ROCKLIFFE ANNOUNCES EASY UPGRADE PATH FOR POST.OFFICE CUSTOMERS

Free Tools Provide Sites Running Post.Office With An Easy Migration To Rockliffe MailSite

Campbell, Calif., (April 15th, 2002) - Rockliffe, Inc. a developer of e-mail and messaging infrastructure software for service providers and corporations today announced an easy and comprehensive migration program for customers of Post.Office, a discontinued messaging server.

Rockliffe's new migration tools make it easy for customers to migrate their user accounts and message store from Post.Office to any MailSite package. Most importantly, Rockliffe has made it possible for customers to migrate passwords from Post.Office so that subscribers can continue to send and receive e-mail with the absolute minimum downtime or support intervention. Depending on the size of the site, customers should be able to make the switch within a couple of hours.

"With our easy migration path, we are inviting customers running Post.Office to experience Rockliffe's leading-edge software and world-class support for themselves," said Rockliffe President and CEO John Davies. "We look forward to helping these customers upgrade to Rockliffe MailSite and benefit from its comprehensive leading-edge features such as content filtering, anti-spam, anti-virus, web messaging and wireless messaging."

Rockliffe MailSite offers unmatched scalability, reliability and performance for companies hosting e-mail services on Windows 2000. Rockliffe MailSite LE can support over 10,000 mailboxes on a single server and Rockliffe MailSite SP can support over 1 million mailboxes on a cluster of servers. Rockliffe MailSite includes extensive anti-spam and content filtering capabilities, an integrated list server, and delegated administration. Rockliffe MailSite comes bundled with MailSite Express, a web-messaging client that supports 19 languages, as well as MailSite Pocket, a wireless messaging client for WAP devices. Prices for Rockliffe MailSite LE start at $1,995 and prices for Rockliffe MailSite SP start at $4,995.

About Rockliffe

Rockliffe is a leading developer of scalable messaging and e-mail infrastructure software for service providers, telecom companies and enterprises. Rockliffe was established in 1995 and is based in California's Silicon Valley with European headquarters in Leeds, UK. Rockliffe has more than 3,000 customers hosting more than 15 million mailboxes worldwide. These include leading hosting providers such as Digex, Intel and ActiveISP, unified messaging providers such as Call Sciences, and large enterprises including AT&T, Boeing, Cambridge University, and UK government departments. In April 2001, Rockliffe announced a strategic relationship with Compaq Computer Corporation to jointly develop and market Rockliffe MailSite for the Compaq NonStop Himalaya platform.

Rockliffe, MailSite, and Rock-Solid Software are registered trademarks of Rockliffe Systems, Inc. All other registered names and trademarks are the property of their respective owners.