Re: Sugesstions building a rather big mail system.
Backups are not so usefully for an email systems because of heavy traffic
IMHO. The best backup solution is to use an RAID1 array for storing the mails
and system files.
Another good procedure (IMHO) is to use proxy's for SMTP and POP3 and store
the emails on different machines. Example: accounts from A-G on machine 1,H-L
on machine 2 etc ... If you want to have central storage for email you could
use a central SAN solution. Those have redundant disk arrays but are much