How to configure internal zimbra mta and external zimbra mta

[danny.sierra@omtech.net]

Hi Guys,


i want to build a zimbra architecture where i can have one or two zimbra mta servers on the border so they can send and recieve external mail and inside my LAN behind a firewall one or two mta severs only for internal mail, is easy to installa them on a multiserver install but my question is how can i confgure zimbra to understand that y first mtas are for external and my second mta are for external.

i'll appreciatte any help,