shareholder, a properly completed Form W-8, as discussed
below under "Important Tax Information." Failure to provide the information on
either Substitute Form W-9 or Form W-8 may subject the Preferred Shareholder to
a $50 penalty imposed by the Internal Revenue Service and to 31% Federal income
tax backup withholding on the gross amount payable. The box in Part 2 of
Substitute Form W-9 may be checked if the Preferred Shareholder has not been
issued a TIN and has applied for a number or intends to apply for a number in
the near future. If the box in Part 2 is checked and the Depositary is not
provided with a TIN by the time of payment, the Depositary will withhold 31% of
the gross amount otherwise payable until a TIN is provided to the Depositary.
 
     9. REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.  Any questions or requests
for assistance may be directed to the Information Agent or the Dealer Manager at
their respective telephone numbers and addresses listed below. Requests for
additional copies of the Offer to Purchase and Proxy Statement, this Letter of
Transmittal and Proxy or other tender offer materials may be directed to the
Information Agent or the Dealer Manager and such copies will be furnished
promptly at Southern's expense. Preferred Shareholders may also contact their
local broker, dealer, commercial bank or trust company for assistance concerning
the Offer.
 
     10. SOLICITED TENDERS AND PROXIES.  Southern will pay a solicitation fee of
an amount equal to 1.50% of the par value per Share for Shares that are
tendered, accepted for payment and paid for pursuant to the Offer (except that
for transactions for beneficial owners whose ownership equals or exceeds 2,500
Shares, Southern will pay a solicitation fee of an amount equal to 1.00% of the
par value per Share). If the Proposed Amendment is approved and adopted, the
Company agrees to pay a separate fee of an amount equal to 0.50% of the par
value per Share for Shares that are not tendered pursuant to the Offer but which
are voted in favor of the Proposed Amendment (except that with respect to
transactions for beneficial owners whose ownership equals or exceeds 2,500
Shares, the Company will pay a separate fee of an amount equal to 0.25% of the
par value of such Shares). With respect to fees payable pursuant to this
paragraph involving transactions for beneficial owners whose ownership is less
than 2,500 Shares, any fees payable hereunder shall be paid in full to the
Dealer Manager unless a Soliciting Dealer is designated (as herein described),
in which case such fee
 
                                       13
<PAGE>   46
 
shall be payable in full to such designated Soliciting Dealer (which designated
Soliciting Dealer may be the Dealer Manager). With respect to fees payable
pursuant to this paragraph involving transactions for beneficial owners whose
ownership equals or exceeds 2,500 Shares, any fees payable hereunder shall be
paid in full to the Dealer Manager unless a Soliciting Dealer is designated, in
which case 80% of such fee shall be paid to the Dealer Manager and 20% of such
fee shall be paid to the designated Soliciting Dealer (which designated
Soliciting Dealer may be the Dealer Manager). A designated Soliciting Dealer
shall be named hereunder under the heading "Solicited Tenders and Proxies," and
shall have solicited and obtained the tender or proxy, and shall also be (a) any
broker or dealer in securities, including the Dealer Manager in its capacity as
a dealer or broker, which is a member of any national securities exchange or of
the NASD, (b) any foreign broker or dealer not eligible for membership in the
NASD which agrees to conform to the NASD's Rules of Fair Practice in soliciting
tenders outside the United States to the same extent as though it were an NASD
member, or (c) any bank or trust company (each of which is referred to herein as
a "Soliciting Dealer"). No such fee shall be payable to a Soliciting Dealer with
respect to the tender of Shares by a holder unless the Letter of Transmittal and
Proxy accompanying such tender designates such Soliciting Dealer. No such fee
shall be payable to a Soliciting Dealer in respect of Shares registered in the
name of such Soliciting Dealer unless such Shares are held by such Soliciting
Dealer as nominee and such Shares are being tendered for the benefit of one or
more beneficial owners identified on the Letter of Transmittal and Proxy or on
the Notice of Solicited Tenders and Proxies (included in the materials provided
to brokers and dealers). No such fee shall be payable to a Soliciting Dealer
with respect to the tender of Shares by the holder of record, for the benefit of
the beneficial owner, unless the beneficial owner has designated such Soliciting
Dealer. If tendered Shares are being delivered by book-entry transfer, the
Soliciting Dealer must return a Notice of Solicited Tenders and Proxies to the
Depositary within three business days after expiration of the Offer to receive a
solicitation fee. No such fee shall be payable to a Soliciting Dealer if such
Soliciting Dealer is required for any reason to transfer the amount of such fee
to a depositing holder (other than itself). No such fee shall be paid to a
Soliciting Dealer with respect to Shares tendered for such Soliciting Dealer's
own account. No broker, dealer, bank, trust company or fiduciary shall be deemed
to be the agent of Southern, the Company, the Depositary, the Information Agent
or the Dealer Manager for purposes of the Offer.
 
     Soliciting Dealers will include any organizations described in clauses (a),
(b) or (c) above even when the activities of such organization in connection
with the Offer consist solely of forwarding to clients materials relating to the
Offer, including this Letter of Transmittal and Proxy, and tendering Shares as
directed by beneficial owners thereof. No Soliciting Dealer is required to make
any recommendation to holders of Shares as to whether to tender or refrain from
tendering in the Offer. No assumption is made, in making payment to any
Soliciting Dealer, that its activities in connection with the Offer included any
activities other than those described above, and for all purposes noted in all
materials relating to the Offer, the term "solicit" shall be deemed to mean no
more than "processing shares tendered," "processing shares voted" or "forwarding
to customers materials regarding the Offer."
 
     11. IRREGULARITIES.  All questions as to the form of documents and the
validity, eligibility (including time of receipt) and acceptance of any tender
of Shares will be determined by Southern, in its sole discretion, and its
determination shall be final and binding. Southern reserves the absolute right
to reject any and all tenders of Shares that it determines are not in proper
form or the acceptance for payment of or payment for Shares that may, in the
opinion of Southern's counsel, be unlawful. Southern also reserves the absolute
right to waive any of the conditions to the Offer or any defect or irregularity
in any tender of Shares and Southern's interpretation of the terms and
conditions of the Offer (including these instructions) shall be final and
binding. Unless waived, any defects or irregularities in connection with tenders
must be cured within such time as Southern shall determine. None of Southern,
the Company, the Dealer Manager, the Depositary, the Information Agent or any
other person shall be under any duty to give notice of any defect or
irregularity in tenders, nor shall any of them incur any liability for failure
to give any such notice. Tenders will not be deemed to have been made until all
defects and irregularities have been cured or waived.
 
     12. LOST, DESTROYED OR STOLEN CERTIFICATES.  If any of your certificate(s)
for Shares have been lost, stolen or destroyed, please call SCS Stockholder
Services collect at 404-506-0967. You may need to complete an Affidavit of Loss
with respect to the lost certificate(s) (which will be provided by SCS
Stockholder Services) and payment of an indemnity bond premium fee may be
required. The tender of Shares pursuant to this Letter of Transmittal and Proxy
will not be valid unless prior to the Expiration Date: (a) such procedures have
been completed and a replacement certificate for the Shares has been delivered
to the Depositary or (b) a Notice of Guaranteed Delivery and Proxy has been
delivered to the Depositary. See Instruction 2.
 
     IMPORTANT:  THIS LETTER OF TRANSMITTAL AND PROXY, DULY EXECUTED, TOGETHER
WITH, IF APPLICABLE, CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY TRANSFER, AND
ALL OTHER REQUIRED DOCUMENTS MUST BE RECEIVED BY THE DEPOSITARY, OR, IF
APPLICABLE, THE NOTICE OF GUARANTEED DELIVERY AND PROXY MUST BE RECEIVED BY THE
DEPOSITARY, ON OR PRIOR TO THE EXPIRATION DATE.
 
                                       14
<PAGE>   47
 
                           IMPORTANT TAX INFORMATION
 
     Under United States Federal income tax law, a Preferred Shareholder whose
tendered Shares are accepted for payment or who will receive a Special Cash
Payment as a result of voting in favor of the Proposed Amendment is required to
provide the Depositary (as payer) with either such Preferred Shareholder's
correct TIN and a certification that the IRS has not notified such shareholder
that he is subject to backup withholding on Substitute Form W-9 below or a
properly completed Form W-8. If such Preferred Shareholder is an individual, the
TIN is his or her social security number. For a business or other entity, the
TIN is its federal employer identification number. If the Depositary is not
provided with the correct TIN or properly completed Form W-8, the Preferred
Shareholder may be subject to a $50 penalty imposed by the Internal Revenue
Code. In addition, payments that are made to such Preferred Shareholder with
respect to Shares purchased pursuant to the Offer may be subject to 31% backup
withholding.
 
     Certain Preferred Shareholders (including, among others, all corporations
and certain foreign individuals) are exempt from backup withholding. For a
corporate United States Preferred Shareholder to qualify for such exemption,
such Preferred Shareholder must provide the Depositary with a properly completed
and executed Substitute Form W-9 attesting to its exempt status. In order for a
foreign Preferred Shareholder to qualify as an exempt recipient, such Preferred
Shareholder must submit to the Depositary a properly completed Internal Revenue
Service Form W-8, signed under penalties of perjury, attesting to that Preferred
Shareholder's exempt status. A Form W-8 can be obtained from the Depositary. See
the enclosed Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9 for additional instructions.
 
     If Federal income tax backup withholding applies, the Depositary is
required to withhold 31% of any payments made to the Preferred Shareholder.
Backup withholding is not an additional tax. Rather, the Federal income tax
liability of persons subject to backup withholding will be reduced by the amount
of the tax withheld. If withholding results in an overpayment of taxes, a refund
may be obtained from the Internal Revenue Service.
 
PURPOSE OF SUBSTITUTE FORM W-9 AND FORM W-8
 
     To avoid backup withholding on a Special Cash Payment or payments that are
made to a Preferred Shareholder with respect to Shares purchased pursuant to the
Offer, the Preferred Shareholder is required to notify the Depositary of his or
her correct TIN by completing the Substitute Form W-9 attached hereto certifying
that the TIN provided on Substitute Form W-9 is correct and that (a) the
Preferred Shareholder has not been notified by the Internal Revenue Service that
he or she is subject to Federal income tax backup withholding as a result of
failure to report all interest or dividends or (b) the Internal Revenue Service
has notified the Preferred Shareholder that he or she is no longer subject to
Federal income tax backup withholding. Foreign Preferred Shareholders must
submit a properly completed Form W-8 in order to avoid the applicable backup
withholding; provided, however, that backup withholding will not apply to
foreign Preferred Shareholders subject to withholding under other provisions of
the Code on the Special Cash Payment or on gross payments received pursuant to
the Offer. Foreign Preferred Shareholders that submit a properly completed Form
W-8 may nevertheless be subject to withholding under other provisions of the
Code on the payments received by them.
 
                                       15
<PAGE>   48
 
WHAT NUMBER TO GIVE THE DEPOSITARY
 
     The Preferred Shareholder is required to give the Depositary the TIN of the
registered owner of the Shares. If the Shares are in more than one name or are
not in the name of the actual owner, consult the enclosed Guidelines for
Certification of Taxpayer Identification Number on Substitute Form W-9 for
additional guidance on which number to report.
 
                       PAYER'S NAME: THE BANK OF NEW YORK
 

<TABLE>
<S>                                <C>                                                           <C>

                                     PART 1--PLEASE PROVIDE YOUR TIN IN THE BOX AT RIGHT AND      ----------------------------
  SUBSTITUTE                         CERTIFY BY SIGNING AND DATING BELOW.                            SOCIAL SECURITY NUMBER
   FORM W-9
                                                                                                               OR
                                                                                                  ----------------------------
                                                                                                   EMPLOYER IDENTIFICATION TIN
                                     --------------------------------------------------------------------------------------------   
                                     NAME (PLEASE PRINT)                                                    PART 2 --
                                                        --------------------------------------
                                     ADDRESS                                                            AWAITING TIN [ ]
                                             -------------------------------------------------
                                     CITY                                     STATE
                                          ------------------------------------      ----------
                                     ZIP CODE
                                              -------------------------
                                     --------------------------------------------------------------------------------------------   
  DEPARTMENT OF THE TREASURY         PART 3 -- CERTIFICATION -- UNDER PENALTIES OF PERJURY, I CERTIFY THAT:
  INTERNAL REVENUE SERVICE           
                                     (1) THE NUMBER SHOWN ON THIS FORM IS MY CORRECT TAXPAYER IDENTIFICATION NUMBER (OR A TIN
                                     HAS NOT BEEN ISSUED TO ME BUT I HAVE MAILED OR DELIVERED AN APPLICATION TO RECEIVE A TIN OR
                                     INTEND TO DO SO IN THE NEAR FUTURE), (2) I AM NOT SUBJECT TO BACKUP WITHHOLDING EITHER
                                     BECAUSE I HAVE NOT BEEN NOTIFIED BY THE INTERNAL REVENUE SERVICE (THE "IRS") THAT I AM
                                     SUBJECT TO BACKUP WITHHOLDING AS A RESULT OF A FAILURE TO REPORT ALL INTEREST OR DIVIDENDS
                                     OR THE IRS HAS NOTIFIED ME THAT I AM NO LONGER SUBJECT TO BACKUP WITHHOLDING AND (3) ALL
                                     OTHER INFORMATION PROVIDED ON THIS FORM IS TRUE, CORRECT AND COMPLETE.
                                     SIGNATURE 
                                                ---------------------------------------------------------------------------------
                                     DATE                        , 1997
                                           ---------------------

                                     YOU MUST CROSS OUT ITEM (2) ABOVE IF YOU HAVE BEEN NOTIFIED BY THE IRS THAT YOU ARE
                                     CURRENTLY SUBJECT TO BACKUP WITHHOLDING BECAUSE OF UNDERREPORTING INTEREST OR DIVIDENDS ON
                                     YOUR TAX RETURN.
                                     --------------------------------------------------------------------------------------------   
                                     NOTE: FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP WITHHOLDING OF 31% OF
  PAYER'S REQUEST FOR                ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER OR PROXY SOLICITATION. PLEASE REVIEW THE
  TAXPAYER IDENTIFICATION            ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM
  NUMBER ("TIN") AND CERTIFICATION   W-9 FOR ADDITIONAL DETAILS. YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE
                                     BOX IN PART 2 OF SUBSTITUTE FORM W-9.
                                                         CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER:
                                     I CERTIFY UNDER PENALTIES OF PERJURY THAT A TAXPAYER IDENTIFICATION NUMBER HAS NOT BEEN
                                     ISSUED TO ME AND EITHER (1) I HAVE MAILED OR DELIVERED AN APPLICATION TO RECEIVE A TAXPAYER
                                     IDENTIFICATION NUMBER TO THE APPROPRIATE INTERNAL REVENUE SERVICE CENTER OR SOCIAL SECURITY
                                     ADMINISTRATION OFFICE OR (2) I INTEND TO DO SO IN THE NEAR FUTURE. I UNDERSTAND THAT IF I
                                     DO NOT PROVIDE A TAXPAYER IDENTIFICATION NUMBER BY THE TIME OF PAYMENT, 31% OF ALL PAYMENTS
                                     MADE TO ME WILL BE WITHHELD UNTIL I PROVIDE A NUMBER.
                                     SIGNATURE                                            DATE:                         , 1997
                                                -----------------------------------------       ------------------------
</TABLE>
 
                             THE INFORMATION AGENT:
 
                    CORPORATE INVESTOR COMMUNICATIONS, INC.
                               111 Commerce Road
                          Carlstadt, New Jersey 07072
                           (888) 881-0526 (toll free)
                             Banks and Brokers call
                                 (888) 349-2003

<PAGE>   1
 
                    NOTICE OF GUARANTEED DELIVERY AND PROXY
                                      FOR
 
                              THE SOUTHERN COMPANY
                           OFFER TO PURCHASE FOR CASH
                         ANY AND ALL OUTSTANDING SHARES
                 OF THE FOLLOWING SERIES OF PREFERRED STOCK OF
 
                           MISSISSIPPI POWER COMPANY
                                Preferred Stock:
 
                         4.40% Series ($100 par value)
                         4.60% Series ($100 par value)
                         4.72% Series ($100 par value)
 
     This form, or a form substantially equivalent to this form, must be used to
accept the Offer (as defined below) if certificates for shares of a series of
preferred stock of Mississippi Power Company (the "Company"), a Mississippi
corporation and direct utility subsidiary of The Southern Company, listed above
(each a "Series of Preferred") to be tendered pursuant to the Offer (the
"Shares") are not immediately available, if the procedure for book-entry
transfer cannot be completed on a timely basis, or if time will not permit all
other documents required by the Letter of Transmittal and Proxy to be delivered
to the Depositary on or prior to the Expiration Date (as defined in the Offer to
Purchase and Proxy Statement referred to below). Such form may be delivered by
hand or transmitted by mail or by facsimile transmission to the Depositary. See
"Terms of the Offer--Procedure for Tendering Shares" in the Offer to Purchase
and Proxy Statement.
 
     A SEPARATE NOTICE OF GUARANTEED DELIVERY AND PROXY MUST BE USED FOR EACH
SERIES OF PREFERRED.
 
     THE ELIGIBLE INSTITUTION WHICH COMPLETES THIS FORM MUST COMMUNICATE THE
GUARANTEE TO THE DEPOSITARY AND MUST DELIVER THE LETTER OF TRANSMITTAL AND PROXY
AND CERTIFICATES FOR SHARES TO THE DEPOSITARY WITHIN THE TIME SHOWN HEREIN.
FAILURE TO DO SO COULD RESULT IN A FINANCIAL LOSS TO SUCH ELIGIBLE INSTITUTION.
 
                      TO: THE BANK OF NEW YORK, DEPOSITARY
 
<TABLE>
<S>                                    <C>
          By Mail:                         By Hand or Overnight Courier:
 
Tender & Exchange Department               Tender & Exchange Department
       P.O. Box 11248                           101 Barclay Street
    Church Street Station                   Receive and Deliver Window
New York, New York 10286-1248                New York, New York 10286
</TABLE>
 
                           By Facsimile Transmission:
 
                                 (212) 815-6213
 
                     Information and Confirm by Telephone:
 
                                 (800) 507-9357
<PAGE>   2
 
     DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OTHER THAN AS SET FORTH ABOVE OR
TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE NUMBER OTHER THAN ONE LISTED ABOVE
WILL NOT CONSTITUTE A VALID DELIVERY.
 
