What do I do when my Message Server is nearing full disk capacity?

Solution

The most common cause of a mailstore filling up is that email to the administrator account is taking up all available space.

To prevent this:

Establish a process for dealing with the administrator mailbox, either forwarding the mail off the Mirapoint appliance or regularly reading and removing the mail.
Pay particular attention to the membership of the daily-reports, system-alerts, and postmaster distribution lists (DLs), which can receive large amounts of traffic. The daily SMTP logs sent to the daily-reports DL can be extremely large on busy appliances.