How do i back up and restore an iRedMail server (mysql)?

I have a good, a and perfectly working iRedMail server.

I want to start a cron job to automatically execute a backup script i'm writing that will push it to my backup server.

Except the mysql dump, do i need anything else?

==== Required information ====
- iRedMail version: 0.8.4
- Store mail accounts in which backend (MySQL):
- Linux/BSD distribution name and version: Ubuntu 12.04
- Related log if you're reporting an issue:
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