     This form is not to be used to guarantee signatures. If a signature on a
Letter of Transmittal and Proxy is required to be guaranteed by an Eligible
Institution (as defined in the Letter of Transmittal and Proxy) under the
instructions thereto, such signature guarantee must appear in the applicable
space provided in the signature box on the Letter of Transmittal and Proxy.
 
     The undersigned hereby tenders to The Southern Company, a Delaware
corporation ("Southern"), upon the terms and subject to the conditions set forth
in the Offer to Purchase and Proxy Statement, dated November 3, 1997 (the "Offer
to Purchase and Proxy Statement"), and the related Letter of Transmittal and
Proxy (which together constitute the "Offer"), receipt of which is hereby
acknowledged, the number of Shares listed below, pursuant to the guaranteed
delivery procedure set forth in "Terms of the Offer--Procedure for Tendering
Shares" in the Offer to Purchase and Proxy Statement. PREFERRED SHAREHOLDERS
(INCLUDING PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES SUBSEQUENT TO THE RECORD
DATE) WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN FAVOR
OF THE PROPOSED AMENDMENT TO THE COMPANY'S ARTICLES OF INCORPORATION, AS AMENDED
(THE "CHARTER"), AS SET FORTH IN THE OFFER TO PURCHASE AND PROXY STATEMENT (THE
"PROPOSED AMENDMENT"). PREFERRED SHAREHOLDERS WHO PURCHASE OR WHOSE PURCHASE
SETTLES OR IS REGISTERED AFTER THE CLOSE OF BUSINESS ON NOVEMBER 6, 1997 (THE
"RECORD DATE") AND WHO WISH TO TENDER THEIR SHARES IN THE OFFER MUST ARRANGE
WITH THEIR SELLER TO RECEIVE A DULY COMPLETED, VALID AND UNREVOKED PROXY (WHICH
MAY BE IN THE FORM OF IRREVOCABLE ASSIGNMENT OF PROXY ATTACHED HERETO) FROM THE
HOLDER OF RECORD ON THE RECORD DATE AND INCLUDE SUCH PROXY WITH THIS NOTICE OF
GUARANTEED DELIVERY AND PROXY OR VOTE SUCH PROXY FOR THE PROPOSED AMENDMENT AT
THE SPECIAL MEETING (AS DEFINED IN THE OFFER TO PURCHASE AND PROXY STATEMENT).
THE OFFER IS CONDITIONED UPON THE PROPOSED AMENDMENT BEING APPROVED AND ADOPTED
AT THE SPECIAL MEETING. IN ADDITION, PREFERRED SHAREHOLDERS HAVE THE RIGHT TO
VOTE FOR THE PROPOSED AMENDMENT REGARDLESS OF WHETHER THEY TENDER THEIR SHARES
BY CASTING THEIR VOTE AND SIGNING THE PROXY CONTAINED WITHIN THE ACCOMPANYING
LETTER OF TRANSMITTAL AND PROXY OR BY VOTING IN PERSON AT THE SPECIAL MEETING.
IF THE PROPOSED AMENDMENT IS APPROVED AND ADOPTED, THE COMPANY WILL MAKE A
SPECIAL CASH PAYMENT (AS DEFINED IN THE OFFER TO PURCHASE AND PROXY STATEMENT)
TO EACH PREFERRED SHAREHOLDER WHO VOTED IN FAVOR OF THE PROPOSED AMENDMENT,
PROVIDED THAT SUCH HOLDER'S SHARES ARE NOT TENDERED PURSUANT TO THE OFFER.
 
     The undersigned hereby also appoints Dwight H. Evans, Michael W. Southern
and Wayne Boston, or any of them, as proxies, each with the power to appoint his
or her substitute, and hereby authorizes them to represent and to vote as
designated hereunder and in their discretion with respect to any other business
properly brought before the Special Meeting all shares of preferred stock of the
Company which the undersigned is entitled to vote at the Special Meeting of
Shareholders to be held on December 10, 1997, or any adjournment(s) or
postponement(s) thereof.
 
     THIS NOTICE OF GUARANTEED DELIVERY AND PROXY IS SOLICITED ON BEHALF OF THE
BOARD OF DIRECTORS OF THE COMPANY. THE PROXY CONTAINED HEREIN, WHEN PROPERLY
EXECUTED, WILL BE VOTED IN THE MANNER DIRECTED HEREIN BY THE UNDERSIGNED
SHAREHOLDER(S). If no direction is made, the proxy will be voted FOR Item 1. An
abstention is the equivalent of a vote AGAINST the Proposed Amendment.
 
     A holder of Preferred Shares who elects to tender Shares pursuant to this
Notice of Guaranteed Delivery and Proxy must check one of the boxes below:
 
     [ ] A duly completed, valid and unrevoked proxy indicating a vote FOR the
         Proposed Amendment is enclosed herein.
 
     [ ] A valid vote FOR the Proposed Amendment will be cast at the Special
         Meeting.
 
     [ ] A duly completed, valid and unrevoked proxy indicating a vote FOR the
         Proposed Amendment will be delivered within three New York Stock
         Exchange trading days after the execution of this Notice of Guaranteed
         Delivery and Proxy.
 
     Indicate your vote by an (X). The Board of Directors recommends voting FOR
Item 1.
 
                                        2
<PAGE>   3
 
     HOLDERS OF SHARES WHO WISH TO TENDER THEIR SHARES MUST VOTE FOR THE
PROPOSED AMENDMENT EITHER BY SUBMITTING THIS PROXY OR BY VOTING AT THE SPECIAL
MEETING.
 
ITEM 1.
 
     To remove from the Charter (i) Subparagraph (F)(b) of Paragraph FOURTH
under "General Provisions" of the "Preferred Stock" section, a provision
restricting the amount of securities representing unsecured indebtedness
issuable by the Company, (ii) Subparagraph (F)(a) of Paragraph FOURTH under
"General Provisions" of the "Preferred Stock" section, a provision which
requires the vote of the holders of at least a majority of the total voting
power of the Company's outstanding preferred stock to approve the sale of all or
substantially all of the Company's property and mergers or consolidations that
have not been approved under the Public Utility Holding Company Act of 1935, as
amended, and (iii) Subparagraph (B) (except the first paragraph therein) of
Paragraph FOURTH under "General Provisions" of the "Preferred Stock" section, a
provision restricting the ability of the Company to pay dividends on its common
stock in the event that its common equity capitalization falls below certain
levels.
 
                  [ ] FOR       [ ] AGAINST       [ ] ABSTAIN
 
Series of Preferred (check one):
 
                       Preferred Stock ($100 par value):
 
                                [ ] 4.40% Series
                                [ ] 4.60% Series
                                [ ] 4.72% Series
 
     A separate Notice of Guaranteed Delivery and Proxy must be used for each
Series of Preferred.
 
Number of Shares:
 
- ------------------------------------------------------
 
Certificate Nos. (if available):
 
- ------------------------------------------------------
 
- ------------------------------------------------------
 
- ------------------------------------------------------
 
- ------------------------------------------------------
 
     Any holders of Shares held of record on the Record Date in the name of
another holder must establish to the satisfaction of the Company its entitlement
to exercise or transfer this Proxy. This will ordinarily require an assignment
by such record holders in blank or, if not in blank, to and from each successive
transferee, including the holder, with each signature guaranteed by an Eligible
Institution. A form of irrevocable assignment of proxy has been provided herein.
 
Please check box if you plan to attend the Special Meeting.  [ ]
 
                                        3
<PAGE>   4
 
                            SIGNATURE(S) OF OWNER(S)
 
X
 -------------------------------------------------------------------------------
 
X
 -------------------------------------------------------------------------------
 
Dated:                                                                    , 1997
      --------------------------------------------------------------------
 
Name(s):
        ------------------------------------------------------------------------
                                 (PLEASE PRINT)
 
Capacity (full title):
                       ---------------------------------------------------------
 
Address:
          ----------------------------------------------------------------------
                               (INCLUDE ZIP CODE)
 
DAYTIME Area Code and Telephone No.: 
                                     -------------------------------------------
 
(Must be signed by the registered holder(s) exactly as name(s) appear(s) on the
stock certificate(s) or on a security position listing or by person(s)
authorized to become registered holder(s) by certificates and documents
transmitted herewith. If signature is by a trustee, executor, administrator,
guardian, attorney-in-fact, officer of a corporation or other person acting in a
fiduciary or representative capacity, please set forth full title and see
Instruction 5 to the Letter of Transmittal and Proxy.)
 
If Shares will be tendered by
book-entry transfer, Name of
Tendering Institution:
 
- --------------------------------------
Account No.                         at
           -----------------------
The Depository Trust Company
 
- --------------------------------------
             Signature(s)
 
- --------------------------------------
     Name(s) of Record Holders(s)
            (Please Print)
 
- --------------------------------------
               Address
 
- --------------------------------------
    Area Code and Telephone Number
 
                                        4
<PAGE>   5
 
     IF SELLING SHARES SUBSEQUENT TO NOVEMBER 3, 1997, A RECORD HOLDER MUST
                   COMPLETE THE FOLLOWING IRREVOCABLE PROXY.
 
           PLEASE SIGN THIS TO IRREVOCABLY TRANSFER A PREFERRED STOCK
              PROXY TO A SUBSEQUENT HOLDER OF PREFERRED STOCK WHO
                 WAS NOT A HOLDER OF RECORD ON NOVEMBER 3, 1997
 
                               IRREVOCABLE PROXY
                         with respect to shares of the
                       ________ Series of Preferred Stock
                                       of
                   MISSISSIPPI POWER COMPANY (THE "COMPANY")
 
                  The undersigned hereby irrevocably appoints
 
                      ------------------------------------
                        Type or Print Name of Transferee
 
as attorney and proxy, with full power of substitution, to vote and otherwise
act for and in the name(s) of the undersigned with respect to the Shares
indicated below which were held of record by the undersigned on November 3,
1997, in the manner in which the undersigned would be entitled to vote and
otherwise act in respect of such Shares on any and all matters.
 
     This proxy shall be effective whether or not the Shares indicated below are
tendered in the Offer.
 
     This instrument supersedes and revokes any and all previous appointments of
proxies heretofore made by the undersigned with respect to the Shares indicated
below as to any and all matters. THIS PROXY IS IRREVOCABLE AND IS COUPLED WITH
AN INTEREST.
 
     All authority conferred or agreed to be conferred herein shall survive the
death or incapacity of the undersigned, and any obligation of the undersigned
hereunder shall be binding upon the heirs, executors, administrators, legal and
personal representatives, successors in interest and assigns of the undersigned.
The undersigned understands that tenders of Shares pursuant to any of the
procedures described in the Offer to Purchase and Proxy Statement and in the
Letter of Transmittal and Proxy will constitute a binding agreement between the
undersigned and the Company upon the terms and subject to the conditions of the
Offer.
 
<TABLE>
<S>                                            <C>
- ---------------------------------------------------------------------------------------------
                               DESCRIPTION OF PREFERRED STOCK
- ---------------------------------------------------------------------------------------------
            CERTIFICATE NUMBER(S)                             AGGREGATE NUMBER
          (ATTACH LIST IF NECESSARY)                             OF SHARES
- ---------------------------------------------------------------------------------------------
 
- ---------------------------------------------------------------------------------------------
 
- ---------------------------------------------------------------------------------------------
 
- ---------------------------------------------------------------------------------------------
                                               TOTAL:
- ---------------------------------------------------------------------------------------------
- --------------------------------------------       ------------------------------------------
       Signature of Record Holder or                      Signature of Record Holder or
            Authorized Signatory                               Authorized Signatory
 
- --------------------------------------------       ------------------------------------------
             Type or Print Name                                 Type or Print Name
 
Dated:                                , 1997       Dated:                              , 1997
       -------------------------------                    -----------------------------

</TABLE>
 
Tax Identification or Social Security No(s).
                                             -----------------------------------
 
                                        5
<PAGE>   6
 
Must be signed by holder(s) exactly as name(s) appear(s) on the Record Date on
certificate(s) for the Shares or on a security position listing or by person(s)
authorized to become holder(s) by certificates and documents transmitted
herewith. If signature is by a trustee, executor, administrator, guardian,
attorney-in-fact, officer of a corporation, agent or other person acting in a
fiduciary or representative capacity, please provide the following information
and see Instruction 5 of the Letter of Transmittal and Proxy.
 
<TABLE>
<S>                                            <C>
Name                                           Address

- ---------------------------------------------  ---------------------------------------------
 
- ---------------------------------------------  ---------------------------------------------
                Please Print                                 Include Zip Code
</TABLE>
 
Area Code and Tel. No.
                        --------------------------------------------------------
Capacity (Full Title)
                       ---------------------------------------------------------

- --------------------------------------------------------------------------------
 
                           GUARANTEE OF SIGNATURE(S)
                   (IF REQUIRED -- SEE INSTRUCTIONS 1 AND 5)
 
Name of Firm:
               -----------------------------------------------------------------
 
Authorized Signature:
                      ----------------------------------------------------------
 
Title:
      --------------------------------------------------------------------------
 
Dated:                                                                    , 1997
       ------------------------------------------------------------------ 
 
                                        6
<PAGE>   7
 
               GUARANTEE (NOT TO BE USED FOR SIGNATURE GUARANTEE)
 
     The undersigned, a firm that is a member of a registered national
securities exchange or the National Association of Securities Dealers, Inc. or a
commercial bank or trust company having an office or correspondent in the United
States, guarantees to deliver to the Depositary at one of its addresses set
forth above certificate(s) for the Shares tendered hereby, in proper form for
transfer, or a confirmation of the book-entry transfer of the Shares tendered
hereby into the Depositary's account at The Depository Trust Company, in each
case together with properly completed and duly executed Letter(s) of Transmittal
and Proxy (or facsimile(s) thereof), with any required signature guarantee(s)
and any other required documents, all within three New York Stock Exchange
trading days after the date hereof.
 
<TABLE>
<S>                                            <C>
- ---------------------------------------------  ---------------------------------------------
                Name of Firm                               Authorized Signature
 
- ---------------------------------------------  ---------------------------------------------
                   Address                                         Name
 
- ---------------------------------------------  ---------------------------------------------
            City, State, Zip Code                                  Title
 
- ---------------------------------------------
                Area Code and
              Telephone Number
 
Dated:                                 , 1997
      ---------------------------------
</TABLE>
 
           DO NOT SEND STOCK CERTIFICATES WITH THIS FORM. YOUR STOCK
      CERTIFICATES MUST BE SENT WITH THE LETTER OF TRANSMITTAL AND PROXY.
 
                                        7

<PAGE>   1
 
                              MERRILL LYNCH & CO.
 
                             THE DEALER MANAGER FOR
 
                              THE SOUTHERN COMPANY
 
                           OFFER TO PURCHASE FOR CASH
           ANY AND ALL OUTSTANDING SHARES OF THE FOLLOWING SERIES OF
                               PREFERRED STOCK OF
 
                           MISSISSIPPI POWER COMPANY
 
<TABLE>
<CAPTION>
                                                                                        PURCHASE
                                                            OUTSTANDING     CUSIP         PRICE
TITLE OF SERIES OF PREFERRED                                  SHARES       NUMBER      (PER SHARE)
- ----------------------------                                -----------   ---------    -----------
<S>                                                         <C>           <C>          <C>
Preferred Stock ($100 par value)
  4.40% Series............................................    40,000      605417203      $87.13
  4.60% Series............................................    20,099      605417302      $85.98
  4.72% Series............................................    50,000      605417401      $93.47
</TABLE>
 
     THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY
TIME, ON DECEMBER 10, 1997, UNLESS THE OFFER IS EXTENDED.
 
                                                                November 3, 1997
 
To Brokers, Dealers, Commercial Banks,
  Trust Companies and Other Nominees:
 
     In our capacity as Dealer Manager, we are enclosing the material listed
below relating to the invitation of The Southern Company, a Delaware corporation
("Southern"), to the holders of each series of preferred stock of Mississippi
Power Company (the "Company"), a Mississippi corporation and direct utility
subsidiary of Southern, listed above (each a "Series of Preferred") to tender
any and all of their shares of a Series of Preferred ("Shares") for purchase at
the purchase price per Share listed above plus from the Company the Interim
Dividend (as defined in the Offer to Purchase and Proxy Statement (as defined
below)), net to the seller in cash, upon the terms and subject to the conditions
set forth in the Offer to Purchase and Proxy Statement, dated November 3, 1997
(the "Offer to Purchase and Proxy Statement"), and in the Letter of Transmittal
and Proxy for the Shares tendered. As to each Series of Preferred, the Offer to
Purchase and Proxy Statement, together with the applicable Letter of Transmittal
and Proxy, constitutes the "Offer." Southern will purchase all Shares validly
tendered and not withdrawn, upon the terms and subject to the conditions of the
Offer. The Offer for a Series of Preferred is not conditioned upon any minimum
number of Shares of such Series of Preferred being tendered and is independent
of the Offer for any other Series of Preferred. PREFERRED SHAREHOLDERS
(INCLUDING PREFERRED SHAREHOLDERS WHO ACQUIRE SHARES AFTER THE RECORD DATE) WHO
WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN FAVOR OF THE
PROPOSED AMENDMENT TO THE COMPANY'S ARTICLES OF INCORPORATION, AS AMENDED, AS
SET FORTH IN THE OFFER TO PURCHASE AND PROXY STATEMENT (THE "PROPOSED
AMENDMENT"). THE OFFER IS CONDITIONED UPON THE PROPOSED AMENDMENT BEING APPROVED
AND ADOPTED AT THE SPECIAL MEETING (AS DEFINED IN THE OFFER TO PURCHASE AND
PROXY STATEMENT). IN ADDITION, PREFERRED SHAREHOLDERS HAVE THE RIGHT TO VOTE FOR
THE PROPOSED AMENDMENT REGARDLESS OF WHETHER THEY TENDER THEIR SHARES. SEE
"PROPOSED AMENDMENT AND PROXY SOLICITATION," "TERMS OF THE OFFER -- CERTAIN
CONDITIONS OF THE OFFER" AND "TERMS OF THE OFFER -- EXTENSION OF TENDER PERIOD;
TERMINATION; AMENDMENTS" IN THE OFFER TO PURCHASE AND PROXY STATEMENT.
 
