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About Rockliffe: Rockliffe was established in 1995 and is based in California's Silicon Valley with European headquarters in the UK. Rockliffe MailSite email server software and MailSite MP email gateways provide secure email server solutions and gateway email protection for more than 2,000 businesses and service providers hosting more than 15 million mailboxes worldwide. These include service providers such as Active24, Buckeye Cablevision, CommunityISP, eChalk, OneBox, MCI, and WestNet, and businesses such as Amersham Biosciences, Encyclopædia Britannica, and MediaNews Group.