Critical Path and Pitney Bowes Join Forces Adding Increased Functionality to iSend Service.

STAMFORD, Conn. and SAN FRANCISCO--(BUSINESS WIRE)--Oct. 6, 1999--

iSend(TM) On-line Document Delivery now to include

secure messaging from within existing e-mail systems

Critical Path, Inc. (NASDAQ:CPTH), the leading provider of business-to-business Internet messaging solutions for corporations, Internet service providers (ISPs), Web hosting companies, and Web portals, today announced an agreement with Pitney Bowes, Inc. (NYSE:PBI), the world leader in mail and messaging technology.

Pitney Bowes will utilize Critical Path technology to bring the power of the iSend(TM) On-line Document Delivery Service to the LAN e-mail desktop. This increased functionality represents a significant step forward in Pitney Bowes' electronic messaging service, and it exemplifies Critical Path's technology leadership in the advanced messaging market.

Through this relationship, business users will be to access iSend directly from within existing desktop e-mail clients, including MS Exchange, OutLook, Lotus Notes, Novell GroupWise, MS Mail, Lotus cc:Mail, POP3, and IMAP4 systems to send secure, trackable messages. Previously, business professionals and individuals needed to access iSend through a special account accessible via any standard Web browser.

"The need for secure, private and trackable e-mail services grows everyday as business users and individuals use e-mail more frequently to send time-sensitive communications," said Doug Hickey, Critical Path's president and CEO. "Critical Path is dedicated to providing the most robust and comprehensive solutions to meet the broad range of messaging needs of our customers. With Pitney Bowes' secure messaging technology and Critical Path's advanced e-mail system integration capabilities, iSend users can now realize an unbeatable combination in terms of both security and ease-of-use."

"With iSend, Pitney Bowes has established an important new standard in secure, on-line document delivery services," said Judy Martin, Vice President Strategic Marketing, Pitney Bowes. "For the first time, e-mail users will be able to send truly secure messages directly from within their existing desktop e-mail client. iSend users will certainly benefit from the increased functionality and flexibility that Critical Path's technology brings, and we'll continue to develop cutting-edge solutions that make all forms of messaging easier for our customers."

The iSend(TM) System - at www.isend.com - is a new Internet-based service that combines the best of e-mail with the best of overnight delivery. iSend enables businesses to securely send and track the electronic delivery of any file to anyone with access to the Internet. It's quicker than a messenger, less expensive than overnight express, available around the clock and it's totally secure.

-- Reliable Delivery. iSend combines the availability of e-mail with the more robust file transfer capabilities of the web to greatly increase the reliability of on-line file delivery.

-- Universal delivery. iSend message recipients require no special software or proprietary protocols. Anyone with e-mail and web access can use iSend to send and receive deliveries. In addition, iSend integrates Adobe(R) Acrobat(R) Software to automatically convert files into a Portable Document Format (PDF), so the document can easily be viewed regardless of shared applications between the sender and recipient. Everything from word-processing documents, to graphics, to legal contracts and even multimedia files can be delivered quickly and easily.

-- Secure delivery. Unlike regular e-mail, sensitive information is controlled and protected through the iSend System's point-to-point security - including robust encryption, authentication and recipient password protection. iSend can also defend vulnerable e-mail programs from document damage and theft.

-- Controlled delivery. iSend has sophisticated tracking features, giving senders end-to-end visibility as to the progress of their file delivery.

About Pitney Bowes, Inc.

Pitney Bowes is a $4.2 billion premier provider of informed mail and messaging management. For more information on iSend or other Pitney Bowes messaging solutions, please visit the company's web site at www.pitneybowes.com.

About Critical Path, Inc.

Critical Path, Inc. (NASDAQ:CPTH) is a leading provider of business-to-business Internet messaging solutions for corporations, Internet service providers (ISPs), Web hosting companies, and Web portals. Critical Path has built an industry-leading global infrastructure with data centers connected to key Internet exchange points, and currently reaches millions of end-users through its customer relationships. Critical Path provides reliable, secure, and scalable e-mail, and a flexible suite of enhanced messaging services to partners such as E

RADE, CompuServe, Network Solutions, U S West,
Sprint, and ICQ. Critical Path is headquartered in San Francisco,
California, with offices in locations nationwide and in Germany and
the UK. More information on Critical Path can be found at www.cp.net.

     Note to Editors: Critical Path is a service mark and the Critical
Path logo is a trademark of Critical Path, Inc.
     The statements in this press release relating to matters that are
not historical are forward-looking statements. Actual results could
differ materially from these forward-looking statements. Risks and
uncertainties facing Critical Path are described in its prospectus
dated June 1, 1999 and with its periodic filings with the Securities
and Exchange Commission (www.sec.gov).