BLACKSBURG, Va., Sep 02, 2008 (BUSINESS WIRE) — Mailtrust(TM), a leading business-class email specialist and a division of Rackspace(R) Hosting (RAX) today announced that their 450-plus resellers will be able to offer their customers Hosted Exchange 2007. Previously, resellers could only offer Managed Exchange 2003 or Noteworthy(R), Mailtrust’s premier web-based business-class email platform.