I have been having a weird problem with Zimbra(7.1.4_GA_2555.DEBIAN5) lately:

On the (web)control panel the status keep changing to red every few days. When this is happens the output of zmcontrol status still shows running: antispam Running antivirus Running imapproxy Running ldap Running logger Running mailbox Running memcached Running mta Running snmp Running spell Running stats Running zmconfigd Running

Every thing runs fine except automated mail forwarding from one account to another(which is critical for us).

I have been through Zimbra forums and the following ALWAYS fixes the issue:

su - zimbra -c "zmprov mcf zimbraLogHostname mail.mydomain.com"

/opt/zimbra/libexec/zmsyslogsetup

/etc/init.d/rsyslog restart

su - zimbra -c "zmcontrol restart"

After I run the above commands, the status on control panel turns green and mail forwarding starts to work again BUT only for a few days.

Other than the above, everything works fine including Server statistics.

Anyone seen this issue before?