Internal Exchange ===> Outgoing Smarthost ====> Postfix Forwarder the answer?

[turbogizzmo]

I have a internal Exchange server on a different subnet that needs to send emails out a different gateway. Exchange is picky about the number of NICs and routing changes so I wondered if sending via a smart host would be the cleaner answer and if thats something the Postfix package can achieve?

If so are there some basic setup steps, if its not the answer any other suggestions?

Exchange server on 172.16.0.0 needs to send out gateway on a 10.0.0.0 subnet…....

PS Incoming email is working fine

[doktornotor]

=> https://social.technet.microsoft.com/Forums/

[turbogizzmo]

Cute, ok, i will try to craft a better pfsense based question. Thanks

[mwp821]

@turbogizzmo:

I have a internal Exchange server on a different subnet that needs to send emails out a different gateway. Exchange is picky about the number of NICs and routing changes so I wondered if sending via a smart host would be the cleaner answer and if thats something the Postfix package can achieve?

Yes, it's possible to set up the Postfix Forwarder as a smart host. After setting it up to relay outbound mail through your provider, you essentially need to tell Postfix to permit SMTP mail relay from your trusted internal host (the Exchange server). The easiest way to do that it so add your local subnet(s) (e.g. 172.16.0.0/16) or specific IP addresses (e.g. 172.16.0.1/32) to mynetworks.

Here's my full solution for pfSense 2.2 from another thread. Hope that helps!