==== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: Debian 7
- Related log if you're reporting an issue:
I use iRedMail as a spamgateway, behind I have a MS Exchange Server.
Now I have to power-off the MS Exchange Server for 3 or 4 days.
Where can I find the settings to keep the mails in iRedMail for more then 3 days?