     IN ORDER TO VALIDLY TENDER SHARES PURSUANT TO THE OFFER, PREFERRED
SHAREHOLDERS WHO ACQUIRE SHARES DURING THE PERIOD BEGINNING TWO DAYS PRIOR TO
THE RECORD DATE AND UP TO AND INCLUDING THE EXPIRATION DATE MUST OBTAIN AN
ASSIGNMENT OF PROXY FROM THE SELLER OF SUCH SHARES AND VOTE SUCH PROXY IN FAVOR
OF THE PROPOSED AMENDMENT. IN ORDER TO FACILITATE THE TRANSFER OF SHARES DURING
THE PERIOD DESCRIBED ABOVE, THE
<PAGE>   2
 
SHARES OF EACH SERIES OF PREFERRED WILL TRADE "WITH PROXY" IN THE
OVER-THE-COUNTER MARKET. SETTLEMENT OF ALL TRADES DURING THE PERIOD DESCRIBED
ABOVE SHOULD INCLUDE AN ASSIGNMENT OF PROXY FROM THE SELLER.
 
     The Shares will trade, during the period which begins two days prior to the
Record Date and which will end at the close of business on the Expiration Date,
in the over-the-counter market under the symbol "MPRLT" for the 4.40% Series of
Preferred, "MPRPT" for the 4.60% Series of Preferred and "MSPPT" for the 4.72%
Series of Preferred, indicating that such shares are trading "with proxy." A
Preferred Shareholder who acquires Shares during this period must obtain, or
have its authorized representative obtain, an assignment of proxy (which is
included in the applicable Letter of Transmittal and Proxy) at settlement from
the seller. The National Association of Securities Dealers, Inc. (the "NASD")
and The Depository Trust Company have issued notices informing their members and
participants that the Shares are trading "with proxy" and that settlement of all
trades during the period described above should include an assignment of proxy
from the seller.
 
     We are asking you to contact your clients for whom you hold Shares
registered in your name (or in the name of your nominee) or who hold Shares
registered in their own names. Please bring the Offer to their attention as
promptly as possible.
 
     Southern will pay a solicitation fee of 1.50% of the par value per Share
for any Shares tendered, accepted for payment and paid for pursuant to the
Offer; provided, however, that with respect to transactions for beneficial
owners whose ownership equals or exceeds 2,500 Shares, Southern will pay a
solicitation fee of 1.00% of the par value per Share. The Company, however, will
pay a separate fee of 0.50% of the par value per Share for any Shares that are
not tendered pursuant to the Offer but which are voted in favor of the Proposed
Amendment; provided, however, that with respect to transactions for beneficial
owners whose ownership equals or exceeds 2,500 Shares, the Company will pay a
fee of 0.25% of the par value per Share. With respect to fees described in this
paragraph that involve transactions for beneficial owners of whose ownership is
less than 2,500 Shares, any fee payable thereunder shall be paid in full to the
Dealer Manager unless a Soliciting Dealer is designated, in which case such fee
shall be paid in full to the Soliciting Dealer (which designated Soliciting
Dealer may be the Dealer Manager). With respect to fees described in this
paragraph that involve transactions for beneficial owners whose ownership equals
or exceeds 2,500 Shares, any fee payable thereunder shall be paid in full to the
Dealer Manager unless a Soliciting Dealer is designated, in which case, 80% of
such fee shall be paid to the Dealer Manager and 20% of such fee shall be paid
to the Soliciting Dealer (which designated Soliciting Dealer may be the Dealer
Manager).
 
     A designated Soliciting Dealer is an entity covered by a Letter of
Transmittal and Proxy which designates its name as having solicited and obtained
the tender or proxy, and is (i) any broker or dealer in securities, including
the Dealer Manager in its capacity as a broker or dealer, which is a member of
any national securities exchange or of the NASD, (ii) any foreign broker or
dealer not eligible for membership in the NASD which agrees to conform to the
NASD's Rules of Fair Practice in soliciting tenders outside the United States to
the same extent as though it were an NASD member, or (iii) any bank or trust
company (each of which is referred to herein as a "Soliciting Dealer"). No such
fee shall be payable to a Soliciting Dealer with respect to the tender of Shares
by a holder unless the Letter of Transmittal and Proxy accompanying such tender
designates such Soliciting Dealer. No such fee shall be payable to a Soliciting
Dealer in respect of Shares registered in the name of such Soliciting Dealer
unless such Shares are held by such Soliciting Dealer as nominee and such Shares
are being tendered for the benefit of one or more beneficial owners identified
on the Letter of Transmittal and Proxy or on the Notice of Solicited Tenders and
Proxies (included below). No such fee shall be payable to a Soliciting Dealer if
such Soliciting Dealer is required for any reason to transfer the amount of such
fee to a depositing holder (other than itself). No such fee shall be paid to a
Soliciting Dealer with respect to Shares tendered for such Soliciting Dealer's
own account. No broker, dealer, bank, trust company or fiduciary shall be deemed
to be the agent of Southern, the Company, the Depositary (as defined below), the
Dealer Manager or the Information Agent for purposes of the Offer. For all
purposes noted in all materials relating to the Offer, the term "solicit" shall
be deemed to mean no more than "processing shares tendered," "processing shares
voted" or "forwarding to customers materials relating to the Offer."
 
                                        2
<PAGE>   3
 
     Southern will also, upon request, reimburse Soliciting Dealers for
reasonable and customary handling and mailing expenses incurred by them in
forwarding materials relating to the Offer to their customers. Southern will pay
all stock transfer taxes applicable to its purchase of Shares pursuant to the
offer, subject to Instruction 6 of the Letter of Transmittal and Proxy.
 
     IN ORDER FOR A SOLICITING DEALER TO RECEIVE A SOLICITATION FEE, THE BANK OF
NEW YORK, AS DEPOSITARY (THE "DEPOSITARY"), MUST HAVE RECEIVED FROM SUCH
SOLICITING DEALER A PROPERLY COMPLETED AND DULY EXECUTED NOTICE OF SOLICITED
TENDERS AND PROXIES IN THE FORM ATTACHED HERETO (OR FACSIMILE THEREOF) WITHIN
THREE BUSINESS DAYS AFTER THE EXPIRATION OF THE OFFER.
 
     For your information and for forwarding to your clients for whom you hold
Shares registered in your name (or in the name of your nominee), we are
enclosing the following documents:
 
          1. The Offer to Purchase and Proxy Statement, dated November 3, 1997.
 
          2. A separate Letter of Transmittal and Proxy for each Series of
     Preferred for your use and for the information of your clients.
 
          3. A letter to shareholders of the Company from its President and
     Chief Executive Officer.
 
          4. A Notice of Guaranteed Delivery and Proxy to be used to accept the
     Offer if the Shares and all other required documents cannot be delivered to
     the Depositary by the applicable Expiration Date (as defined in the Offer
     to Purchase and Proxy Statement).
 
          5. A form of letter which may be sent to your clients for whose
     accounts you hold Shares registered in your name or in the name of your
     nominee, with space for obtaining such clients' instructions with regard to
     the Offer by Southern and with regard to the proxy solicitation by the
     Company.
 
          6. Guidelines for Certification of Taxpayer Identification Number on
     Substitute Form W-9, providing information relating to backup federal
     income tax withholding.
 
          7. A return envelope addressed to The Bank of New York, the
     Depositary.
 
          8. A DTC Summary Voting Form to be used by participants of DTC to
     consolidate voting across multiple issues (i.e., summary ballot).
 
     EACH SERIES OF PREFERRED HAS ITS OWN LETTER OF TRANSMITTAL AND PROXY, AND
ONLY THE APPLICABLE LETTER OF TRANSMITTAL AND PROXY FOR A PARTICULAR SERIES OR A
NOTICE OF GUARANTEED DELIVERY AND PROXY MAY BE USED TO TENDER SHARES OF SUCH
SERIES OF PREFERRED.
 
     WE URGE YOU TO CONTACT YOUR CLIENTS AS PROMPTLY AS POSSIBLE. PLEASE NOTE
THAT THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY
TIME, ON DECEMBER 10, 1997, UNLESS THE OFFER IS EXTENDED.
 
     NEITHER SOUTHERN, THE COMPANY, THEIR RESPECTIVE BOARDS OF DIRECTORS NOR ANY
OF THEIR RESPECTIVE OFFICERS MAKES ANY RECOMMENDATION TO ANY PREFERRED
SHAREHOLDER AS TO WHETHER TO TENDER ANY OR ALL SHARES. EACH PREFERRED
SHAREHOLDER MUST MAKE HIS OR HER OWN DECISION AS TO WHETHER TO TENDER SHARES
AND, IF SO, HOW MANY SHARES TO TENDER.
 
                                        3
<PAGE>   4
 
     Any questions or requests for assistance or additional copies of the
enclosed materials may be directed to Corporate Investor Communications, Inc.,
the Information Agent, or to us, as Dealer Manager, at the respective addresses
and telephone numbers set forth on the back cover of the enclosed Offer to
Purchase and Proxy Statement.
 
                                          Very truly yours,
 
                                          Merrill Lynch & Co.
 
     NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU
OR ANY PERSON AS THE AGENT OF SOUTHERN, THE COMPANY, THE DEALER MANAGER, THE
INFORMATION AGENT OR THE DEPOSITARY, OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE
ANY DOCUMENT OR MAKE ANY STATEMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH
THE OFFER OTHER THAN THE DOCUMENTS ENCLOSED HEREWITH AND THE STATEMENTS
CONTAINED THEREIN.
 
                                        4
<PAGE>   5
 
                           MISSISSIPPI POWER COMPANY
 
          NOTICE OF SOLICITED TENDERS AND PROXIES FOR THE 4.40% SERIES
                             CUSIP NUMBER 605417203
 
     List below the number of Shares tendered, or voted in favor of the Proposed
Amendment but not tendered, by each beneficial owner whose tender or vote you
have solicited. All Shares in a Series of Preferred beneficially owned by a
beneficial owner, whether in one account or several, and in however many
capacities, must be aggregated for purposes of completing the table below. Any
questions as to what constitutes beneficial ownership should be directed to the
Depositary. If the space below is inadequate, list the Shares in a separate
signed schedule and affix the list to this Notice of Solicited Tenders and
Proxies.
 
     ALL NOTICES OF SOLICITED TENDERS AND PROXIES SHOULD BE DETACHED BY TEARING
ALONG THE PERFORATED EDGE AND RETURNED TO THE DEPOSITARY AT THE ADDRESS SET
FORTH ON THE BACK COVER OF THE OFFER TO PURCHASE WITHIN THREE NEW YORK STOCK
EXCHANGE TRADING DAYS AFTER THE EXPIRATION OF THE OFFER. NOTICES MAY BE FAXED TO
THE DEPOSITARY AT (212) 815-6213; CONFIRMATION TELEPHONE NUMBER (800) 507-9357.
ALL QUESTIONS CONCERNING THE NOTICES OF SOLICITED TENDERS AND PROXIES SHOULD BE
DIRECTED TO THE INFORMATION AGENT AT THE TELEPHONE NUMBER SET FORTH ON THE BACK
COVER OF THE OFFER TO PURCHASE.
 
     ALL SOLICITING DEALERS ARE REQUIRED TO COMPLETE THE FOLLOWING. PLEASE TYPE
OR PRINT NEATLY.
 
Beneficial Owners of Less Than 2,500 Shares -- Solicitation Fee of 1.50% of the
                   par value per Share ($1.50) (Tenders Only)
 
<TABLE>
<CAPTION>
                                                   Number of Shares            Number of
    DTC Participant           VOI Ticket             Requested for        Beneficial Owner(s)
        Number                  Number*                 Payment               Represented
    <S>                       <C>                  <C>                    <C>
 
</TABLE>
 
 Beneficial Owners of 2,500 or More Shares -- Solicitation Fee of 1.00% of the
                   par value per Share ($1.00) (Tenders Only)
 
<TABLE>
<CAPTION>
                                                                   Number of
                                            Number of Shares       Beneficial      Name of Soliciting
   DTC Participant         VOI Ticket        Requested for          Owner(s)         Merrill Lynch
       Number               Number*             Payment           Represented            Dealer
<C>                    <C>                 <C>                 <C>                 <C>
 
</TABLE>
 
- ---------------
 
* Complete if Shares delivered by book-entry transfer. Please submit a separate
  VOI ticket for Shares tendered when the solicitation fee is to be directed to
  another Soliciting Dealer.
 
                                        5
 
- -------------------------------------------------------------------------------
<PAGE>   6
 
                           MISSISSIPPI POWER COMPANY
 
          NOTICE OF SOLICITED TENDERS AND PROXIES FOR THE 4.40% SERIES
                             CUSIP NUMBER 605417203
                                  (CONTINUED)
 
Beneficial Owners of Less Than 2,500 Shares -- Solicitation Fee of 0.50% of the
                    par value per Share ($0.50) (Proxy Only)
 
<TABLE>
<CAPTION>
                             Number of Shares       Number of Beneficial
    DTC Participant           Requested for               Owner(s)
         Number                  Payment                Represented
    <S>                      <C>                    <C>
</TABLE>
 
 Beneficial Owners of 2,500 or More Shares -- Solicitation Fee of 0.25% of the
                    par value per Share ($0.25) (Proxy Only)
 
<TABLE>
<CAPTION>
                           Number of Shares      Number of Beneficial     Name of Soliciting
    DTC Participant          Requested for             Owner(s)              Merrill Lynch
        Number                  Payment               Represented               Dealer
<C>                     <C>                     <C>                     <C>
 
</TABLE>
 
     DO NOT SEND STOCK CERTIFICATES WITH THIS FORM. YOUR STOCK CERTIFICATES MUST
BE SENT WITH THE LETTER OF TRANSMITTAL AND PROXY.
 
     PLEASE COMPLETE THE SIGNATURE FORM ON THE LAST PAGE.
 
                                        6
 
- --------------------------------------------------------------------------------
<PAGE>   7
 
                           MISSISSIPPI POWER COMPANY
 
          NOTICE OF SOLICITED TENDERS AND PROXIES FOR THE 4.60% SERIES
                             CUSIP NUMBER 605417302
 
     List below the number of Shares tendered, or voted in favor of the Proposed
Amendment but not tendered, by each beneficial owner whose tender or vote you
have solicited. All Shares in a Series of Preferred beneficially owned by a
beneficial owner, whether in one account or several, and in however many
capacities, must be aggregated for purposes of completing the table below. Any
questions as to what constitutes beneficial ownership should be directed to the
Depositary. If the space below is inadequate, list the Shares in a separate
signed schedule and affix the list to this Notice of Solicited Tenders and
Proxies.
 
     ALL NOTICES OF SOLICITED TENDERS AND PROXIES SHOULD BE DETACHED BY TEARING
ALONG THE PERFORATED EDGE AND RETURNED TO THE DEPOSITARY AT THE ADDRESS SET
FORTH ON THE BACK COVER OF THE OFFER TO PURCHASE WITHIN THREE NEW YORK STOCK
EXCHANGE TRADING DAYS AFTER THE EXPIRATION OF THE OFFER. NOTICES MAY BE FAXED TO
THE DEPOSITARY AT (212) 815-6213; CONFIRMATION TELEPHONE NUMBER (800) 507-9357.
ALL QUESTIONS CONCERNING THE NOTICES OF SOLICITED TENDERS AND PROXIES SHOULD BE
DIRECTED TO THE INFORMATION AGENT AT THE TELEPHONE NUMBER SET FORTH ON THE BACK
COVER OF THE OFFER TO PURCHASE.
 
     ALL SOLICITING DEALERS ARE REQUIRED TO COMPLETE THE FOLLOWING. PLEASE TYPE
OR PRINT NEATLY.
 
Beneficial Owners of Less Than 2,500 Shares -- Solicitation Fee of 1.50% of the
                   par value per Share ($1.50) (Tenders Only)
 
<TABLE>
<CAPTION>
                                                   Number of Shares            Number of
    DTC Participant           VOI Ticket             Requested for        Beneficial Owner(s)
        Number                  Number*                 Payment               Represented
<S>                           <C>                  <C>                    <C>

</TABLE>
 
 Beneficial Owners of 2,500 or More Shares -- Solicitation Fee of 1.00% of the
                   par value per Share ($1.00) (Tenders Only)
 
<TABLE>
<CAPTION>
                                           Number of Shares        Number of      Name of Soliciting
   DTC Participant        VOI Ticket         Requested for    Beneficial Owner(s)    Merrill Lynch
       Number               Number*             Payment           Represented           Dealer
<C>                   <C>                 <C>                 <C>                 <C>

</TABLE>
 
- ---------------
 
* Complete if Shares delivered by book-entry transfer. Please submit a separate
  VOI ticket for Shares tendered when the solicitation fee is to be directed to
  another Soliciting Dealer.
 
                                        7
 
- -------------------------------------------------------------------------------
<PAGE>   8
 
                           MISSISSIPPI POWER COMPANY
 
          NOTICE OF SOLICITED TENDERS AND PROXIES FOR THE 4.60% SERIES
                             CUSIP NUMBER 605417302
                                  (CONTINUED)
 
Beneficial Owners of Less Than 2,500 Shares -- Solicitation Fee of 0.50% of the
                    par value per Share ($0.50) (Proxy Only)
 
<TABLE>
<CAPTION>
                             Number of Shares       Number of Beneficial
    DTC Participant           Requested for               Owner(s)
         Number                  Payment                Represented
    <S>                      <C>                    <C>
 
</TABLE>
 
 Beneficial Owners of 2,500 or More Shares -- Solicitation Fee of 0.25% of the
                    par value per Share ($0.25) (Proxy Only)
 
<TABLE>
<CAPTION>
                           Number of Shares      Number of Beneficial     Name of Soliciting
    DTC Participant          Requested for             Owner(s)              Merrill Lynch
        Number                  Payment               Represented               Dealer
<C>                     <C>                     <C>                     <C>
 
</TABLE>
 
     DO NOT SEND STOCK CERTIFICATES WITH THIS FORM. YOUR STOCK CERTIFICATES MUST
BE SENT WITH THE LETTER OF TRANSMITTAL AND PROXY.
 
     PLEASE COMPLETE THE SIGNATURE FORM ON THE LAST PAGE.
 
