[GRAPHIC OMITTED]                                            PLEASE VOTE NOW!


                       MFS GLOBAL TELECOMMUNCIATIONS FUND

                         a series of MFS Series Trust I

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            SPECIAL MEETING OF SHAREHOLDERS TO BE HELD JULY 28, 2003

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                      500 Boylston Street, Boston, MA 02116

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Dear Shareholder:

Recently  we  sent  you  proxy  material   regarding  the  Special   Meeting  of
Shareholders  for the MFS Global  Telecommunications  Fund to take place on July
28, 2003. The Fund's  records  indicated that we had not received your important
vote.  We urge you to act  promptly in order to allow us to obtain a  sufficient
number of votes to hold the Meeting as scheduled and avoid the possibility of an
adjournment.

EVERY VOTE COUNTS

A shareholder may think his or her vote is not important,  but it is vital. Your
vote is critical to enable your Fund to hold the meeting as scheduled, so please
vote immediately.  Any additional  solicitations  will cost your Fund additional
money. We urge you to vote your proxy now. You and all other  shareholders  will
benefit from your cooperation.

After  careful  review,  the  Global  Telecommunications  Fund's  Trustees  have
unanimously   recommend  a  vote  "FOR"  the  proposed  Agreement  and  Plan  of
Reorganization  as detailed in your proxy  statement.  Please refer to the proxy
statement  previously  mailed to you. If you have any  questions  regarding  the
meeting agenda or the execution of your proxy, please call Georgeson Shareholder
(toll-free) at 1-866-364-3351 extension MFS626.

For  your  convenience,  we have  established  three  easy  methods  by which to
register your vote:

     1.   By  Touch-tone Phone:  Call  1-800-690-6903  and  follow  the  simple
                                 instructions.  Please make sure you have your
                                 proxy card  available at the time of the call.

     2.   By Internet:           Visit  www.proxyvote.com, and enter the control
                                 number located on your proxy card.

     3.   By Mail:               Execute your proxy and return it in the
                                 enclosed postage paid envelope immediately.





                                  SCHEDULE 14A

PROXY STATEMENT PURSUANT TO SECTION 14(A) OF THE SECURITIES EXCHANGE ACT OF 1934

Filed by the Registrant [ X ]
Filed by a party other than the Registrant
Check the appropriate box:  [   ] Preliminary Proxy Statement
                            [   ] Confidential for Use of the Commission
                                   Only (as permitted by Rule 14a-6(e)(2))
                            [   ] Definitive Proxy Statement
                            [ X ] Definitive Additional Materials
                            [   ] Soliciting Material Pursuant to Rule 14a-11(c)
                                   or Rule 14a-12

MFS(R)Series Trust I (File No. 333-104735) on behalf of MFS(R)Technology Fund;
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                (Name of Registrant as Specified in its Charter)

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                   (Name of Person(s) Filing Proxy Statement)

Payment of Filing Fee (Check the appropriate box):
       [ X ] No fee required

       [   ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and
              0-11.

       (1)   Title of each class of securities to which transaction applies:

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       (2)   Aggregate number of securities to which transaction applies:

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       (3)   Per unit price or other underlying value of transaction computed
             pursuant to Exchange  Act Rule 0-11 (Set forth the amount on which
             the filing fee is calculated and state how it was determined):

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       (4)   Proposed maximum aggregate value of transaction:

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       (5)   Total Fee Paid:

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       [ ]   Fee paid previously with preliminary materials.

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

       (1)   Amount previously paid:

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       (2)   Form, Schedule or Registration Statement No.:

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       (3)   Filing Party:

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       (4)   Date Filed:

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                                [GRAPHIC OMITTED]

                            MFS INVESTMENT MANAGEMENT

              500 BOYLSTON STREET, BOSTON, MASSACHUSETTS 02116-3741

                                 (617) 954-5000



                                        July 14, 2003


VIA EDGAR
Securities and Exchange Commission
Division of Investment Management
Judiciary Plaza
450 Fifth Street, N.W.
Washington, DC  20549

     Re:  MFS(R)  Series  Trust I (File  No.  333-104735)  on  behalf  of MFS(R)
          Technology Fund

Ladies and Gentlemen:

     On behalf of MFS Series Trust I (the "Trust"),  enclosed  herewith pursuant
to rule  20a-1  under the  Investment  Company  Act of 1940,  as  amended,  Rule
14a-6(b) under the Securities Exchange Act of 1934, as amended (the "1934 Act"),
and Rule 101 of Regulation ST is a definitive copy of an additional solicitation
material   mailed   to   shareholders   with   respect   to   the   MFS   Global
Telecommunications Fund's Special Meeting of Shareholders to be held on July 28,
2003, relating to the acquisition of the assets of MFS Global Telecommunications
Fund,  a series of MFS  Series  Trust I, by and in  exchange  for  shares of MFS
Technology Fund, also a series of the Trust.

     If you have any questions,  please do not hesitate to call the  undersigned
at (617) 954-5047.

                                        Sincerely,



                                        JAMES F. DESMARAIS
                                        James F. DesMarais
                                        Assistant General Counsel

JFD/bjn
Enclosures