Earlier today there was an outage when one of the disks in suith.hosteverything.net developed a fault, and had to be rebuilt. No data was lost in the process, but the server had to remain off-line during the rebuild (which takes around 3.5 hours to run).
The server is now back up. All undelivered mail has been queued on our backup mail servers and will start to find it's way into your account in the next hour.
Sorry for any inconveience caused in this outage.