I've got a problem that has happened twice now. I come into work and the server doesn't send or receive mail, but I can log into the web interface.
/var/log/zimbra.log has this in it:
A "zmcontrol status" shows everything running. So to get it back up I just stop and start it, then everything is fine.
Apr 22 06:26:00 mail postfix/postqueue: fatal: Queue report unavailable - mail system is down
I googled a bit and took a look at my catalina.out in tomcat. There are some errors that have got to do with it. The log is attached.
Also every night I stop zimbra, backup, and then start it again.