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Exchange AD contact for forwarding mail - won't forward external mail back out?

Posted on 2008-10-16
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Last Modified: 2013-11-30
I have an Exchange 2003 Server (under SBS 2003).

A recipient mailbox needs to forward it's mail out to an external address.

I have used a new AD contact (SMTP address) and Exchange is successfully forwarding internal mail out to the mailbox.  However, external mail is not being forwarded.  The mail method is an SMTP smarthost so I can't think of any reason it wouldn't send external mail out to what is a completely different domain address.
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Question by:zzzillion
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robclarke41 earned 2000 total points
ID: 22729379
What does Message Tracking say for one of these external messages?

Perhaps your Smarthost is only allowing outbound mail with your domain name. If you change it to accept all outbound mail from the Exchange IP address that should fix it.
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by:zzzillion
ID: 22729568
You nailed it.

That's exactly it - just checked.  Unfortunately the smarthost doesn't allow unlimited domain forwarding!  Hmm.  Thanks for the answer though.
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