Please point me where can i start to investigate what causing zmmailboxdctl is not running.
Mail server is working and all of a sudden it will stop sending and receiving mail.
Running zmcontrol stop and start fix the problem but i want to know what causing this issue to fully resolved.
What files and configuration need to be checked?

[zimbra@ root]$ zmcontrol status
Host fqdn.com
antispam Running
antivirus Running
ldap Running
logger Running
mailbox Stopped
zmmailboxdctl is not running.
mta Running
snmp Running
spell Running
stats Running
zmconfigd Running

Best Regards