==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
======== Required information ====
- iRedMail version: 1.9.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Apache
- Linux/BSD distribution name and version: Ubuntu 14.04.2 LTS (GNU/Linux 3.13.0-44-generic x86_64)
- Related log if you're reporting an issue:
====

I have a question about the size and amount of stored emails shown in the dashboard (under system information).
It appears that we have about 10000 stored emails ~ 1.36GB, however going into the mail accounts only 10% of that amount of emails can be seen (number of messages at the bottom in roundcube).

I'm guessing the 90% is just spam that gets stored, now my question is, does that 90% ever get deleted? What is the expiration period? Otherwise I can see the server filing the HDD in a couple of weeks...