Due to some other problems, I had to change my Zimbra install to be behind a NAT.
I had split DNS setup before, so I :
Checked Split-DNS verify section, hostnames, etc.
All looks fine. MyNetworks had LAN range in already, so no change there.
Reboot, now cannot even log in with Thunderbird, says connection refused.
Also zmmailboxdctl is not running.
and if I do someting like:
zmprov getServer zimbra.example.com | grep zimbraMtaMyNetworks
[D INFO: I/O exception (java.net.ConnectException) caught when processing request: Connection refused
 INFO: Retrying request
ERROR: zclient.IO_ERROR (invoke Connection refused, server: localhost) (cause: java.net.ConnectException Connection refused)
Now serevr is basically useless... I tried to rebuild MySQL tables, re-installed('upgrade') Zimbra, but same issue.
Any help would be great.