LIMITED POWER OF ATTORNEY FOR
SECTION 16 REPORTING OBLIGATIONS

      Know all persons by these presents that the undersigned hereby makes, constitutes and
appoints Matt Lipson, Sara Kani, Juliet Stone and David M. Zlotchew as the undersigned's true
and lawful attorney-in-fact, each with full power and authority as hereinafter described on behalf
of and in the name, place and stead of the undersigned:

  (1)    to prepare, execute, acknowledge, deliver and file Forms 3, 4, and 5 (including
    any amendments thereto) with respect to the securities of Stamps.com Inc., a
    Delaware corporation (the "Company"), with the United States Securities and
    Exchange Commission (the "SEC"), any national securities exchanges and the
    Company, as considered necessary or advisable under Section 16(a) of the
    Securities Exchange Act of 1934 and the rules and regulations promulgated
    thereunder, as amended from time to time (the "Exchange Act");

  (2)    to prepare, execute, acknowledge, deliver and file Form ID (including any
    amendments thereto) with the SEC in order to apply for EDGAR access codes
    on the undersigned's behalf, and to generate new and/or replacement EDGAR
    access codes, to reset the EDGAR passphrase and take any other action
    considered necessary or advisable with respect to the undersigned's access to
    the undersigned's status as an electronic filer with respect to the SEC's EDGAR
    system;

  (3)    to seek or obtain, as the undersigned's representative and on the undersigned's
    behalf, information on transactions in the Company's securities from any third
    party, including brokers, employee benefit plan administrators and trustees, and
    the undersigned hereby authorizes any such person to release any such
    information to the undersigned and approves and ratifies any such release of
    information; and

  (4)    to perform any and all other acts which in the discretion of such attorney-in-fact
    are necessary or desirable for and on behalf of the undersigned in connection
    with the foregoing.

       The undersigned acknowledges that:

  (A)    this Power of Attorney authorizes, but does not require, such attorney-in-fact to
    act in its discretion on information provided to such attorney-in-fact without
    independent verification of such information;

  (B)    any documents prepared and/or executed by any such attorney-in-fact on behalf
    of the undersigned pursuant to this Power of Attorney will be in such form and
    will contain such information and disclosure as such attorney-in-fact, in his or
    her discretion, deems necessary or desirable;

  (C)    neither the Company nor such attorney-in-fact assumes (i) any liability for the
    undersigned's responsibility to comply with the requirement of the Exchange
    Act, (ii) any liability of the undersigned for any failure to comply with such
    requirements, or (iii) any obligation or liability of the undersigned for profit
    disgorgement under Section 16(b) of the Exchange Act; and

  (D)    this Power of Attorney does not relieve the undersigned from responsibility for
    compliance with the undersigned's obligations under the Exchange Act,
    including without limitation the reporting requirements under Section 16 of the
    Exchange Act.

      The undersigned hereby gives and grants each foregoing attorney-in-fact full power and
authority to do and perform all and every act and thing whatsoever requisite, necessary or
appropriate to be done in and about the foregoing matters as fully to all intents and purposes as
the undersigned might or could do if present, hereby ratifying all that such attorney-in-fact, of,
for and on behalf of the undersigned, shall lawfully do or cause to be done by virtue of this
Limited Power of Attorney.

      This Power of Attorney shall remain in full force and effect until revoked by the
undersigned in a signed writing delivered to such attorney-in-fact.


        [Signature page follows immediately.]



      IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 1st day of August, 2018.


                /s/ Katie May
                Signature


                Katie May
                Print Name