The high level Managed E-Mail Service is provided on a physical server running the CentOS operating system. Each server provides a single client's e-mail & web hosting service and is dedicated to that single client.  Each of the servers are configured with at least 1TB of HHD space (more redundant RAID1 mirrored setup with a hot spare) and up to 2TB of HHD space if needed (less redundant RAID5 parity setup with no hot spare).  All HDD space is shared between website data and mailbox data.