                                        8
 
- --------------------------------------------------------------------------------
<PAGE>   9
 
                           MISSISSIPPI POWER COMPANY
 
          NOTICE OF SOLICITED TENDERS AND PROXIES FOR THE 4.72% SERIES
                             CUSIP NUMBER 605417401
 
     List below the number of Shares tendered, or voted in favor of the Proposed
Amendment but not tendered, by each beneficial owner whose tender or vote you
have solicited. All Shares in a Series of Preferred beneficially owned by a
beneficial owner, whether in one account or several, and in however many
capacities, must be aggregated for purposes of completing the table below. Any
questions as to what constitutes beneficial ownership should be directed to the
Depositary. If the space below is inadequate, list the Shares in a separate
signed schedule and affix the list to this Notice of Solicited Tenders and
Proxies.
 
     ALL NOTICES OF SOLICITED TENDERS AND PROXIES SHOULD BE DETACHED BY TEARING
ALONG THE PERFORATED EDGE AND RETURNED TO THE DEPOSITARY AT THE ADDRESS SET
FORTH ON THE BACK COVER OF THE OFFER TO PURCHASE WITHIN THREE NEW YORK STOCK
EXCHANGE TRADING DAYS AFTER THE EXPIRATION OF THE OFFER. NOTICES MAY BE FAXED TO
THE DEPOSITARY AT (212) 815-6213; CONFIRMATION TELEPHONE NUMBER (800) 507-9357.
ALL QUESTIONS CONCERNING THE NOTICES OF SOLICITED TENDERS AND PROXIES SHOULD BE
DIRECTED TO THE INFORMATION AGENT AT THE TELEPHONE NUMBER SET FORTH ON THE BACK
COVER OF THE OFFER TO PURCHASE.
 
     ALL SOLICITING DEALERS ARE REQUIRED TO COMPLETE THE FOLLOWING. PLEASE TYPE
OR PRINT NEATLY.
 
Beneficial Owners of Less Than 2,500 Shares -- Solicitation Fee of 1.50% of the
                  par value per Share ($1.50) (Tenders Only)
 
<TABLE>
<CAPTION>
                                                     Number of Shares             Number of
    DTC Participant            VOI Ticket              Requested for         Beneficial Owner(s)
        Number                   Number*                  Payment                Represented
    <S>                        <C>                   <C>                     <C>
 
</TABLE>
 
 Beneficial Owners of 2,500 or More Shares -- Solicitation Fee of 1.00% of the
                  par value per Share ($1.00) (Tenders Only)
 
<TABLE>
<CAPTION>
                                                                   Number of
                                            Number of Shares       Beneficial      Name of Soliciting
   DTC Participant         VOI Ticket        Requested for          Owner(s)         Merrill Lynch
       Number               Number*             Payment           Represented            Dealer
   <C>                    <C>                 <C>                 <C>                 <C>
 
</TABLE>
 
- ---------------
 
* Complete if Shares delivered by book-entry transfer. Please submit a separate
  VOI ticket for Shares tendered when the solicitation fee is to be directed to
  another Soliciting Dealer.
 
                                        9
 
- --------------------------------------------------------------------------------
<PAGE>   10
 
                           MISSISSIPPI POWER COMPANY
 
          NOTICE OF SOLICITED TENDERS AND PROXIES FOR THE 4.72% SERIES
                             CUSIP NUMBER 605417401
                                  (CONTINUED)
 
Beneficial Owners of Less Than 2,500 Shares -- Solicitation Fee of 0.50% of the
                    par value per Share ($0.50) (Proxy Only)
 
<TABLE>
<CAPTION>
                             Number of Shares       Number of Beneficial
    DTC Participant           Requested for               Owner(s)
         Number                  Payment                Represented
    <S>                      <C>                    <C>
     
</TABLE>
 
 Beneficial Owners of 2,500 or More Shares -- Solicitation Fee of 0.25% of the
                   par value per Share ($0.25) (Proxy Only)
 
<TABLE>
<CAPTION>
                           Number of Shares      Number of Beneficial     Name of Soliciting
    DTC Participant          Requested for             Owner(s)              Merrill Lynch
        Number                  Payment               Represented               Dealer
<C>                     <C>                     <C>                     <C>
</TABLE>
 
     DO NOT SEND STOCK CERTIFICATES WITH THIS FORM. YOUR STOCK CERTIFICATES MUST
BE SENT WITH THE LETTER OF TRANSMITTAL AND PROXY.
 
     PLEASE COMPLETE THE SIGNATURE FORM ON THE LAST PAGE.
 
                                       10
 
- --------------------------------------------------------------------------------
<PAGE>   11


                     SOLICITATION FEE PAYMENT INSTRUCTIONS
 
ISSUE CHECK TO:
 

Firm
      --------------------------------------------------------------------------
                                 (Please Print)
 
Attention
          ----------------------------------------------------------------------
 
Address
        ------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                               (Include Zip Code)
 
Phone Number
             -------------------------------------------------------------------
 
Taxpayer Identification or Social Security No.
                                               ---------------------------------
 
Applicable VOI Number                              Number of Shares
                      -------------------------                      -----------

 
     IF SOLICITATION FEES ARE TO BE PAID TO ANOTHER ELIGIBLE INSTITUTION(S),
PLEASE COMPLETE THE FOLLOWING BOXES:
 
ISSUE CHECK TO:
 

Firm
      --------------------------------------------------------------------------
                                 (Please Print)
 
Attention
          ----------------------------------------------------------------------
 
Address
        ------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                               (Include Zip Code)
 
Phone Number
             -------------------------------------------------------------------
 
Taxpayer Identification or Social Security No.
                                               ---------------------------------
 
Applicable VOI Number                              Number of Shares
                      -------------------------                      -----------
Series
       --------------------------
 
- --------------------------------------------------------------------------------
ISSUE CHECK TO:
 

Firm
      --------------------------------------------------------------------------
                                 (Please Print)
 
Attention
          ----------------------------------------------------------------------
 
Address
        ------------------------------------------------------------------------
 
- --------------------------------------------------------------------------------
                               (Include Zip Code)
 
Phone Number
             -------------------------------------------------------------------
 
Taxpayer Identification or Social Security No.
                                               ---------------------------------
 
Applicable VOI Number                              Number of Shares
                      -------------------------                      -----------
Series
        ------------------------------
 
NOTE: IF ADDITIONAL PAYMENT INSTRUCTIONS, PLEASE COPY AND ATTACH.
 
                                       11
 
- --------------------------------------------------------------------------------
<PAGE>   12
 
     All questions as to the validity, form and eligibility (including time of
receipt) of Notices of Solicited Tenders and Proxies will be determined by the
Depositary, in its sole discretion, which determination will be final and
binding. Neither the Depositary nor any other person will be under any duty to
give notification of any defects or irregularities in any Notice of Solicited
Tenders and Proxies or incur any liability for failure to give such
notification.
 
     The undersigned hereby confirms that: (i) it has complied with the
applicable requirements of the Securities Exchange Act of 1934, as amended, and
the applicable rules and regulations thereunder, in connection with such
solicitation; (ii) it is entitled to such compensation for such solicitation
under the terms and conditions of the Offer; (iii) in soliciting tenders of
Shares, it has used no soliciting materials other than those furnished by
Southern; and (iv) if it is a foreign broker or dealer not eligible for
membership in the NASD, it has agreed to conform to the NASD's Rules of Fair
Practice in making solicitations.
 
Firm Name:
           ---------------------------------------------------------------------
 
By:
    ----------------------------------------------------------------------------
 
Title:
       -------------------------------------------------------------------------
 
Address (Including Zip Code):
                              --------------------------------------------------
 
Area Code and Telephone Number:
                                ------------------------------------------------
 
                                       12
 
- --------------------------------------------------------------------------------

<PAGE>   1
 
                              THE SOUTHERN COMPANY
 
                           OFFER TO PURCHASE FOR CASH
           ANY AND ALL OUTSTANDING SHARES OF THE FOLLOWING SERIES OF
                               PREFERRED STOCK OF
 
                           MISSISSIPPI POWER COMPANY
 
<TABLE>
<CAPTION>
                                                          OUTSTANDING     CUSIP      PURCHASE PRICE
TITLE OF SERIES OF PREFERRED                                SHARES       NUMBER       (PER SHARE)
- ----------------------------                              -----------   ---------    --------------
<S>                                                       <C>           <C>          <C>
Preferred Stock ($100 par value)
  4.40% Series..........................................    40,000      605417203        $87.13
  4.60% Series..........................................    20,099      605417302        $85.98
  4.72% Series..........................................    50,000      605417401        $93.47
</TABLE>
 
     THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY
TIME, ON DECEMBER 10, 1997, UNLESS THE OFFER IS EXTENDED.
 
                                                                November 3, 1997
 
To Our Clients:
 
     Enclosed for your consideration are the Offer to Purchase and Proxy
Statement, dated November 3, 1997, and a separate Letter of Transmittal and
Proxy for each series of preferred stock listed above (each a "Series of
Preferred") of Mississippi Power Company (the "Company"), a Mississippi
corporation and direct utility subsidiary of The Southern Company ("Southern"),
of which you own shares. As to each Series of Preferred, the Offer to Purchase
and Proxy Statement, together with the applicable Letter of Transmittal and
Proxy, constitutes the "Offer" of Southern to purchase any and all shares of the
Series of Preferred ("Shares") at the purchase price per Share listed above plus
from the Company the Interim Dividend (as defined in the Offer to Purchase and
Proxy Statement (as defined below)), net to the seller in cash, upon the terms
and subject to the conditions of the Offer. Southern will purchase all Shares
validly tendered and not withdrawn, upon the terms and subject to the conditions
of the Offer. The Offer for a Series of Preferred is not conditioned upon any
minimum number of Shares of such Series of Preferred being tendered and is
independent of the Offer for any other Series of Preferred. Preferred
Shareholders (including Preferred Shareholders who acquire Shares subsequent to
the Record Date) who wish to tender their Shares pursuant to the Offer must vote
in favor of the proposed amendment to the Company's Articles of Incorporation,
as amended, as set forth in the Offer to Purchase and Proxy Statement (the
"Proposed Amendment"). The Offer is conditioned upon the Proposed Amendment
being approved and adopted at the Special Meeting (as defined in the Offer to
Purchase and Proxy Statement). In addition, Preferred Shareholders have the
right to vote for the Proposed Amendment regardless of whether they tender their
Shares. See "Proposed Amendment and Proxy Solicitation," "Terms of the
Offer -- Certain Conditions of the Offer" and "Terms of the Offer -- Extension
of Tender Period; Termination; Amendments" in the Offer to Purchase and Proxy
Statement.
 
     IN ORDER TO VALIDLY TENDER SHARES PURSUANT TO THE OFFER, PREFERRED
SHAREHOLDERS WHO ACQUIRE SHARES DURING THE PERIOD BEGINNING TWO DAYS PRIOR TO
THE RECORD DATE AND UP TO AND INCLUDING THE EXPIRATION DATE MUST OBTAIN AN
ASSIGNMENT OF PROXY FROM THE SELLER OF SUCH SHARES AND VOTE SUCH PROXY IN FAVOR
OF THE PROPOSED AMENDMENT. IN ORDER TO FACILITATE THE TRANSFER OF SHARES DURING
THE PERIOD DESCRIBED ABOVE, THE SHARES OF EACH SERIES OF PREFERRED WILL TRADE
"WITH PROXY" IN THE OVER-THE-COUNTER MARKET. SETTLEMENT OF ALL TRADES DURING THE
PERIOD DESCRIBED ABOVE SHOULD INCLUDE AN ASSIGNMENT OF PROXY FROM THE SELLER.
 
     The Shares will trade, during the period which begins two days prior to the
Record Date and which will end at the close of business on the Expiration Date,
in the over-the-counter market under the symbol "MPRWL" for the 4.40% Series of
Preferred, "MPRPT" for the 4.60% Series of Preferred and "MSPPT" for the 4.72%
Series of Preferred, indicating that such Shares are trading "with proxy." A
Preferred Shareholder who acquires Shares during this period must obtain, or
have its authorized representative obtain, an
<PAGE>   2
 
assignment of proxy (which is included in the applicable Letter of Transmittal
and Proxy) at settlement from the seller. The National Association of Securities
Dealers, Inc. (the "NASD") and The Depository Trust Company have issued notices
informing their members and participants that the Shares are trading "with
proxy" and that settlement of all trades during the period described above
should include an assignment of proxy from the seller.
 
     WE ARE THE HOLDER OF RECORD OF SHARES HELD FOR YOUR ACCOUNT BUT NOT
REGISTERED IN YOUR NAME. A TENDER OR A VOTE OF SUCH SHARES CAN BE MADE ONLY BY
US AS THE HOLDER OF RECORD AND PURSUANT TO YOUR INSTRUCTIONS. ANY LETTER OF
TRANSMITTAL AND PROXY FURNISHED TO YOU IS SOLELY FOR YOUR INFORMATION AND CANNOT
BE USED BY YOU TO TENDER OR VOTE SHARES HELD BY US FOR YOUR ACCOUNT.
 
     We request instructions as to whether you wish us to tender and/or vote any
or all of the Shares held by us for your account, upon the terms and subject to
the conditions set forth in the Offer.
 
     PLEASE READ THE FOLLOWING INFORMATION CAREFULLY:
 
          (1) The Offer is for any and all Shares outstanding as of November 3,
     1997. The Offer for a Series of Preferred is independent of the Offer for
     any other Series of Preferred.
 
          (2) The Offer and withdrawal rights will expire at 5:00 p.m., New York
     City time, on December 10, 1997, unless the Offer is extended with respect
     to a Series of Preferred. Your instructions to us should be forwarded to us
     in ample time to permit us to submit a tender on your behalf by the
     expiration of the Offer. If you would like to withdraw your Shares that we
     have tendered, you can withdraw them so long as the Offer remains open or
     at any time after the expiration of forty business days from the
     commencement of the Offer if such tendered Shares have not been accepted
     for payment.
 
          (3) Preferred Shareholders who wish to tender their Shares pursuant to
     the Offer must vote in favor of the Proposed Amendment. The Offer is
     conditioned upon the Proposed Amendment being approved and adopted at the
     Special Meeting.
 
          (4) Preferred Shareholders have the right to vote in favor of the
     Proposed Amendment regardless of whether they tender their Shares. If the
     Proposed Amendment is approved and adopted, the Company will make a special
     cash payment in the amount of 1.00% of the par value per Share to each
     Preferred Shareholder who voted in favor of the Proposed Amendment,
     provided that such Shares have not been tendered pursuant to the Offer.
 
          (5) Any stock transfer taxes applicable to the sale of Shares to
     Southern pursuant to the Offer will be paid by Southern, except as
     otherwise provided in Instruction 6 of the Letter of Transmittal and Proxy.
 
     NEITHER SOUTHERN, THE COMPANY, THEIR RESPECTIVE BOARDS OF DIRECTORS NOR ANY
OF THEIR RESPECTIVE OFFICERS MAKES ANY RECOMMENDATION TO ANY PREFERRED
SHAREHOLDER AS TO WHETHER TO TENDER ANY OR ALL SHARES. EACH PREFERRED
SHAREHOLDER MUST MAKE HIS OR HER OWN DECISION AS TO WHETHER TO TENDER SHARES
AND, IF SO, HOW MANY SHARES TO TENDER.
 
     If you wish to have us tender and/or vote any or all of your Shares held by
us for your account upon the terms and subject to the conditions set forth in
the Offer, please so instruct us by completing, executing, detaching and
returning to us the instruction form on the detachable part hereof. An envelope
to return your instructions to us is enclosed. If you authorize tender of your
Shares, all such Shares will be tendered unless otherwise specified on the
detachable part hereof. Your instructions should be forwarded to us in ample
time to permit us to submit a tender and/or vote on your behalf by the
expiration of the Offer or the Special Meeting, as applicable.
 
     The Offer is being made to all holders of Shares. Southern is not aware of
any state where the making of the Offer is prohibited by administrative or
judicial action pursuant to a valid state statute. If Southern becomes aware of
any valid state statute prohibiting the making of the Offer, Southern will make
a good faith
 
                                        2
<PAGE>   3
 
effort to comply with such statute. If, after such good faith effort, Southern
cannot comply with such statute, the Offer will not be made to, nor will tenders
be accepted from or on behalf of, holders of Shares in such state. In those
jurisdictions where the securities, blue sky or other laws require the Offer to
be made by a licensed broker or dealer, the Offer shall be deemed to be made on
behalf of Southern by the Dealer Manager (as defined in the Offer) or one or
more registered brokers or dealers licensed under the laws of such
jurisdictions.
 
                                        3
<PAGE>   4
 
                                  INSTRUCTIONS
             WITH RESPECT TO OFFER TO PURCHASE BY SOUTHERN FOR CASH
                       ANY AND ALL OUTSTANDING SHARES OF
                            THE PREFERRED STOCK OF,
                           AND PROXY SOLICITATION BY,
                           MISSISSIPPI POWER COMPANY
 
     The undersigned acknowledge(s) receipt of your letter and the enclosed
Offer to Purchase and Proxy Statement, dated November 3, 1997, and a separate
Letter of Transmittal and Proxy for each series of preferred stock of
Mississippi Power Company (the "Company") (each a "Series of Preferred") in
which the undersigned owns shares (as to each Series of Preferred, the Offer to
Purchase and Proxy Statement, together with the applicable Letter of Transmittal
and Proxy, constitutes the "Offer") in connection with the invitation of The
Southern Company ("Southern") to the holders of each Series of Preferred to
tender any and all of their shares of a Series of Preferred ("Shares") for
purchase at the purchase price per Share listed on the front cover of the Offer
to Purchase and Proxy Statement plus from the Company the Interim Dividend (as
defined in the Offer to Purchase and Proxy Statement), net to the seller in
cash, upon the terms and subject to the conditions of the Offer, and in
connection with the proxy solicitation being conducted by the Board of Directors
of the Company.
 
     This will instruct you to tender to Southern the number of Shares indicated
below (or, if no number is indicated below, all Shares) which are held by you
for the account of the undersigned, upon the terms and subject to the conditions
of the Offer.
 
