The base level Managed E-Mail Service is provided on a physical host server running the CentOS operating system with a modified OpenVZ kernel running on a 900GB RAID1 mirrored setup and providing up to 7 Virtual Private Servers (VPS).  Each of the 7 VPSs provide a single client's e-mail & web hosting service and is dedicated to that single client.  Each of the e-mail & web hosting client VPSs are running the CentOS operating system and are configured with 120GB of HHD space shared between website data and mailbox data.