hai guys any one know how to backup & restore mail of different users in the squirrelmai iam using squirrelmail on red hat enterprise version 9 any sugestions deeeply appreciated
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Cool you must be a time traveler using redhat enterprise 9 when the latest release is 4 maybe you mean redhat 9 anyway squirrelmail uses imap how you backup and restore mail will depend on what is on the other end of your imap server most likely its just flat files.

< gasp for breath >

Whoa, take it easy there!

As sednet says, Squirelmail generally just connects to a mail server like any other mail client. The files you want to back up are in users' home directories, probably under Mail/ or similar, and their spool files, /var/spool/mail/username . Those paths could be wrong, I'm not a RH expert, but that's the idea (as far as I know).