Critical Path Launches Hosted Messaging Services for T-Mobile; Hosted Platform Now Providing Mobile Data Services for Subscribers in Germany, United Kingdom and Austria.

Business Editors/High-Tech Writers

SAN FRANCISCO--(BUSINESS WIRE)--Nov. 19, 2003

Critical Path, Inc. (Nasdaq:CPTH), a global leader in digital communications software and services, today announced that its Critical Path Hosted Messaging Service is now delivering mobile data services for T-Mobile, one of the world's leading mobile telecommunications companies. The Critical Path service is providing multi-channel access to email, SMS, address books, calendar entries and other services from smart phones, wireless PDAs and other devices, Web browsers and desktop clients such as Microsoft(R) Outlook(TM). T-Mobile is offering these data services to subscribers in Germany, the United Kingdom, and Austria.

"Critical Path's Hosted Messaging Service enables carriers to rapidly bring new, differentiated services to market that drive mobile data traffic and generate new revenue," said Michael Serbinis, chief technology officer at Critical Path. "Our hosted service combines the breadth and scalability of Critical Path Communications Platform with the years of expertise that we have developed as the pioneer in delivering hosted messaging solutions."

For more information on Critical Path's messaging solutions for carriers and service providers, please visit www.criticalpath.net/solutions/wirelessSP/.

Forward-Looking Statements:

This press release contains forward-looking statements by the Company and its executives regarding the performance, security, scalability and interoperability of our product and service offerings, the ability of our customers to achieve cost savings in the provision of services, industry trends, market and customer requirements, the ability of our products and services to meet the business needs of our customers, the market for products and services like ours and the performance of our senior management in achieving strategic goals. The words and expressions "look forward to," "will," "expect," "plan," "believe," "seek," "strive for," "anticipate," hope," "estimate" and similar expressions are intended to identify the Company's forward-looking statements. These forward-looking statements involve a number of risks and uncertainties that could cause actual results to differ materially from those anticipated. These risks include, but are not limited to, our evolving business strategy and the emerging and changing nature of the market for our products and services, our ability to deliver on our sales objectives, the ability of our technology and our competitors' technologies to address customer demands, changes in economic and market conditions, unplanned system interruptions and capacity constraints, software and service design defects. These and other risks and uncertainties are described in more detail in the Company's filings with the U.S. Securities and Exchange Commission (www.sec.gov) made from time to time, including Critical Path's Annual Report on Form 10-K for the fiscal year ended December 31, 2002,and Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, June 30 and September 30, 2003, as may be amended from time to time, and all subsequent filings with the Securities and Exchange Commission (www.sec.gov). The company makes no commitment to revise or update any forward-looking statements in order to reflect events or circumstances after the date any such statement is made.

Note to Editors: Critical Path and the Critical Path logo are the trademarks of Critical Path, Inc. All other trademarks are the property of their holders.