STAMPS.COM ANNOUNCES INTEGRATION OF INTERNET POSTAGE INTO MICROSOFT WORKS 6.0 AND WORKS SUITE 2001

SANTA MONICA, Calif. – September 19, 2000 – Stamps.com(TM) (Nasdaq: STMP), the leading provider of Internet mailing and shipping services, and Microsoft Corp. (Nasdaq: MSFT) today announced Stamps.com’s Internet Postage(TM) service will be integrated into Microsoft Works 6.0 and Works Suite 2001. Users will be able to print postage from their computer to mail letters, cards, newsletters, and other Internet applications they create with Works.

Stamps.com will be featured in various locations within Works 6.0 and Works Suite 2001, including the Works task launcher. By clicking on the Internet Postage tab, users will be able to learn about the benefits and convenience of Internet postage, sign up for the service and print U.S. Postal service – approved postage the same day – right from their desktop. Stamps.com’s service is compatible with the Windows Address Book, the default address location for both versions of Works, and the Word mail merge application featured on Works Suite 2001, so customers may leverage their existing address book information to print postage onto envelopes and labels. Stamps.com also provides special services for customers, including tools for pricing, tracking, shipping packages and ordering supplies online, and is additionally offering Works Suite users a coupon for $30 free postage.

“Works was created to help individuals simplify and organize their household and lifestyle. In the same fashion, Stamps.com’s Internet Postage was created to save individuals, home offices and small businesses valuable time by eliminating trips to the post office” said Doug Walner, senior vice president and general manager, Small Business Unit at Stamps.com. “By integrating Stamps.com’s Internet Postage service with both versions of Works, we’re allowing users to print postage in order to mail all the documents they create – whether it be letters or invitations – in one easy step and right from their computer.”

“Microsoft is excited to offer consumers integrated, Internet postage from Stamps.com,” said Eric Doerr, program manager, home & retail division at Microsoft Corp. “Works 6.0 and Works Suite 2001 offer the tools necessary for home users to create all types of documents. With the addition of integrated postage from Stamps.com, home consumers can go from creation, to printing, to sending in a matter of moments.”

About Stamps.com

Stamps.com(TM) provides the easiest, smartest way to mail or ship letters, packages or parcels anywhere, anytime. Stamps.com operates three business units focused on providing valuable e-services allowing small businesses, large corporations and e-commerce companies to control costs and efficiently manage their mailing, shipping and returns operations. Its business is anchored in key relationships with the U.S. Postal Service and United Parcel Service (UPS) and other carriers, including FedEx, Airborne Express, DHL and Yellow Freight. Stamps.com’s subsidiary, EncrypTix Inc., leverages its highly secure, patented technologies enabling companies to provide value-bearing documents like tickets, coupons and certificates over the Internet to consumers. Stamps.com International will extend the company’s reach into foreign markets. Visit sdcmainprod.wpengine.com for more information.

About Microsoft

Microsoft, Windows, Outlook are either registered trademarks or trademarks of Microsoft Corp. in the United States and/or other countries.

The names of actual companies and products mentioned herein may be the trademarks of their respective owners.

###

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995: This release may contain forward-looking statements that involve risks and uncertainties. Important factors, which could cause actual results to differ materially from those in the forward-looking statements, are detailed in filings with the Securities and Exchange Commission made from time to time by Stamps.com, including its annual report on Form 10-K/A for the fiscal year ended December 31, 1999 and its quarterly report on Form10-Q for the fiscal quarter ended March 31, 2000. Stamps.com undertakes no obligation to release publicly any revisions to any forward-looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

Stamps.com, iShip, iReturn and the Stamps.com, iShip and iReturn logos are trademarks of Stamps.com Inc. All other brands and names are property of their respective owners.