==== Required information ====
- iRedMail version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Linux/BSD distribution name and version:
- Related log if you're reporting an issue:
==== ==== Required information ====
- iRedMail version: 1.4.0
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  mysql
- Linux/BSD distribution name and version:  debian
====

sometimes comes to my email address 2.
it happens to all addresses but randomly.
Sometimes it works well, sometimes mail goes 2x

Previously, it worked correctly.
Where may be wrong?