MASSACHUSETTS FINANCIAL SERVICES COMPANY
500 BOYLSTON STREET * BOSTON * MASSACHUSETTS
02116-3741
617 * 954-5000
April 4, 1995
VIA EDGAR
Securities and Exchange Commission
Judiciary Plaza
450 Fifth Street, N.W.
Washington, DC 20549
Re: MFS Managed Sectors Fund and MFS Cash Reserve Fund
(the Funds), series of MFS Series Trust I
(the Trust); File Nos. 33-7638 and 811-4777
Ladies and Gentlemen:
Pursuant to Rule 497(j) under the Securities Act
of 1933, as amended, please accept this letter as
certification that the prospectus and statement of
additional information for the Funds does not differ
from that contained in Post-Effective Amendment No. 20
(the Amendment) to the Trusts Registration
Statement on Form N-1A. This Amendment was filed
electronically on March 29, 1995.
Please call Anne Ciman at (617) 954-5406 or
(800) 343-2829, ext. 5406, with any questions you may
have.
Very truly yours,
JAMES F. DESMARAIS
James F. DesMarais
Assistant Secretary Pro Tempore
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