I have a zimbra server running on Fedora, latest version etc, and I run another server along side of this zimbra server.
The zimbra server is running on mail.itas.ca, and the other server is running on titan.itas.ca. They are both on the same network etc, however, any mail from the other server does not get routed to zimbra accounts. It will route to external accounts (Gmail), but nothing gets to the zimbra server from that server.
I have tried the following:
Created a SMART_HOST in titan.itas.ca and pointed it at Zimbra (No Go)
Added the network to the Trust Networks on the MTA
Not really sure what else to try at this point, any ideas?