==== Required information ====
- iRedMail version: 0.9.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Linux/BSD distribution name and version: Ubuntu 14.04.2
- Related log if you're reporting an issue:
====
Some email accounts are receiving successful mail delivery report after each email....
is there any way to stop this for this accounts?