<TABLE>
<S>                                                <C>
            SERIES OF PREFERRED                          NUMBER OF SHARES TO BE TENDERED*
- --------------------------------------------       --------------------------------------------
- --------------------------------------------       --------------------------------------------
- --------------------------------------------       --------------------------------------------
- --------------------------------------------       --------------------------------------------

</TABLE>
 
     You are further instructed to vote as designated hereunder in respect of
the Proposed Amendment all Shares which the undersigned is entitled to vote at
the Special Meeting:**
 
            [ ]  FOR            [ ]  AGAINST            [ ]  ABSTAIN
 
                                   SIGN HERE
        Signature(s):
                       ---------------------------------------------------------
        Name(s):
                       ---------------------------------------------------------
        Address:
                       ---------------------------------------------------------
 
                       ---------------------------------------------------------
        Dated:                                                            , 1997
                       --------------------------------------------------
        Social Security or Taxpayer Identification No.:
                                                        ------------------------
- ---------------
 
 * By executing and returning these Instructions, unless otherwise indicated, it
   will be assumed that all Shares held by us for your account are to be
   tendered.
** By executing and returning these Instructions, unless otherwise indicated, it
   will be assumed that all Shares held by us for your account are to be voted
   FOR the Proposed Amendment.
 
                                        4

<PAGE>   1

  This announcement is neither an offer to purchase nor a solicitation of an
offer to sell Shares. The Offers are made solely by the Offers to Purchase and
  Proxy Statements and the related Letters of Transmittal and Proxy, and are
being made to all holders of Shares. Southern is not aware of any jurisdiction
 where the making of the Offers or the tender of Shares is not in compliance
 with any applicable law. If Southern becomes aware of any jurisdiction where
the making of the Offers or the tender of Shares is not in compliance with any
applicable law, Southern will make a good faith effort to comply with such law.
 If, after such good faith effort, Southern cannot comply with such law, the
Offers will not be made to (nor will tenders be accepted from or on behalf of)
the owners of Shares residing in such jurisdiction. In any jurisdiction where
  the securities, blue sky or other laws require the Offers to be made by a
licensed broker or dealer, the Offers shall be deemed to be made on behalf of
 Southern by Merrill Lynch & Co. or one or more registered brokers or dealers
                licensed under the laws of such jurisdiction.

                           [SOUTHERN COMPANY LOGO]

                            THE SOUTHERN COMPANY
     NOTICE OF OFFER TO PURCHASE FOR CASH ANY AND ALL OUTSTANDING SHARES
              OF THE FOLLOWING SERIES OF ALABAMA POWER COMPANY

                      364,000 SHARES, PREFERRED STOCK,
    $100 PAR VALUE, 4.20% SERIES AT A PURCHASE PRICE OF $78.50 PER SHARE,
                           CUSIP NUMBER 010392207
                            (THE "TENDER OFFER")

                            ALABAMA POWER COMPANY

                         PROXY SOLICITATION FOR THE
        OUTSTANDING SHARES OF THE FOLLOWING SERIES OF PREFERRED STOCK

                 2,000,000 SHARES, CLASS A PREFERRED STOCK,
                      $25 STATED CAPITAL, 6.40% SERIES,
                           CUSIP NUMBER 010392678

                 1,520,000 SHARES, CLASS A PREFERRED STOCK,
                      $25 STATED CAPITAL, 6.80% SERIES,
                           CUSIP NUMBER 010392694

                 2,000,000 SHARES, CLASS A PREFERRED STOCK,
              $25 STATED CAPITAL, 1993 ADJUSTABLE RATE SERIES,
                           CUSIP NUMBER 010392660

                       50,000 SHARES, PREFERRED STOCK,
                        $100 PAR VALUE, 4.52% SERIES,
                           CUSIP NUMBER 010392306

                      100,000 SHARES, PREFERRED STOCK,
                        $100 PAR VALUE, 4.60% SERIES,
                           CUSIP NUMBER 010392405

                       60,000 SHARES, PREFERRED STOCK,
                        $100 PAR VALUE, 4.64% SERIES,
                           CUSIP NUMBER 010392504

                       50,000 SHARES, PREFERRED STOCK,
                        $100 PAR VALUE, 4.72% SERIES,
                           CUSIP NUMBER 010392603

                       80,000 SHARES, PREFERRED STOCK,
                        $100 PAR VALUE, 4.92% SERIES,
                           CUSIP NUMBER 010392702

                      500,000 SHARES, PREFERRED STOCK,
                  $100 STATED CAPITAL, 1988 AUCTION SERIES,
                           CUSIP NUMBER 010392736

                        200 SHARES, PREFERRED STOCK,
                $100,000 STATED CAPITAL, 1993 AUCTION SERIES,
                           CUSIP NUMBER 010392686
                         (THE "PROXY SOLICITATION")

FOR THE TENDER OFFER:

The Southern Company ("Southern"), a Delaware corporation, invites the holders
of the series of preferred stock listed above under the Tender Offer (the
"Series of Preferred") of Alabama Power Company (the "Company"), an Alabama
corporation and wholly-owned utility subsidiary of Southern, to tender any and
all of their shares of the Series of Preferred (the "Shares") for purchase at
the price per Share listed above, plus from the Company a dividend attributable
to the period ending on the payment date of the Offer, net to the seller in
cash, upon the terms and subject to the conditions set forth in the Offer to
Purchase and Proxy Statement dated November 3, 1997 and in the related Letter
of Transmittal and Proxy (which together constitute the "Offer").


<PAGE>   2

THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME,
ON DECEMBER 10, 1997 (THE "EXPIRATION DATE"), UNLESS THE OFFER IS EXTENDED.

THE OFFER FOR THE SERIES OF PREFERRED IS NOT CONDITIONED UPON ANY MINIMUM
NUMBER OF SHARES OF SUCH SERIES OF PREFERRED BEING TENDERED. THE OFFER,
HOWEVER, IS CONDITIONED UPON, AMONG OTHER THINGS, THE PROPOSED AMENDMENT, AS
DESCRIBED BELOW, BEING APPROVED AND ADOPTED AT THE SPECIAL MEETING. PREFERRED
SHAREHOLDERS OF THE COMPANY WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE
OFFER MUST VOTE IN FAVOR OF THE PROPOSED AMENDMENT. SEE "TERMS OF THE
OFFER--CERTAIN CONDITIONS OF THE OFFER" IN THE OFFER TO PURCHASE AND PROXY
STATEMENT.

Concurrently with the Offer, the Board of Directors of the Company is
soliciting proxies for use at the Special Meeting of Shareholders of the
Company to be held at the offices of its affiliate Georgia Power Company, 333
Piedmont Avenue, N.E., Atlanta, Georgia, on December 10, 1997 or any
adjournment or postponement of such meeting (the "Special Meeting"). The
Special Meeting is being held to consider amendments (the "Proposed Amendment")
to the Company's charter (the "Charter") which would remove provisions of the
Company's Charter that restrict the ability of the Company (i) to issue
unsecured indebtedness, (ii) to sell assets, merge or consolidate without
preferred shareholder approval under certain circumstances, (iii) to pay
dividends on its common stock in the event that its common equity
capitalization falls below certain levels and (iv) to pay dividends on its
common stock in the event that its retained earnings are not at least equal to
two times the annual dividends on its outstanding preferred stock. The Board of
Directors of the Company recommends voting FOR the Proposed Amendment.

HOLDERS OF THE SERIES OF PREFERRED WHO WISH TO TENDER THEIR SHARES MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT. HOWEVER, HOLDERS OF THE SERIES OF PREFERRED
HAVE THE RIGHT TO VOTE FOR THE PROPOSED AMENDMENT REGARDLESS OF WHETHER THEY
TENDER THEIR SHARES. IF THE PROPOSED AMENDMENT IS APPROVED AND ADOPTED, THE
COMPANY WILL MAKE A SPECIAL CASH PAYMENT EQUAL TO 1.00% OF THE PAR VALUE PER
SHARE FOR EACH SHARE PROPERLY VOTED IN FAVOR OF THE PROPOSED AMENDMENT,
PROVIDED THAT SUCH SHARES HAVE NOT BEEN TENDERED PURSUANT TO THE OFFER. THOSE
HOLDERS OF PREFERRED STOCK WHO VALIDLY TENDER THEIR SHARES WILL BE ENTITLED
ONLY TO THE PURCHASE PRICE PER SHARE LISTED ABOVE PLUS FROM THE COMPANY A
DIVIDEND ATTRIBUTABLE TO THE PERIOD ENDING ON THE PAYMENT DATE OF THE OFFER BUT
NOT THE SPECIAL CASH PAYMENT.

IN ORDER TO VALIDLY TENDER SHARES PURSUANT TO THE OFFER, PREFERRED SHAREHOLDERS
WHO ACQUIRE SHARES DURING THE PERIOD BEGINNING TWO DAYS PRIOR TO NOVEMBER 6,
1997 AND UP TO AND INCLUDING THE EXPIRATION DATE MUST OBTAIN AN ASSIGNMENT OF
PROXY FROM THE SELLER OF THE SHARES AND VOTE SUCH PROXY IN FAVOR OF THE
PROPOSED AMENDMENT. IN ORDER TO FACILITATE THE TRANSFER OF SHARES DURING THE
PERIOD DESCRIBED ABOVE, THE SHARES OF THE SERIES OF PREFERRED WILL TRADE "WITH
PROXY" IN THE OVER-THE-COUNTER MARKET. SETTLEMENT OF ALL TRADES DURING THE
PERIOD DESCRIBED ABOVE SHOULD INCLUDE AN ASSIGNMENT OF PROXY FROM THE SELLER.

Any holder of the Series of Preferred desiring to accept the Offer and tender
all or any portion of his or her Shares should either (i) request his or her
broker, dealer, commercial bank, trust company or nominee to effect the
transaction for him or her, or (ii) complete and sign the Letter of Transmittal
and Proxy in accordance with the instructions in the Letter of Transmittal and
Proxy, mail or deliver the same and any other required documents to The Bank of
New York (the "Depositary"), and deliver the certificates for such Shares to
the Depositary, along with the Letter of Transmittal and Proxy, or tender such
Shares pursuant to the procedure for book-entry transfer set forth in the Offer
to Purchase and Proxy Statement under "Terms of the Offer--Procedure for
Tendering Shares," on or prior to the Expiration Date (set forth above). A
holder of the Series of Preferred whose Shares are registered in the name of a
broker, dealer, commercial bank, trust company or nominee must contact such
broker, dealer, commercial bank, trust company or nominee if he or she desires
to tender such Shares. Any holder of the Series of Preferred who desires to
tender Shares and whose certificates for such Shares are not immediately
available, or who cannot comply in a timely manner with the procedure for
book-entry transfer, should tender such Shares by following the procedures for
guaranteed delivery set forth in the Offer to Purchase and Proxy Statement
under "Terms of the Offer--Procedure for Tendering Shares." Southern will pay a
solicitation fee for any Shares tendered, accepted for payment and paid for
pursuant to the Offer. See "Fees and Expenses Paid to Dealers" in the Offer to
Purchase and Proxy Statement.


<PAGE>   3

ONLY THE LETTER OF TRANSMITTAL AND PROXY FOR THE SERIES OF PREFERRED OR A
NOTICE OF GUARANTEED DELIVERY AND PROXY MAY BE USED TO TENDER SHARES OF THE
SERIES OF PREFERRED.

NEITHER SOUTHERN, THE COMPANY, THEIR RESPECTIVE BOARDS OF DIRECTORS, NOR ANY OF
THEIR RESPECTIVE OFFICERS MAKES ANY RECOMMENDATION TO ANY SHAREHOLDER AS TO
WHETHER TO TENDER ANY OR ALL SHARES. EACH SHAREHOLDER MUST MAKE HIS OR HER OWN
DECISION AS TO WHETHER TO TENDER SHARES AND, IF SO, HOW MANY SHARES TO TENDER.

Tenders of Shares of the Series of Preferred made pursuant to the Offer may be
withdrawn at any time on or prior to the Expiration Date. Thereafter, such
tenders are irrevocable, except that they may be withdrawn after January 2,
1998, unless theretofore accepted for payment by Southern as provided in the
Offer to Purchase and Proxy Statement.

The Offer to Purchase and Proxy Statement is first being mailed on or about
November 3, 1997.

THE OFFER TO PURCHASE AND PROXY STATEMENT AND THE RELATED LETTER OF TRANSMITTAL
AND PROXY CONTAIN IMPORTANT INFORMATION WHICH SHOULD BE READ BEFORE ANY
DECISION IS MADE WITH RESPECT TO THE OFFER.

FOR THE PROXY SOLICITATION:

The Board of Directors of the Company is soliciting proxies of holders of the
shares of the series of preferred stock listed above under the Proxy
Solicitation (the "Proxy Only Shares") with respect to the Proposed Amendment.
The Special Meeting of Shareholders, at which the Proposed Amendment will be
considered, is scheduled to occur on December 10, 1997.

If the Proposed Amendment is approved and adopted, the Company will make a
special cash payment to each holder of Proxy Only Shares who properly voted his
Shares in favor of the Proposed Amendment in the amount of (i) 1.00% of the par
value per Proxy Only Share for the 4.52% Series, the 4.60% Series, the 4.64%
Series, the 4.72% Series and the 4.92% Series; (ii) 1.00% of the stated capital
per Proxy Only Share for the 6.80% Series, the 6.40% Series and the 1993
Adjustable Rate Series and (iii) 0.25% of the stated capital per Proxy Only
Share for the 1988 Auction Series and the 1993 Auction Series. If a Preferred
Shareholder votes against the Proposed Amendment or abstains, such Preferred
Shareholder shall not be entitled to the special cash payment (regardless of
whether the Proposed Amendment is approved and adopted).


<PAGE>   4

                            THE SOUTHERN COMPANY
     NOTICE OF OFFER TO PURCHASE FOR CASH ANY AND ALL OUTSTANDING SHARES
              OF THE FOLLOWING SERIES OF GEORGIA POWER COMPANY

                      433,774 SHARES, PREFERRED STOCK,
  $100 STATED VALUE, $4.60 SERIES AT A PURCHASE PRICE OF $85.98 PER SHARE,
                           CUSIP NUMBER 373334200

                       70,000 SHARES, PREFERRED STOCK,
$100 STATED VALUE, $4.60 (1962) SERIES AT A PURCHASE PRICE OF $91.09 PER SHARE,
                           CUSIP NUMBER 373334309

                       70,000 SHARES, PREFERRED STOCK,
$100 STATED VALUE, $4.60 (1963) SERIES AT A PURCHASE PRICE OF $91.09 PER SHARE,
                           CUSIP NUMBER 373334408

                       50,000 SHARES, PREFERRED STOCK,
$100 STATED VALUE, $4.60 (1964) SERIES AT A PURCHASE PRICE OF $91.09 PER SHARE,
                           CUSIP NUMBER 373334507

                       60,000 SHARES, PREFERRED STOCK,
  $100 STATED VALUE, $4.72 SERIES AT A PURCHASE PRICE OF $93.47 PER SHARE,
                           CUSIP NUMBER 373334606

                      100,000 SHARES, PREFERRED STOCK,
  $100 STATED VALUE, $4.92 SERIES AT A PURCHASE PRICE OF $97.43 PER SHARE,
                           CUSIP NUMBER 373334705

                       70,000 SHARES, PREFERRED STOCK,
  $100 STATED VALUE, $4.96 SERIES AT A PURCHASE PRICE OF $98.22 PER SHARE,
                           CUSIP NUMBER 373334853

                       14,090 SHARES, PREFERRED STOCK,
  $100 STATED VALUE, $5.00 SERIES AT A PURCHASE PRICE OF $95.24 PER SHARE,
                           CUSIP NUMBER 373334804

                       90,000 SHARES, PREFERRED STOCK,
  $100 STATED VALUE, $5.64 SERIES AT A PURCHASE PRICE OF $100.00 PER SHARE,
                           CUSIP NUMBER 373334887
                            (THE "TENDER OFFER")

                            GEORGIA POWER COMPANY

                         PROXY SOLICITATION FOR THE
        OUTSTANDING SHARES OF THE FOLLOWING SERIES OF PREFERRED STOCK

                 3,000,000 SHARES, CLASS A PREFERRED STOCK,
           $25 STATED VALUE, ADJUSTABLE RATE (FIRST 1993) SERIES,
                           CUSIP NUMBER 373334580

                 4,000,000 SHARES, CLASS A PREFERRED STOCK,
           $25 STATED VALUE, ADJUSTABLE RATE (SECOND 1993) SERIES,
                           CUSIP NUMBER 373334572

                      120,000 SHARES, PREFERRED STOCK,
                      $100 STATED VALUE, $6.48 SERIES,
                           CUSIP NUMBER 373334879

                      100,000 SHARES, PREFERRED STOCK,
                      $100 STATED VALUE, $6.60 SERIES,
                           CUSIP NUMBER 373334861
                         (THE "PROXY SOLICITATION")

FOR THE TENDER OFFER:

The Southern Company ("Southern"), a Delaware corporation, invites the holders
of each series of preferred stock listed above under the Tender Offer (each, a
"Series of Preferred") of Georgia Power Company (the "Company"), a Georgia
corporation and wholly-owned utility subsidiary of Southern, to tender any and
all of their shares of a Series of Preferred (the "Shares") for purchase at the
price per Share listed above, plus from the Company a dividend attributable to
the period ending on the payment date of the Offer, net to the seller in cash,
upon the terms and subject to the conditions set forth in the Offer to Purchase
and Proxy Statement dated November 3, 1997 and in the related Letter of
Transmittal and Proxy (which together constitute the "Offer").

<PAGE>   5


THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME,
ON DECEMBER 10, 1997 (THE "EXPIRATION DATE"), UNLESS THE OFFER IS EXTENDED.

THE OFFER FOR A SERIES OF PREFERRED IS NOT CONDITIONED UPON ANY MINIMUM NUMBER
OF SHARES OF SUCH SERIES OF PREFERRED BEING TENDERED AND IS INDEPENDENT OF THE
OFFER FOR ANY OTHER SERIES OF PREFERRED. THE OFFER, HOWEVER, IS CONDITIONED
UPON, AMONG OTHER THINGS, THE PROPOSED AMENDMENT, AS DESCRIBED BELOW, BEING
APPROVED AND ADOPTED AT THE SPECIAL MEETING. PREFERRED SHAREHOLDERS OF THE
COMPANY WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT. SEE "TERMS OF THE OFFER--CERTAIN CONDITIONS
OF THE OFFER" IN THE OFFER TO PURCHASE AND PROXY STATEMENT.

