Stamps.com New Version 4.0 Dramatically Improves Customer Misprint Experience

SANTA MONICA, Calif – May 27, 2004 – Stamps.com® (Nasdaq: STMP – News), the leading PC Postage® provider, today announced the release of Stamps.com Version 4.0. The new version provides customers with a dramatically improved experience for handling postage printing problems. Version 4.0 also improves the usability of NetStamps™, adds email notification capabilities, and broadens the availability of Stamps.com insurance.

“The advancements in version 4.0 around misprinted postage represent a big leap forward in solving one of our largest remaining customer issues,” said Ken McBride, CEO of Stamps.com. “We expect this change to be well received by our customers.”

With new version 4.0, following a printing problem customers can now immediately reprint postage for all packages and envelopes. In addition, customer can easily request paperless electronic postage refunds (e/Refunds) directly through the Stamps.com product. Before version 4.0, customers were unable to reprint misprinted postage, and customers had to submit forms and physical evidence to receive credit for misprinted postage.

Version 4.0 also adds the following new capabilities:

• Multi-Value NetStamps. Customers can now print a single sheet of NetStamps labels with mixed postage values in a single print run.
• Automated Email Notification. Customers can now automatically send email to their recipients when a package is shipped and receive email delivery notification once that same shipment is delivered.
• Insurance for any USPS Mailpiece. Customers can now purchase Stamps.com insurance for any mailpiece, including items using NetStamps or other forms of valid USPS postage. Previously, Stamps.com Insurance was available for a more limited set of Stamps.com postage features.
• QuickBooks Address Book Support. Customers can now access contact lists directly from QuickBooks Pro 2004 via the Stamps.com address book.

Stamps.com Version 4.0 is available now at www.stamps.com.

About Stamps.com

Stamps.com (Nasdaq: STMP) is a leading provider of Internet–based postage services. Stamps.com enables customers to print U.S. Postal Service–approved postage with just a PC, printer and Internet connection. The Company targets its services to small businesses and home offices, and currently has partnerships with companies including Microsoft, CompUSA, EarthLink, HP, NCR, Office Depot, Vendio and the U.S. Postal Service.

“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, including the Company’s ability to complete its products and obtain regulatory approval, 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 for the fiscal year ended December 31, 2002, its subsequent Quarterly Reports on Form 10–Q, and its Current Reports on Form 8–K. 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, the Stamps.com logo, NetStamps and Hidden Postage are trademarks or registered trademarks of Stamps.com Inc. All other brands and names are property of their respective owners.

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