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Exchange 2007 and Gmail

Posted on 2014-03-26
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Last Modified: 2015-11-05
I’m running Exchange Server 2007. I have users that also have email accounts with Gmail. (username@googlehosteddomain.com), these are working fine. However, when I try to send a message from user@myadomain.com to an alies@googlehosteddomain.com, my server reply’s with the following error:  

“#554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain ##“

So what’s happening is Exchange is not letting the message leave the domain. The alias accounts work fine from outside the domain.

Any ideas?  Thanks.
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Question by:mapalaska2003
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Expert Comment

by:Adam Brown
ID: 39957439
Is googlehosteddomain.com listed anywhere in your Active Directory's DNS zones? Exchange will give that error if it tries to find MX records for the domain it is sending to and can't find them. Log on to your Exchange server and run NSLOOKUP from the CMD prompt.

When NSLOOKUP opens, you'll have a simple > prompt. Enter this:
set type=mx

then type out googlehosteddomain.com and hit enter. If DNS doesn't return anything when you do this, then Exchange can't find any DNS records for googlehosteddomain.com and can't send to it as a result.

To fix this, you would need to check your DNS settings to make sure googlehosteddomain.com was being propery resolved with authoritative data. If you have a domain zone in your internal DNS for that domain name, but have no MX records listed, that will cause your problem. If that's the case, you should delete the Zone for that domain.
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Author Comment

by:mapalaska2003
ID: 39957520
when I enter:  set type=mx googlehosteddomain.com, Iget  an Unrecognized command error?
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Adam Brown earned 500 total points
ID: 39957603
Just enter set type=mx on a line by itself and hit enter. Then enter the domain name.
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Author Comment

by:mapalaska2003
ID: 39957614
Thanks. That worked. i do get a response. But still get the "#554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain ##" error returned from my server when trying to send to an email to an alies address to that domain.
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Author Closing Comment

by:mapalaska2003
ID: 41194547
Thanks.
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