MailSite SP version 5.3 Ready for Customers

Performance improvements made and new features added

Campbell, CA - April 7, 2003- Rockliffe, Inc., a leading developer of email infrastructure software, today announced the immediate availability of MailSite SP version 5.3 for service providers and enterprises. MailSite's improved IMAP performance - up to five times faster than previous versions - means faster message access for the end-user. Fewer MailSite servers are required to handle the same number of users, which translates to easier administration and lower total cost of ownership. MailSite 5.3 also features improved Anti-virus performance that increases speed of processing and message throughput.

MailSite 5.3 offers better availability. Now, even if the SQL Server database goes offline for any reason, the MailSite services (POP, IMAP, and SMTP) keep running. This eliminates one more potential point of failure in MailSite SP systems. With greater deployment flexibility, MailSite SP clusters can be configured with individual MailSite servers handling specific roles (for example, inbound SMTP processing vs. outbound SMTP processing), or they can be configured as "clones" of each other, as before. MailSite SP can now use Active Directory for user authentication, as well as SQL Server.

"With improved IMAP and Anti-virus performance we are confident that this release creates even more value for our service provider customers," said John Davies, president and CEO. "Active Directory authentication now extends our MailSite SP clustering technology into large enterprises. MailSite is continually being improved to reflect the features our customers want."

About Rockliffe

Rockliffe is a leading developer of scalable email infrastructure software for enterprises and service providers. Established in 1995 and based in California's Silicon Valley with European headquarters in Leeds, UK, Rockliffe has three thousand customers with more than 15 million mailboxes licensed. Customers include leading ASPs such as Digex and Savvis, unified messaging providers such as Call Sciences, and large enterprises including AT&T and UK government departments. Rockliffe has a strategic partnership with Hewlett Packard that will deliver Rockliffe MailSite NS for the HP NonStop platform in 2003.

For further information visit http://www.rockliffe.com.

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.