STAMPS.COM FIRST QUARTER 2006 FINANCIAL RESULTS CALL INVITAIONn

This is an invitation to join the Stamps.com First Quarter 2006 Financial Results Conference Call. The call will take place Tuesday, April 25, 2006 at 2:00 pm ET and will be web cast from our Investor Relations Web site at http://investor.stamps.com. The first quarter 2006 earnings press release will precede the earnings call at 8 am ET on April 25, 2006.

If you have any questions, please call Stamps.com Investor Relations at (310) 482-5830 or e-mail us at [email protected].

We look forward to your participation.

This message is not an offer to sell securities and is not soliciting an offer to buy securities.

About Stamps.com and PhotoStamps

Stamps.com Inc. (Nasdaq: STMP) is a leading provider of Internet-based postage services. Stamps.com enables small businesses, enterprises, and consumers to print U.S. Postal Service-approved postage with just a PC, printer and Internet connection, right from their home or office. 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.

PhotoStamps is a patented Stamps.com product that couples the technology of PC Postage with the simplicity of a web-based image upload and order process. From May to December 2005, over 10 million individual PhotoStamps were shipped to customers. PhotoStamps was recently named one of the “Best Product of 2005” by BusinessWeek.

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995: This release includes forward-looking statements about our anticipated results and available products that involve risks and uncertainties. Important factors, including the Company’s ability to complete and ship its products and obtain or maintain 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, 2004, Quarterly Reports on Form 10-Q, and 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 and PhotoStamps are trademarks or registered trademarks of Stamps.com Inc. All other brands and names are property of their respective owners.

Stamps.com Investor Contact:
Jamie Harper
Investor Relations
(310) 482-5830
http://investor.stamps.com

Press Contact:
Dena Cook
Zeno Group
(310) 566-2283
[email protected]