Backing up E-mail

I am installing a new server because i had trouble with the old one with ssh and ftp, so i was wondering where is all of the mail stored, and how can I back it up?

I have ubuntu server 7.04 and used the perfect setup to configure it. Thanks.

P.S. is there anything else i should think about backing up besides the website?

 

If you want to restore all the data, user and passwords I recommand Falkos Moving ISPConfig instructions.

If you just want to backup web and email then check if you use mbox or maildir.

Maildir is included in each users web folder.
Mbox is in /var/spool/mail/

 

I have postfix in var/spool, but where would the mail be?

 

Nevermind, i've found it. Its under web1/user/

Thanks.

Just two more questions,

1. Does my mail client (e.g. roundcube) Make that or does postfix?

2. And is this mail interchangeable with say an exchange server.. Could i put that into an exchange server and be able to read it?

Thanks!