Routing all email from a specific local source domain(we have multiples) to a specific remote host

Posted on 2011-09-14
Last Modified: 2012-05-12
We are running Exchange Server 2007

We have multiple domains so our primary smtp addresses look something like this for each mailbox/account:,,

We would like to be able to send all email for a particular local domain to a remote server/smart host.

So all mail sent from * on the local server is routed to some other server on a completely different network. I think the term is smart host?

This is not done through SMTP Send Connector as you cannot specify the local hosted source domain, only Address Space which specifies the destination.

I think what I am trying to do is called source based routing. I have been told that this was no longer possible in exchange 2007. Is there a way around this limitation?

Thanks in advance for any help!
Question by:GWSpectrum
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Expert Comment

ID: 36538673
I'm not sure what you are trying to do. However if you want to deliver mail locally and if the email address doesn't exist locally and instead of sending an email saying the recipient cannot be found forward it on to another email server,

To do the above simply change the accepted domain (EMC, Organization Configuration, Hub Transport, Accepted Domains) to External Relay and change the MX record on the DNS Server that the exchange server users.
LVL 49

Expert Comment

ID: 36539866
You can do it, in exchange you can only specify the route based on the destination and not on the source. and no there is no way around it
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Expert Comment

ID: 36539874
sorry I mean you CANNOT do it (Typo
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Author Comment

ID: 36540200
I found a RouteBySender transport agent that enables exactly what we require. You can find it here:

Accepted Solution

GWSpectrum earned 0 total points
ID: 36540202
LVL 49

Expert Comment

ID: 36540242
Ok sorry I should have been more specific, it cannot be done natively
LVL 37

Expert Comment

by:Jamie McKillop
ID: 36540244

This is possible, with third-party software - It is fairly expensive though.


Author Closing Comment

ID: 36558853
Actually I am just writing my own, lots of examples available and I program anyhow. Win-Win!

Author Comment

ID: 36540836
Thanks for the help anyhow!

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