Concurrently with the Offer, the Board of Directors of the Company is
soliciting proxies for use at the Special Meeting of Shareholders of the
Company to be held at the Company's office at 333 Piedmont Avenue, N.E.,
Atlanta, Georgia, on December 10, 1997 or any adjournment or postponement of
such meeting (the "Special Meeting"). The Special Meeting is being held to
consider amendments (the "Proposed Amendment") to the Company's charter (the
"Charter") which would remove provisions of the Company's Charter that restrict
the ability of the Company (i) to issue unsecured indebtedness, (ii) to sell
assets, merge or consolidate without preferred shareholder approval under
certain circumstances and (iii) to pay dividends on its common stock in the
event that its common equity capitalization falls below certain levels. The
Board of Directors of the Company recommends voting FOR the Proposed Amendment.

HOLDERS OF A SERIES OF PREFERRED WHO WISH TO TENDER THEIR SHARES MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT. HOWEVER, HOLDERS OF A SERIES OF PREFERRED HAVE
THE RIGHT TO VOTE FOR THE PROPOSED AMENDMENT REGARDLESS OF WHETHER THEY TENDER
THEIR SHARES. IF THE PROPOSED AMENDMENT IS APPROVED AND ADOPTED, THE COMPANY
WILL MAKE A SPECIAL CASH PAYMENT EQUAL TO 1.00% OF THE STATED VALUE PER SHARE
FOR EACH SHARE PROPERLY VOTED IN FAVOR OF THE PROPOSED AMENDMENT, PROVIDED THAT
SUCH SHARES HAVE NOT BEEN TENDERED PURSUANT TO THE OFFER. THOSE HOLDERS OF
PREFERRED STOCK WHO VALIDLY TENDER THEIR SHARES WILL BE ENTITLED ONLY TO THE
PURCHASE PRICE PER SHARE LISTED ABOVE PLUS FROM THE COMPANY A DIVIDEND
ATTRIBUTABLE TO THE PERIOD ENDING ON THE PAYMENT DATE OF THE OFFER BUT NOT THE
SPECIAL CASH PAYMENT.

IN ORDER TO VALIDLY TENDER SHARES PURSUANT TO THE OFFER, PREFERRED SHAREHOLDERS
WHO ACQUIRE SHARES DURING THE PERIOD BEGINNING TWO DAYS PRIOR TO NOVEMBER 6,
1997 AND UP TO AND INCLUDING THE EXPIRATION DATE MUST OBTAIN AN ASSIGNMENT OF
PROXY FROM THE SELLER OF SUCH SHARES AND VOTE SUCH PROXY IN FAVOR OF THE
PROPOSED AMENDMENT. IN ORDER TO FACILITATE THE TRANSFER OF SHARES DURING THE
PERIOD DESCRIBED ABOVE, THE SHARES OF EACH SERIES OF PREFERRED WILL TRADE "WITH
PROXY" IN THE OVER-THE-COUNTER MARKET. SETTLEMENT OF ALL TRADES DURING THE
PERIOD DESCRIBED ABOVE SHOULD INCLUDE AN ASSIGNMENT OF PROXY FROM THE SELLER.

Any holder of a Series of Preferred desiring to accept the Offer and tender all
or any portion of his or her Shares should either (i) request his or her
broker, dealer, commercial bank, trust company or nominee to effect the
transaction for him or her, or (ii) complete and sign the Letter of Transmittal
and Proxy in accordance with the instructions in the Letter of Transmittal and
Proxy, mail or deliver the same and any other required documents to The Bank of
New York (the "Depositary"), and deliver the certificates for such Shares to
the Depositary, along with the Letter of Transmittal and Proxy, or tender such
Shares pursuant to the procedure for book-entry transfer set forth in the Offer
to Purchase and Proxy Statement under "Terms of the Offer--Procedure for
Tendering Shares," on or prior to the Expiration Date (set forth above). A
holder of a Series of Preferred whose Shares are registered in the name of a
broker, dealer, commercial bank, trust company or nominee must contact such
broker, dealer, commercial bank, trust company or nominee if he or she desires
to tender such Shares. Any holder of a Series of Preferred who desires to
tender Shares and whose certificates for such Shares are not immediately
available, or who cannot comply in a timely manner with the procedure for
book-entry transfer, should tender such Shares by following the procedures for
guaranteed delivery set forth in the Offer to Purchase and Proxy Statement
under "Terms of the Offer--Procedure for Tendering Shares." Southern will pay a
solicitation fee for any Shares tendered, accepted for payment and paid for 
pursuant to the Offer. See "Fees and Expenses Paid to Dealers" in the Offer 
to Purchase and Proxy Statement.

EACH SERIES OF PREFERRED HAS ITS OWN LETTER OF TRANSMITTAL AND PROXY, AND ONLY
THE APPLICABLE LETTER OF TRANSMITTAL AND PROXY FOR SUCH SERIES OF PREFERRED OR
A NOTICE OF GUARANTEED DELIVERY AND PROXY MAY BE USED TO TENDER SHARES OF SUCH
SERIES OF PREFERRED.

NEITHER SOUTHERN, THE COMPANY, THEIR RESPECTIVE BOARDS OF DIRECTORS, NOR ANY OF
THEIR RESPECTIVE OFFICERS MAKES ANY RECOMMENDATION TO ANY SHAREHOLDER AS TO
WHETHER TO TENDER ANY OR ALL SHARES. EACH SHAREHOLDER MUST MAKE HIS OR HER OWN
DECISION AS TO WHETHER TO TENDER SHARES AND, IF SO, HOW MANY SHARES TO TENDER.

Tenders of Shares of a Series of Preferred made pursuant to the Offer may be
withdrawn at any time on or prior to the Expiration Date. Thereafter, such
tenders are irrevocable, except that they may be withdrawn after January 2,
1998, unless theretofore accepted for payment by Southern as provided in the
Offer to Purchase and Proxy Statement.

The Offer to Purchase and Proxy Statement is first being mailed on or about
November 3, 1997.

THE OFFER TO PURCHASE AND PROXY STATEMENT AND THE RELATED LETTER OF TRANSMITTAL
AND PROXY CONTAIN IMPORTANT INFORMATION WHICH SHOULD BE READ BEFORE
ANY DECISION IS MADE WITH RESPECT TO THE OFFER.

FOR THE PROXY SOLICITATION:

The Board of Directors of the Company is soliciting proxies of holders of the
shares of the series of preferred stock listed above under the Proxy
Solicitation (the "Proxy Only Shares") with respect to the Proposed Amendment.
The Special Meeting of Shareholders, at which the Proposed Amendment will be
considered, is scheduled to occur on December 10, 1997.

If the Proposed Amendment is approved and adopted, the Company will make a
special cash payment to each holder of Proxy Only Shares who properly voted his
Shares in favor of the Proposed Amendment in the amount of 1.00% of the stated
value per Share. If a Preferred Shareholder votes against the Proposed
Amendment or abstains, such Preferred Shareholder shall not be entitled to the
special cash payment (regardless of whether the Proposed Amendment is approved
and adopted).


<PAGE>   6

                            THE SOUTHERN COMPANY
     NOTICE OF OFFER TO PURCHASE FOR CASH ANY AND ALL OUTSTANDING SHARES
                         OF THE FOLLOWING SERIES OF

                             GULF POWER COMPANY

                       51,026 SHARES, PREFERRED STOCK,
    $100 PAR VALUE, 4.64% SERIES AT A PURCHASE PRICE OF $86.73 PER SHARE,
                           CUSIP NUMBER 402479208

                       50,000 SHARES, PREFERRED STOCK,
   $100 PAR VALUE, 5.16% SERIES AT A PURCHASE PRICE OF $100.00 PER SHARE,
                           CUSIP NUMBER 402479307

                       50,000 SHARES, PREFERRED STOCK,
   $100 PAR VALUE, 5.44% SERIES AT A PURCHASE PRICE OF $100.00 PER SHARE,
                           CUSIP NUMBER 402479406

                      800,000 SHARES, PREFERRED STOCK,
  $25 STATED CAPITAL, 6.72% SERIES AT A PURCHASE PRICE OF $25.00 PER SHARE,
                           CUSIP NUMBER 402479836

                      600,000 SHARES, PREFERRED STOCK,
            $25 STATED CAPITAL, 1993 ADJUSTABLE RATE SERIES AT A
                     PURCHASE PRICE OF $25.00 PER SHARE,
                           CUSIP NUMBER 402479828

The Southern Company ("Southern"), a Delaware corporation, invites the holders
of each series of preferred stock listed above (each, a "Series of Preferred")
of Gulf Power Company (the "Company"), a Maine corporation and wholly-owned
utility subsidiary of Southern, to tender any and all of their shares of a
Series of Preferred (the "Shares") for purchase at the price per Share listed
above, plus from the Company a dividend attributable to the period ending on
the payment date of the Offer, net to the seller in cash, upon the terms and
subject to the conditions set forth in the Offer to Purchase and Proxy
Statement dated November 3, 1997 and in the related Letter of Transmittal and
Proxy (which together constitute the "Offer").

THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME,
ON DECEMBER 10, 1997 (THE "EXPIRATION DATE"), UNLESS THE OFFER IS EXTENDED.

THE OFFER FOR A SERIES OF PREFERRED IS NOT CONDITIONED UPON ANY MINIMUM NUMBER
OF SHARES OF SUCH SERIES OF PREFERRED BEING TENDERED AND IS INDEPENDENT OF THE
OFFER FOR ANY OTHER SERIES OF PREFERRED. THE OFFER, HOWEVER, IS CONDITIONED
UPON, AMONG OTHER THINGS, THE PROPOSED AMENDMENT, AS DESCRIBED BELOW, BEING
APPROVED AND ADOPTED AT THE SPECIAL MEETING. PREFERRED SHAREHOLDERS OF THE
COMPANY WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT. SEE "TERMS OF THE OFFER--CERTAIN CONDITIONS OF
THE OFFER" IN THE OFFER TO PURCHASE AND PROXY STATEMENT.

Concurrently with the Offer, the Board of Directors of the Company is
soliciting proxies for use at the Special Meeting of Shareholders of the
Company to be held at the offices of its affiliate Georgia Power Company, 333
Piedmont Avenue, N.E., Atlanta, Georgia, on December 10, 1997 or any
adjournment or postponement of such meeting (the "Special Meeting"). The
Special Meeting is being held to consider amendments (the "Proposed Amendment")
to the Company's charter (the "Charter") which would remove provisions of the
Company's Charter that restrict the ability of the Company (i) to issue
unsecured indebtedness, (ii) to sell assets, merge or consolidate without
preferred shareholder approval under certain circumstances and (iii) to pay
dividends on its common stock in the event that its common equity
capitalization falls below certain levels. The Board of Directors of the
Company recommends voting FOR the Proposed Amendment.

<PAGE>   7

HOLDERS OF A SERIES OF PREFERRED WHO WISH TO TENDER THEIR SHARES MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT. HOWEVER, HOLDERS OF A SERIES OF PREFERRED HAVE
THE RIGHT TO VOTE FOR THE PROPOSED AMENDMENT REGARDLESS OF WHETHER THEY TENDER
THEIR SHARES. IF THE PROPOSED AMENDMENT IS APPROVED AND ADOPTED, THE COMPANY
WILL MAKE A SPECIAL CASH PAYMENT EQUAL TO 1.00% OF THE PAR VALUE OR STATED
CAPITAL, AS APPLICABLE, PER SHARE FOR EACH SHARE PROPERLY VOTED IN FAVOR OF THE
PROPOSED AMENDMENT, PROVIDED THAT SUCH SHARES HAVE NOT BEEN TENDERED PURSUANT
TO THE OFFER. THOSE HOLDERS OF PREFERRED STOCK WHO VALIDLY TENDER THEIR SHARES
WILL BE ENTITLED ONLY TO THE PURCHASE PRICE PER SHARE LISTED ABOVE PLUS FROM
THE COMPANY A DIVIDEND ATTRIBUTABLE TO THE PERIOD ENDING ON THE PAYMENT DATE OF
THE OFFER BUT NOT THE SPECIAL CASH PAYMENT.

IN ORDER TO VALIDLY TENDER SHARES PURSUANT TO THE OFFER, PREFERRED SHAREHOLDERS
WHO ACQUIRE SHARES DURING THE PERIOD BEGINNING TWO BUSINESS DAYS PRIOR TO
NOVEMBER 6, 1997 AND UP TO AND INCLUDING THE EXPIRATION DATE MUST OBTAIN AN
ASSIGNMENT OF PROXY FROM THE SELLER OF SUCH SHARES AND VOTE SUCH PROXY IN FAVOR
OF THE PROPOSED AMENDMENT. IN ORDER TO FACILITATE THE TRANSFER OF SHARES DURING
THE PERIOD DESCRIBED ABOVE, THE SHARES OF EACH SERIES OF PREFERRED WILL TRADE
"WITH PROXY" IN THE OVER-THE-COUNTER MARKET. SETTLEMENT OF ALL TRADES DURING
THE PERIOD DESCRIBED ABOVE SHOULD INCLUDE AN ASSIGNMENT OF PROXY FROM THE
SELLER.

Any holder of a Series of Preferred desiring to accept the Offer and tender all
or any portion of his or her Shares should either (i) request his or her
broker, dealer, commercial bank, trust company or nominee to effect the
transaction for him or her, or (ii) complete and sign the Letter of Transmittal
and Proxy in accordance with the instructions in the Letter of Transmittal and
Proxy, mail or deliver the same and any other required documents to The Bank of
New York (the "Depositary"), and deliver the certificates for such Shares to
the Depositary, along with the Letter of Transmittal and Proxy, or tender such
Shares pursuant to the procedure for book-entry transfer set forth in the Offer
to Purchase and Proxy Statement under "Terms of the Offer--Procedure for
Tendering Shares," on or prior to the Expiration Date (set forth above). A
holder of a Series of Preferred whose Shares are registered in the name of a
broker, dealer, commercial bank, trust company or nominee must contact such
broker, dealer, commercial bank, trust company or nominee if he or she desires
to tender such Shares. Any holder of a Series of Preferred who desires to
tender Shares and whose certificates for such Shares are not immediately
available, or who cannot comply in a timely manner with the procedure for
book-entry transfer, should tender such Shares by following the procedures for
guaranteed delivery set forth in the Offer to Purchase and Proxy Statement
under "Terms of the Offer--Procedure for Tendering Shares." Southern will pay a
solicitation fee for any Shares tendered, accepted for payment and paid for
pursuant to the Offer. See "Fees and Expenses Paid to Dealers" in the Offer to
Purchase and Proxy Statement.

EACH SERIES OF PREFERRED HAS ITS OWN LETTER OF TRANSMITTAL AND PROXY, AND ONLY
THE APPLICABLE LETTER OF TRANSMITTAL AND PROXY FOR SUCH SERIES OF PREFERRED OR 
A NOTICE OF GUARANTEED DELIVERY AND PROXY MAY BE USED TO TENDER SHARES OF SUCH 
SERIES OF PREFERRED.

NEITHER SOUTHERN, THE COMPANY, THEIR RESPECTIVE BOARDS OF DIRECTORS, NOR ANY OF
THEIR RESPECTIVE OFFICERS MAKES ANY RECOMMENDATION TO ANY SHAREHOLDER AS TO
WHETHER TO TENDER ANY OR ALL SHARES. EACH SHAREHOLDER MUST MAKE HIS OR HER OWN
DECISION AS TO WHETHER TO TENDER SHARES AND, IF SO, HOW MANY SHARES TO TENDER.

Tenders of Shares of a Series of Preferred made pursuant to the Offer may be
withdrawn at any time on or prior to the Expiration Date. Thereafter, such
tenders are irrevocable, except that they may be withdrawn after January 2,
1998, unless theretofore accepted for payment by Southern as provided in the
Offer to Purchase and Proxy Statement.

The Offer to Purchase and Proxy Statement is first being mailed on or about
November 3, 1997.

THE OFFER TO PURCHASE AND PROXY STATEMENT AND THE RELATED LETTER OF TRANSMITTAL
AND PROXY CONTAIN IMPORTANT INFORMATION WHICH SHOULD BE READ BEFORE ANY
DECISION IS MADE WITH RESPECT TO THE OFFER.



<PAGE>   8

                            THE SOUTHERN COMPANY
     NOTICE OF OFFER TO PURCHASE FOR CASH ANY AND ALL OUTSTANDING SHARES
            OF THE FOLLOWING SERIES OF MISSISSIPPI POWER COMPANY

                       40,000 SHARES, PREFERRED STOCK,
    $100 PAR VALUE, 4.40% SERIES AT A PURCHASE PRICE OF $87.13 PER SHARE,
                           CUSIP NUMBER 605417203

                       20,099 SHARES, PREFERRED STOCK,
    $100 PAR VALUE, 4.60% SERIES AT A PURCHASE PRICE OF $85.98 PER SHARE,
                           CUSIP NUMBER 605417302

                       50,000 SHARES, PREFERRED STOCK,
    $100 PAR VALUE, 4.72% SERIES AT A PURCHASE PRICE OF $93.47 PER SHARE,
                           CUSIP NUMBER 605417401
                            (THE "TENDER OFFER")

                          MISSISSIPPI POWER COMPANY

                         PROXY SOLICITATION FOR THE
        OUTSTANDING SHARES OF THE FOLLOWING SERIES OF PREFERRED STOCK

                 600,000 SHARES, DEPOSITARY PREFERRED STOCK,
         $100 PAR VALUE, EACH REPRESENTING ONE-FOURTH OF A SHARE OF
                       PREFERRED STOCK,  6.32% SERIES,
                           CUSIP NUMBER 605417831

                 336,160 SHARES, DEPOSITARY PREFERRED STOCK,
         $100 PAR VALUE, EACH REPRESENTING ONE-FOURTH OF A SHARE OF
                       PREFERRED STOCK, 6.65% SERIES,
                           CUSIP NUMBER 605417815

                       50,000 SHARES, PREFERRED STOCK,
                        $100 PAR VALUE, 7.00% SERIES,
                           CUSIP NUMBER 605417500
                         (THE "PROXY SOLICITATION")

FOR THE TENDER OFFER:

The Southern Company ("Southern"), a Delaware corporation, invites the holders
of each series of preferred stock listed above under the Tender Offer (each, a
"Series of Preferred") of Mississippi Power Company (the "Company"), a
Mississippi corporation and wholly-owned utility subsidiary of Southern, to
tender any and all of their shares (the "Shares") for purchase at the price
per Share listed above, plus from the Company a dividend attributable to the
period ending on the payment date of the Offer, net to the seller in cash, upon
the terms and subject to the conditions set forth in the Offer to Purchase and
Proxy Statement dated November 3, 1997 and in the related Letter of Transmittal
and Proxy (which together constitute the "Offer").

THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME,
ON DECEMBER 10, 1997 (THE "EXPIRATION DATE"), UNLESS THE OFFER IS EXTENDED.

THE OFFER FOR A SERIES OF PREFERRED IS NOT CONDITIONED UPON ANY MINIMUM NUMBER
OF SHARES OF SUCH SERIES OF PREFERRED BEING TENDERED AND IS INDEPENDENT OF THE
OFFER FOR ANY OTHER SERIES OF PREFERRED. THE OFFER, HOWEVER, IS CONDITIONED
UPON, AMONG OTHER THINGS, THE PROPOSED AMENDMENT, AS DESCRIBED BELOW, BEING
APPROVED AND ADOPTED AT THE SPECIAL MEETING. PREFERRED SHAREHOLDERS OF THE
COMPANY WHO WISH TO TENDER THEIR SHARES PURSUANT TO THE OFFER MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT. SEE "TERMS OF THE OFFER--CERTAIN CONDITIONS 
OF THE OFFER" IN THE OFFER TO PURCHASE AND PROXY STATEMENT.

<PAGE>   9
Concurrently with the Offer, the Board of Directors of the Company is
soliciting proxies for use at the Special Meeting of Shareholders of the
Company to be held at the offices of its affiliate Georgia Power Company, 333
Piedmont Avenue, N.E., Atlanta, Georgia, on December 10, 1997 or any
adjournment or postponement of such meeting (the "Special Meeting"). The
Special Meeting is being held to consider amendments (the "Proposed Amendment")
to the Company's charter (the "Charter") which would remove provisions of the
Company's Charter that restrict the ability of the Company (i) to issue
unsecured indebtedness, (ii) to sell assets, merge or consolidate without
preferred shareholder approval under certain circumstances and (iii) to pay
dividends on its common stock in the event that its common equity
capitalization falls below certain levels. The Board of Directors of the
Company recommends voting FOR the Proposed Amendment.

HOLDERS OF A SERIES OF PREFERRED WHO WISH TO TENDER THEIR SHARES MUST VOTE IN
FAVOR OF THE PROPOSED AMENDMENT. HOWEVER, HOLDERS OF A SERIES OF PREFERRED HAVE
THE RIGHT TO VOTE FOR THE PROPOSED AMENDMENT REGARDLESS OF WHETHER THEY TENDER
THEIR SHARES. IF THE PROPOSED AMENDMENT IS APPROVED AND ADOPTED, THE COMPANY
WILL MAKE A SPECIAL CASH PAYMENT EQUAL TO 1.00% OF THE PAR VALUE PER SHARE FOR
EACH SHARE PROPERLY VOTED IN FAVOR OF THE PROPOSED AMENDMENT, PROVIDED THAT
SUCH SHARES HAVE NOT BEEN TENDERED PURSUANT TO THE OFFER. THOSE HOLDERS OF
PREFERRED STOCK WHO VALIDLY TENDER THEIR SHARES WILL BE ENTITLED ONLY TO THE
PURCHASE PRICE PER SHARE LISTED ABOVE PLUS FROM THE COMPANY A DIVIDEND
ATTRIBUTABLE TO THE PERIOD ENDING ON THE PAYMENT DATE OF THE OFFER BUT NOT THE
SPECIAL CASH PAYMENT.

IN ORDER TO VALIDLY TENDER SHARES PURSUANT TO THE OFFER, PREFERRED SHAREHOLDERS
WHO ACQUIRE SHARES DURING THE PERIOD BEGINNING TWO DAYS PRIOR TO NOVEMBER 6,
1997 AND UP TO AND INCLUDING THE EXPIRATION DATE MUST OBTAIN AN ASSIGNMENT OF
PROXY FROM THE SELLER OF SUCH SHARES AND VOTE SUCH PROXY IN FAVOR OF THE
PROPOSED AMENDMENT. IN ORDER TO FACILITATE THE TRANSFER OF SHARES DURING THE
PERIOD DESCRIBED ABOVE, THE SHARES OF EACH SERIES OF PREFERRED WILL TRADE "WITH
PROXY" IN THE OVER-THE-COUNTER MARKET. SETTLEMENT OF ALL TRADES DURING THE
PERIOD DESCRIBED ABOVE SHOULD INCLUDE AN ASSIGNMENT OF PROXY FROM THE SELLER.

Any holder of a Series of Preferred desiring to accept the Offer and tender all
or any portion of his or her Shares should either (i) request his or her
broker, dealer, commercial bank, trust company or nominee to effect the
transaction for him or her, or (ii) complete and sign the Letter of Transmittal
and Proxy in accordance with the instructions in the Letter of Transmittal and
Proxy, mail or deliver the same and any other required documents to The Bank of
New York (the "Depositary"), and deliver the certificates for such Shares to
the Depositary, along with the Letter of Transmittal and Proxy, or tender such
Shares pursuant to the procedure for book-entry transfer set forth in the Offer
to Purchase and Proxy Statement under "Terms of the Offer--Procedure for
Tendering Shares," on or prior to the Expiration Date (set forth above). A
holder of a Series of Preferred whose Shares are registered in the name of a
broker, dealer, commercial bank, trust company or nominee must contact such
broker, dealer, commercial bank, trust company or nominee if he or she desires
to tender such Shares. Any holder of a Series of Preferred who desires to
tender Shares and whose certificates for such Shares are not immediately
available, or who cannot comply in a timely manner with the procedure for
book-entry transfer, should tender such Shares by following the procedures for
guaranteed delivery set forth in the Offer to Purchase and Proxy Statement
under "Terms of the Offer--Procedure for Tendering Shares." Southern will pay a
solicitation fee for any Shares tendered, accepted for payment and paid for
pursuant to the Offer. See "Fees and Expenses Paid to Dealers" in the Offer to
Purchase and Proxy Statement.

EACH SERIES OF PREFERRED HAS ITS OWN LETTER OF TRANSMITTAL AND PROXY, AND ONLY
THE APPLICABLE LETTER OF TRANSMITTAL AND PROXY FOR SUCH SERIES OF PREFERRED OR
A NOTICE OF GUARANTEED DELIVERY AND PROXY MAY BE USED TO TENDER SHARES OF SUCH
SERIES OF PREFERRED.

NEITHER SOUTHERN, THE COMPANY, THEIR RESPECTIVE BOARDS OF DIRECTORS, NOR ANY OF
THEIR RESPECTIVE OFFICERS MAKES ANY RECOMMENDATION TO ANY SHAREHOLDER AS TO
WHETHER TO TENDER ANY OR ALL SHARES. EACH SHAREHOLDER MUST MAKE HIS OR HER OWN
DECISION AS TO WHETHER TO TENDER SHARES AND, IF SO, HOW MANY SHARES TO TENDER.

Tenders of Shares of a Series of Preferred made pursuant to the Offer may be
withdrawn at any time on or prior to the Expiration Date. Thereafter, such
tenders are irrevocable, except that they may be withdrawn after January 2, 
1998, unless theretofore accepted for payment by Southern as provided in the 
Offer to Purchase and Proxy Statement.

The Offer to Purchase and Proxy Statement is first being mailed on or about
November 3, 1997.

THE OFFER TO PURCHASE AND PROXY STATEMENT AND THE RELATED LETTER OF TRANSMITTAL
AND PROXY CONTAIN IMPORTANT INFORMATION WHICH SHOULD BE READ BEFORE ANY
DECISION IS MADE WITH RESPECT TO THE OFFER.

FOR THE PROXY SOLICITATION:

The Board of Directors of the Company is soliciting proxies of holders of the
shares of the series of preferred stock listed above under the Proxy
Solicitation (the "Proxy Only Shares") with respect to the Proposed Amendment.
The Special Meeting of Shareholders, at which the Proposed Amendment will be
considered, is scheduled to occur on December 10, 1997.

If the Proposed Amendment is approved and adopted, the Company will make a
special cash payment to each holder of Proxy Only Shares who properly voted his
Shares in favor of the Proposed Amendment in the amount of 1.00% of the par
value per Proxy Only Share. If a Preferred Shareholder votes against the
Proposed Amendment or abstains, such Preferred Shareholder shall not be
entitled to the special cash payment (regardless of whether the Proposed
Amendment is approved and adopted).


Questions and requests for assistance may be directed to the Information Agent
or the Dealer Manager as set forth below.  Requests for copies of the Offers to
Purchase and Proxy Statement and the related Letters of Transmittal and Proxy
or other tender offer or proxy materials may be directed to the Information
Agent and such copies will be furnished promptly at Southern's expense.
Preferred Shareholders may also contact their local broker, dealer, commercial
bank or trust company for assistance concerning the Offers.

                  The Information Agent for the Offers is:

                   CORPORATE INVESTOR COMMUNICATIONS, INC.
               111 Commerce Road, Carlstadt, New Jersey 07072
                         (888) 881-0526 (toll-free)
                  or Banks and Brokers call (888) 349-2003

                    The Dealer Manager for the Offers is:

                             MERRILL LYNCH & CO.
     World Financial Center, 250 Vesey Street, New York, New York 10281
                         1-888-ML4-TNDR (toll-free)
                           Attn: Susan L. Weinberg

November 3, 1997


<PAGE>   1
 
                          Mississippi Power Letterhead
 
                                                                November 3, 1997
 
Dear Shareholder:
 
     Please find enclosed important information pertaining to the following two
items:
 
     (i) a proposed amendment (the "Proposed Amendment") to the Articles of
Incorporation (the "Charter"), of Mississippi Power Company (the "Company")
which will be considered at a Special Meeting (the "Special Meeting") of its
Shareholders; and
 
     (ii) an offer by The Southern Company ("Southern") to purchase certain
outstanding shares (the "Shares") of the Company's preferred stock.
 
     We would greatly appreciate your giving prompt attention to the enclosed
material which you are urged to read in its entirety.
 
     The Charter presently restricts the ability of the Company to issue
unsecured indebtedness, to sell assets, merge or consolidate without preferred
shareholder approval under certain circumstances and to pay dividends on its
common stock in the event that its common equity capitalization falls below
certain levels. These restrictions limit the Company's flexibility in planning
and financing its business activities. Because financial flexibility and capital
cost reduction are crucial factors to success in a competitive utility
environment, the Company ultimately may be placed at a competitive disadvantage
if these restrictions are not removed from the Charter. The Proposed Amendment,
as set forth and explained in the enclosed Offer to Purchase and Proxy
Statement, would remove these restrictions.
 
     Concurrently with the Company's proxy solicitation, Southern is offering to
purchase all of the outstanding shares of certain series of the Company's
preferred stock. You must vote in favor of the Proposed Amendment in order to
tender your Shares. Southern's offer is conditioned upon the Proposed Amendment
being approved and adopted at the Special Meeting. In addition, you have the
right to vote for the Proposed Amendment regardless of whether you tender your
shares. If you vote in favor of the Proposed Amendment and it passes, you will
be entitled to receive a special cash payment equal to 1.00% of the par value
per Share (or $1.00 per Share) for each Share properly voted in favor of the
Proposed Amendment, provided your shares have not been tendered. Instructions
for tendering your shares and information pertaining to the special cash payment
are included with the enclosed material.
 
     Your Board of Directors recommends voting FOR the Proposed Amendment. It is
important to your interests that all shareholders, regardless of the number of
shares owned, vote at the Special Meeting. Even if you plan to attend the
Special Meeting, WE URGE YOU TO MARK, SIGN AND DATE THE ENCLOSED PROXY, WHICH IS
INCLUDED WITHIN THE ENCLOSED LETTER OF TRANSMITTAL AND PROXY, AND RETURN IT
PROMPTLY. By signing and returning your proxy promptly, you are assuring that
your shares will be voted.
 
     You are invited to attend the Special Meeting which will be held at the
offices of our affiliate Georgia Power Company, 333 Piedmont Avenue, N.E.,
Atlanta, Georgia, on December 10, 1997 at 4:15 p.m., Eastern time.
 
     If you have questions regarding the Proposed Amendment, the Special Meeting
or Southern's tender offer, please call Corporate Investor Communications, Inc.,
the Information Agent, at (888) 881-0526 (toll free) and (888) 349-2003 (banks
and brokers) or Merrill Lynch at (888) ML4-TNDR or (888) 654-8637 (toll free).
 
     Thank you for your continued interest in the Company.
 
                                          Sincerely yours,
 
                                          /s/ Dwight H. Evans
                                          Dwight H. Evans
                                          President and Chief
                                          Executive Officer

<PAGE>   1

                                                               EXHIBIT 99.a8

                         [SOUTHERN COMPANY LETTERHEAD]
                                                                   Nov. 3, 1997

              SOUTHERN COMPANY OFFERS TO PURCHASE PREFERRED STOCK

         Southern Company announced today offers to purchase certain series of
the outstanding shares of preferred stock of subsidiaries Alabama Power,
Georgia Power, Gulf Power and Mississippi Power.

         The company also announced that those subsidiaries are soliciting
proxies for use at special meetings of preferred shareholders, scheduled for
Dec. 10. The meetings would be to consider an amendment to each subsidiary's
charter. The amendment would eliminate restrictions on the subsidiary's ability
to issue unsecured indebtedness, sell assets, merge or consolidate without
preferred stockholder approval under certain circumstances, and pay dividends
on common stock.

         "The changes we're asking our preferred stockholders to consider would
make Southern Company more agile in a competitive environment," said W.L.
Westbrook, Southern Company's chief financial officer. "We're hoping to
eliminate certain charter restrictions to gain financial flexibility as we move
toward a more competitive energy market."

         The offers to purchase certain series of preferred stock will expire 5
p.m. Eastern time Dec. 10, unless any offer is extended.

         Purchase prices for each issue are indicated below:

<TABLE>
<CAPTION>

SERIES                                  CUSIP NUMBER                          PURCHASE PRICE PER SHARE
- ------                                  ------------                          ------------------------

<S>                                     <C>                                  <C> 
ALABAMA POWER COMPANY, PREFERRED
STOCK ($100 PAR VALUE)

4.20% Series                            010392207                            $ 78.50

GEORGIA POWER COMPANY, PREFERRED
STOCK ($100 STATED VALUE)

$4.60 Series                            373334200                            $ 85.98

$4.60 (1962) Series                     373334309                            $ 91.09

$4.60 (1963) Series                     373334408                            $ 91.09

$4.60 (1964) Series                     373334507                            $ 91.09

$4.72 Series                            373334606                            $ 93.47

$4.92 Series                            373334705                            $ 97.43

$4.96 Series                            373334853                            $ 98.22

$5.00 Series                            373334804                            $ 95.24

$5.64 Series                            373334887                            $100.00

GULF POWER COMPANY, PREFERRED STOCK
($100 PAR VALUE)

4.64% Series                            402479208                            $ 86.73

5.16% Series                            402479307                            $100.00

5.44% Series                            402479406                            $100.00

GULF POWER COMPANY, PREFERRED STOCK
($25 STATED CAPITAL)

6.72% Series                            402479836                            $ 25.00

AR 1993 Series                          402479828                            $ 25.00

MISSISSIPPI POWER COMPANY, PREFERRED
STOCK ($100 PAR VALUE)

4.40% Series                            605417203                            $ 87.13

4.60% Series                            605417302                            $ 85.98

4.72% Series                            605417401                            $ 93.47

</TABLE>


                                     (more)

<PAGE>   2

         In addition, holders selling their preferred stock will receive a
dividend based on the date the company buys the shares.

         The dealer manager for the tender offers is Merrill Lynch & Co. The
information agent is Corporate Investors Communications Inc. Shareholder
questions or requests for assistance may be directed toll-free to the
information agent at (888) 881-0526 or to Merrill Lynch at (888) 654-8637.

         Southern Company (NYSE: SO), the largest producer of electricity in
the United States, is the parent firm of Alabama Power, Georgia Power, Gulf
Power, Mississippi Power and Savannah Electric. Based in Atlanta, Southern
Company supplies electricity in nine countries on four continents and provides
energy-related marketing, trading and technical services and wireless
telecommunications. Southern Company's common stock is one of the 20 most
widely held corporate stocks in America.

                                   # # # # #

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

Important notes:

         Each of the offers for a series of preferred stock is independent of
the offers for the other series and is not conditioned upon any minimum number
of shares of such series being tendered. Each offer is conditioned upon, among
other things, the proposed charter amendment being approved and adopted at the
respective company's special meeting. Shareholders who wish to tender their
shares must vote in favor of the proposed charter amendment.

         This announcement is neither an offer to purchase nor a solicitation
of an offer to sell shares. The offers are made solely by the Offers to
Purchase and Proxy Statements, dated Nov. 3, 1997, and the related Letters of
Transmittal and Proxy and are not being made to (nor will tenders be accepted
from or on behalf of) owners of shares residing in any jurisdiction in which
the making of the offers or the acceptance thereof would not be in compliance
with the laws of such jurisdiction. In any jurisdiction, the laws of which
require the offers to be made by a licensed broker or dealer, the offers shall
be deemed made on behalf of Southern Company by Merrill Lynch & Co. or one or
more registered brokers or dealers licensed under the laws of such
jurisdiction. This announcement is also not a solicitation of proxies, which is
made only by the Proxy Statements, dated Nov. 3, 1997, and such Offers to
Purchase and Proxy Statements.

