Qmail Mail back up

sir,

I have installed qmail+vpomail+qmailadmin in my redhat linux 9.1, last month i had problem that my system was got crashed, but i recovered almost all the data i had in that harddisk, but i did'nt know how to take the back up my mail that i have it in my server, as i have got more that 500 user in it, most user don't keep data in the server they download it very frequently using outlook & other services, so i had less Complaints of mail data loss, But in future i don't wnt to do the same mistake. And i want to keep the backup of the mail regularly on weekly bases.

So plz tell me the way to take the backup of mail regularly so that i dn't encounter this problem again. i know with RAID i can solve this problem , apart from that is there any other solution.

thanks

All I'm doing is daily backups of /home/vpopmail/domains/* but if you want to recover from a crash and be EXACTLY where you left off before the crash, you'll have to look at RAID.