Postfix relaying mail to internal mail server
 

All,

I have an Exchange server running inside our network, exchange.mydomain.local at 192.168.168.3 I am trying to set up Postfix to accept mail bound for mydomain.com and relay / forward it to the exchange server. It will accept mydomain.com email but it tries to deliver it locally.

I added "mydomain.com smtp:[192.168.168.3]" to /etc/postfix/transport and ran postmap transport. I cant seem to figure out what changes to main.cf I need to stop mydomain.com mail from being delivered locally on the Postfix box.

Any suggestions?

Thanks,

Chris

Hmm, according to my Postfix book you should just need:

an entry in /etc/postfix/transport
mydomain.com smtp:192.168.168.3

entry in /etc/postfix/main.cf
transport_maps = hash:/etc/postfix/transport

then I believe you need to run
postmap /etc/postfix/transport

One other thing I came across, you may want to set
default_transport = smtp

which should force Postfix to try SMTP delivery for anything not defined explicitly (this should defeat implicit local delivery).

WARNING: I have NOT tested ANY of the above. I'm just interpreting information from Postfix by Richard Blum, published by Sams.

Thanks chort......adding the

transport_maps = hash:/etc/postfix/transport

fixed the issue.

Thanks for your quick reply.

--Chris