<PAGE>   1
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYOR -- Social Security numbers have nine digits separated by two hyphens: i.e.
000-00-0000. Employer identification numbers have nine digits separated by only
one hyphen: i.e. 00-0000000. The table below will help determine the number to
give the payor.
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------
                                            GIVE THE
                                        SOCIAL SECURITY
     FOR THIS TYPE OF ACCOUNT:            NUMBER OF --
- -----------------------------------------------------------
<C>  <S>                             <C>
 1.  An individual's account         The individual
 2.  Two or more individuals (joint  The actual owner of
     account)                        the account or, if
                                     combined funds, the
                                     first individual on
                                     the account(1)
 3.  Custodian account of a minor    The minor(2)
     (Uniform Gift to Minors Act)
 4.  a. The usual revocable savings  The grantor- trustee(1)
        trust account (grantor is
        also trustee)
     b. So-called trust account      The actual owner(1)
     that is not a legal or valid
        trust under State Law
 5.  Sole proprietorship account     The owner(3)
- -----------------------------------------------------------
</TABLE>
 
<TABLE>
<CAPTION>
- -----------------------------------------------------------
                                            GIVE THE
                                        SOCIAL SECURITY
     FOR THIS TYPE OF ACCOUNT:            NUMBER OF --
- -----------------------------------------------------------
<C>  <S>                             <C>
 
 6.  A valid trust, estate, or       The legal entity (Do
     pension trust                   not furnish the
                                     identifying number of
                                     the personal
                                     representative or
                                     trustee unless the
                                     legal entity itself is
                                     not designated in the
                                     account title)(4)
 7.  Corporate account               The corporation
 8.  Association, club, religious,   The organization
     charitable, educational or
     other tax-exempt organization
 9.  Partnership account             The partnership
10.  A broker or registered nominee  The broker or nominee
11.  Account with the Department of  The public entity
     Agriculture in the name of a
     public entity (such as a State
     or local government, school
     district or prison) that
     receives agricultural program
     payments
- -----------------------------------------------------------
</TABLE>
 
- ---------------
 
(1) List first and circle the name of the person whose number you furnish. If
    only one person on a joint account has a social security number, that
    person's number must be furnished.
(2) Circle the minor's name and furnish the minor's social security number.
(3) Show the name of the owner. May also use business name and its Employer
    Identification Number (if any).
(4) List first and circle the name of the valid trust, estate, or pension trust.
 
NOTE:If no name is circled when there is more than one name, the number will be
     considered to be that of the first name listed.
<PAGE>   2
 
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                      NUMBER (TIN) ON SUBSTITUTE FORM W-9
             (SECTION REFERENCES ARE TO THE INTERNAL REVENUE CODE)
 
                                     PAGE 2
 
NAME
   If you are an individual, generally provide the name shown on your social
security card. However, if you have changed your last name, for instance, due to
marriage, without informing the Social Security Administration of the name
change, please enter your first name and both the last name shown on your social
security card and your new last name.
 
OBTAINING A NUMBER
   If you don't have a taxpayer identification number ("TIN"), apply for one
immediately. To apply, obtain Form SS-5, Application for a Social Security
Number Card, Form SS-4, Application for Employer Identification Number, or, if
you are a U.S. resident alien for U.S. tax purposes, Form W-7, Application for
IRS Individual Taxpayer Identification Number, at the local office of the Social
Security Administration or the Internal Revenue Service (the "IRS").
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
   The following is a list of payees exempt from backup withholding and for
which no information reporting is required. For interest and dividends, all
listed payees are exempt except item (9). For broker transactions, payees listed
in (1) through (13), and a person registered under the Investment Advisors Act
of 1940 who regularly acts as a broker are exempt. Payments subject to reporting
under sections 6041 and 6041A are generally exempt from backup withholding only
if made to payees described in items (1) through (7), except that a corporation
that provides medical and health care services or bills and collects payments
for such services is not exempt from backup withholding or information
reporting.
   (1) A corporation.
   (2) An organization exempt from tax under section 501(a), or an individual
       retirement plan ("IRA"), or a custodial account under section 403(b)(7).
   (3) The United States or any agencies or instrumentalities.
   (4) A state, the District of Columbia, a possession of the United States, or
       any of their political subdivisions or instrumentalities.
   (5) A foreign government or any of its political subdivisions, agencies or
       instrumentalities.
   (6) An international organization or any of its agencies or
       instrumentalities.
   (7) A foreign central bank of issue.
   (8) A dealer in securities or commodities required to register in the U.S. or
       a possession of the U.S.
   (9) A futures commission merchant registered with the Commodity Futures
       Trading Commission.
  (10) A real estate investment trust.
  (11) An entity registered at all times during the tax year under the
       Investment Company Act of 1940.
  (12) A common trust fund operated by a bank under section 584(a).
  (13) A financial institution.
  (14) A middleman known in the investment community as a nominee or listed in
       the most recent publication of the American Society of Corporate
       Secretaries, Inc. Nominee List.
  (15) A trust exempt from tax under Section 664 or described in section 4947.
 
PAYMENTS EXEMPT FROM BACKUP WITHHOLDING
  Payments of dividends generally not subject to backup withholding also include
the following:
  - Payments to nonresident aliens subject to withholding under section 1441.
  - Payments to partnerships not engaged in a trade or business in the U.S. and
    which have at least one nonresident alien partner.
  - Payments made by certain foreign organizations.
  - Payments of interest generally not subject to backup withholding include the
    following:
  - Payments of interest on obligations issued by individuals.
    NOTE: You may be subject to backup withholding if this interest is $600 or
    more and is paid in the course of the payor's trade or business and you have
    not provided your correct TIN to the payor.
  - Payments of tax-exempt interest (including exempt interest dividends under
    section 852).
  - Payments described in section 6049(b)(5) to nonresident aliens.
  - Payments on tax-free covenant bonds under section 1451.
  - Payments made by certain foreign organizations.
  - Mortgage interest paid by you.
  Payments that are not subject to information reporting are also not subject to
backup withholding. For details, see sections 6041, 6041A(a), 6042, 6044, 6045,
6049, 6050A, and 6050N, and the regulations under those sections.
 
  PRIVACY ACT NOTICE. -- Section 6109 requires you to furnish your correct TIN
to persons who must file information returns with the IRS to report interest,
dividends and certain other income paid to you, mortgage interest you paid, the
acquisition or abandonment of secured property, or contributions you made to an
IRA. The IRS uses the numbers for identification purposes and to help verify the
accuracy of your tax return. The IRS may also provide this information to the
Department of Justice for civil and criminal litigation and to cities, states
and the District of Columbia to carry out their tax laws. You must provide your
TIN whether or not you are qualified to file a tax return. Payors must generally
withhold 31% of taxable interest, dividend, and certain other payments to a
payee who does not furnish a TIN to a payor. Certain penalties may also apply.
 
PENALTIES
(1) FAILURE TO FURNISH TIN. -- If you fail to furnish your correct TIN to a
payor, you are subject to a penalty of $50 for each such failure unless your
failure is due to reasonable cause and not to willful neglect.
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. -- If you
make a false statement with no reasonable basis that results in no imposition of
backup withholding, you are subject to a penalty of $500.
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- Willfully falsifying
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.
 
                       FOR ADDITIONAL INFORMATION CONTACT
                         YOUR TAX CONSULTANT OR THE IRS

<PAGE>   1
 
      SUMMARY INSTRUCTIONS FOR PARTICIPATING IN THE TENDER OFFER AND PROXY
 
     (1)  CHECK CONTENTS OF PACKAGE.  Before proceeding, please confirm that
          this package contains each of the following materials:
 
         - Letter from the President and Chief Executive Officer.
 
         - Offer to Purchase and Proxy Statement dated November 3, 1997.
 
         - Letter of Transmittal and Proxy relating to the applicable series of
           Preferred Stock.
 
         - Notice of Guaranteed Delivery.
 
         - Return envelope addressed to The Bank of New York, the Depositary for
           the Tender Offer.
 
         - W-9 Instruction Form.
 
     (2)  REVIEW MATERIALS CAREFULLY BEFORE DECIDING WHETHER TO
          PARTICIPATE.  Please review all enclosed materials carefully before
          deciding whether to participate in the tender offer.
 
         - IF YOUR SHARES ARE REGISTERED IN YOUR NAME and you decide to
           participate, you must follow the instructions in paragraphs (3) and
           (4) below.
 
         - IF YOUR SHARES ARE HELD BY A BROKER OR BANK FOR YOUR ACCOUNT and you
           decide to participate, you must contact your broker or bank and
           advise them to execute your instructions on your behalf.
 
     (3)  COMPLETE THE APPLICABLE LETTER OF TRANSMITTAL AND PROXY.  You must
          follow these instructions to complete the Letter of Transmittal and
          Proxy. The Letter of Transmittal and Proxy for each series is printed
          on green paper.
 
        (a) TENDER OFFER AND PROXY. If you wish to tender your shares pursuant
            to the Tender Offer, you must vote FOR Proposal 1.
 
             - Indicate your vote by an (X) on page 3 of the Letter of
               Transmittal and Proxy. Sign and date the box entitled
               "Signature(s) of Owner(s)" and print your capacity, address and
               daytime telephone number.
 
             - Complete the box entitled "Description of Shares Tendered" on
               page 4 of the Letter of Transmittal and Proxy.
 
             - Only complete the "Guarantee of Signature" section if the
               signatures are different from the registration on the face of the
               certificate.
 
             - Complete, sign and date the box entitled "Substitute Form W-9."
 
             - The following sections of the Letter of Transmittal and Proxy
               should be completed only if applicable:
 
               - Notice of Guaranteed Delivery:  If you cannot deliver your
                 preferred stock certificate(s) to the Depositary before
                 December 10, 1997, a broker must guarantee delivery of your
                 shares. The broker must complete the applicable portion of page
                 4 of the Letter of Transmittal and Proxy and submit the
                 separate document entitled "Notice of Guaranteed Delivery."
 
               - Soliciting Dealer:  If your tender has been solicited by a
                 Soliciting Dealer, please complete the box entitled "Solicited
                 Tenders and Proxies" on page 10 of the Letter of Transmittal
                 and Proxy.
 
               - Special Payment and Special Delivery Instructions:  If you
                 would like the check for the purchase price of shares purchased
                 pursuant to the Tender Offer or the certificates for shares not
                 purchased to be issued in the name of someone other than the
                 current holder or to be mailed to someone other than the
                 current holder, or to the current holder at an address other
                 than that shown on the current certificate, please complete the
                 boxes on
<PAGE>   2
 
                 page 9 entitled "Special Payment Instructions" and/or "Special
                 Delivery Instructions" in the Letter of Transmittal and Proxy.
                 To do either of these, you must have your signature guaranteed
                 by an eligible institution. (See Instructions 1 and 5 on the
                 Letter of Transmittal and Proxy with respect to guarantee of
                 signatures by an eligible institution.)
 
        (b) PROXY ONLY.  If you choose only to vote the proxy and will not
            tender your shares pursuant to the Tender Offer, please follow these
            instructions:
 
         - Indicate your vote by an (X) on page 3 of the Letter of Transmittal
           and Proxy. Sign and date the box entitled "Signature(s) of Owner(s)"
           and print your capacity, address and daytime telephone number.
 
         - Complete, sign and date the box entitled "Substitute Form W-9."
 
         - The following sections of the Letter of Transmittal and Proxy should
           be completed only if applicable:
 
               - Soliciting Dealer:  If your proxy has been solicited by a
                 Soliciting Dealer, please complete the box entitled "Solicited
                 Tenders and Proxies" on page 10 of the Letter of Transmittal
                 and Proxy.
 
               - If you would like the Special Cash Payment to be issued to or
                 mailed to someone other than the current holder, please
                 complete the boxes entitled "Special Payment Instructions"
                 and/or "Special Delivery Instructions" on page 9 of the Letter
                 of Transmittal and Proxy. To do either of these, you must have
                 your signature guaranteed by an eligible institution. (See
                 Instructions 1 and 5 on the Letter of Transmittal and Proxy
                 with respect to guarantee of signatures by an eligible
                 institution.)
 
     (4)  MAIL UNSIGNED PREFERRED STOCK CERTIFICATES AND SIGNED LETTER OF
          TRANSMITTAL AND PROXY TO THE DEPOSITARY.  Send the applicable Letter
          of Transmittal and Proxy to The Bank of New York, as Depositary, at
          the address shown on the Letter of Transmittal and Proxy. If you own
          more than one series of preferred stock, you must complete the
          specific Letter of Transmittal and Proxy that relates to each
          individual series. Use of registered or certified mail is recommended.
          PLEASE NOTE: If you are not tendering, DO NOT send in your
          certificates.
 
     IF YOU HAVE ANY QUESTIONS, HAVE NOT RECEIVED THE APPLICABLE LETTER(S) OF
TRANSMITTAL AND PROXY OR OTHER DOCUMENTS PERTAINING TO THE TENDER OFFER, OR NEED
ASSISTANCE IN COMPLETING THE APPLICABLE FORMS, PLEASE CONTACT THE INFORMATION
AGENT: CORPORATE INVESTOR COMMUNICATIONS, INC. AT (888) 881-0526 (TOLL-FREE).
 
                                        2

<PAGE>   1
                                URGENT NOTICE

November __, 1997


Dear Preferred Shareholder:


The Special Meeting of Shareholders of Mississippi Power Company is scheduled 
to be held on December 10, 1997, and we have attempted to contact you by 
telephone to discuss the important agenda.  To date we have been unable to 
reach you by phone.

It is extremely important that we discuss this critical Special Meeting and the
events surrounding it.  We would appreciate it if you would take a moment and
please call during business hours our Information Agent, Corporate Investor
Communications, Inc. (CIC) at (888) 881-0526.

Thank you for your interest in the affairs of Mississippi Power Company.  I 
appreciate your cooperation.

Sincerely,


Dwight H. Evans 
President and Chief
 Executive Officer





<PAGE>   1
 
                           MISSISSIPPI POWER COMPANY
 
                      PROXY FORM FOR DTC PARTICIPANTS ONLY
 
     The undersigned hereby appoints Dwight H. Evans, Michael W. Southern and
Wayne Boston, or any of them, as proxies, each with the power to appoint his or
her substitute, and hereby authorizes them to represent and to vote as
designated hereunder and in their discretion with respect to any other business
properly brought before the Special Meeting all the shares of preferred stock of
the Company which the undersigned is entitled to vote at the Special Meeting or
any adjournments or postponements thereof.
 
     THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF THE COMPANY.
The proxy contained herein, when properly executed, will be voted in the manner
directed herein by the undersigned shareholders. If no direction is made, the
proxy will be voted FOR Item 1. An abstention is the equivalent of a vote
AGAINST the Proposed Amendment.
 
     Indicate your vote by an (X). The Board of Directors recommends voting FOR
Item 1.
 
ITEM 1.
 
     To remove from the Company's Articles of Incorporation, as amended, (i)
Subparagraph (F)(b) of Paragraph FOURTH under "General Provisions" of the
"Preferred Stock" section, a provision restricting the amount of securities
representing unsecured indebtedness issuable by the Company, (ii) Subparagraph
(F)(a) of Paragraph FOURTH under "General Provisions" of the "Preferred Stock"
section, a provision which requires the vote of the holders of at least a
majority of the total voting power of the Company's outstanding preferred stock
to approve the sale of all or substantially all of the Company's property and
mergers or consolidations that have not been approved under the Public Utility
Holding Company Act of 1935, as amended, and (iii) Subparagraph (F)(b) (except
the first paragraph therein) of Paragraph FOURTH under "General Provisions" of
the "Preferred Stock" section, a provision restricting the ability of the
Company to pay dividends on its common stock in the event that its common equity
capitalization falls below certain levels.
 
            [ ]  FOR            [ ]  AGAINST            [ ]  ABSTAIN
 
     SHARES REPRESENTED BY ALL PROPERLY EXECUTED PROXIES WILL BE VOTED IN
ACCORDANCE WITH INSTRUCTIONS APPEARING ON THIS PROXY. IN THE ABSENCE OF SPECIFIC
INSTRUCTIONS, PROXIES WILL BE VOTED IN ACCORDANCE WITH THE RECOMMENDATIONS OF
THE BOARD OF DIRECTORS, AND IN THE DISCRETION OF THE PROXY HOLDERS AS TO ANY
OTHER MATTERS THAT MAY PROPERLY COME BEFORE THE SPECIAL MEETING.
 
<TABLE>
<CAPTION>
  CUSIP #                Series             FOR                AGAINST            ABSTAIN
  <S>                    <C>                <C>                <C>                <C>
  605417203              4.40%
  605417302              4.60%
  605417401              4.72%
  605417831              6.32%
  605417815              6.65%
  605417500              7.00%
</TABLE>
 
NOTICE: THE ABOVE BANK OR BROKER HEREBY CERTIFIES THAT IT HAS NOT GIVEN AND WILL
NOT GIVE INSTRUCTIONS TO TENDER ANY SHARES LISTED ABOVE THROUGH THE DTC ATOP
SYSTEM.
 
ATTENTION ALL DTC PARTICIPANTS: PLEASE USE THIS PROXY FORM FOR VOTING ON ANY AND
ALL ISSUES. DO NOT USE THE BENEFICIAL OWNER PROXY FORM.
 
<TABLE>
<S>                                                    <C>
Date:
     ----------------------------------------------
 
DTC Participant Name:                                  Authorized Signature:
                      -----------------------------                            --------------------------
 
DTC Participant Number:                                Print Name:
                         --------------------------               ---------------------------------------
 
Name of Firm:                                          Telephone Number:                                   
               ------------------------------------                     ---------------------------------
 
Address:
         ------------------------------------------
 
         ------------------------------------------
Medallion Stamp:
</TABLE>

<PAGE>   1


                              TROUTMAN SANDERS LLP
                     600 PEACHTREE STREET, N.E., SUITE 5200
                          ATLANTA, GEORGIA 30308-2216
                                 (404) 885-3900

                                November 3, 1997

The Southern Company
270 Peachtree Street, N.W.
Atlanta, Georgia  30303

         Re:  Offer to Purchase and Proxy Statement

Ladies and Gentlemen:

         We are acting as counsel to The Southern Company in connection with
the preparation of a Schedule 13E-4 (the "13E-4"), including an Offer to
Purchase and Proxy Statement, filed with the Securities and Exchange Commission
on November 3, 1997 (the "Offer to Purchase and Proxy Statement").

         We hereby confirm our opinion that the statements as to matters of law
and legal conclusions set forth under the caption "Certain Federal Income Tax
Consequences" in the Offer to Purchase and Proxy Statement are correct in all
material respects.

         We hereby consent to the filing of this opinion with the Commission as
an exhibit to the 13E-4 and to the use of our name under the heading "Certain
Federal Income Tax Consequences" in the Offer to Purchase and Proxy Statement.

                                                  Very truly yours,

                                                  /s/ Troutman Sanders LLP
                                                  ------------------------      
                                                      TROUTMAN SANDERS LLP




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