Seeing this in the syslog messages whenever I send a test message.
Dec 1 07:39:00 OMV postfix/error[18125]: A76226227E: to=<my_address@gmail.com>, relay=none, delay=332230, delays=331629/601/0/0.1, dsn=4.4.2, status=deferred (delivery temporarily suspended: conversation with smtp.gmail.com[64.233.160.108] timed out while receiving the initial server greeting)
Checked the firewall and there are no blocks/drops associated with OMV. Any 'gotchas' with getting this working?