On Fri, Dec 24, 2010 at 03:20:11PM -0600, Stan Hoeppner wrote:
> > I neglected to mention the exchange server, source outbound server,
> > is on internal edge of the dmz.
>
> Bah, you did mention the Exchange server and I just missed it. The 587
> is more geared toward MUAs like Outlook and TBird. If you just want to
> relay the mail from _only_ the Exchange server simply have, I think.
The OP likely failed to notice the multi-homed host documentation:
http://www.postfix.org/postconf.5.html#inet_interfaces
http://www.postfix.org/postconf.5.html#smtp_bind_address
--
Viktor.
