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Exchange 2007 Sending Internal E-Mail to Wrong Site

Posted on 2009-02-18
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Last Modified: 2012-05-06
We have multiple Active Directory sites with Exchange 2007 servers in each site. We have a problem where a user in site A is trying to send a message to a user in site B but the message is ending up in the e-mail queue at site 3. The queue viewer on the Exchange server in site three describes it as "smtp relay to remote active directory site." How do we configure e-mails to correctly go from site A to site b without issue? Also, how do we get teh queued messages delivered? More info: this is only an issue for sending from site A to site B. Also, some message from site A do get delivers to site be but it is random. Also, messages from site B are delivered without issue and any site sending or receiving mail to or from the Internet (i.e. other e-mail domains) are delivery without issue. Any ideas?
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Question by:inmdhd
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Mestha earned 1500 total points
ID: 23676177
Do you have sites and services configured correctly in AD?
Do you have a hub transport server in each site?
What are the costs between the sites?

-M
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Author Comment

by:inmdhd
ID: 23676814
Yes, looked at the sites. The connection from site A to site B has a lower cost than the link from site A to site C. Is there something in the Exchange management console that can affect this?
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Expert Comment

by:Mestha
ID: 23676936
Exchange 2007 doesn't do routing like Exchange 2003. It uses the domain for routing. Can the servers in those two sites see each other correctly? That would account for it going the long way round.

-M
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Author Comment

by:inmdhd
ID: 23680631
They can see each other. In AD Sites and Services, the link between site A and site B is lower than the link between Site A and Site C. Also, there is no link defined between site B and and site C. So that still makes me still wonder why mail from site A to site B is trying to send it via site C
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Author Comment

by:inmdhd
ID: 23680703
I should add that site A is set up as a hub site in Exchange 2007. The other sites are not. I don't know if this provide a clue.
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Expert Comment

by:Mestha
ID: 23681826
You should have a hub transport server in each AD site.
Email is passed between sites by hub transport. Hub then delivers the email to the mailbox server.

-M
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Author Comment

by:inmdhd
ID: 23682404
How does one view the routing tables (other than AD Sites and Services) used by Exchange to determine the lowest-cost route to send e-mail?
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LVL 65

Expert Comment

by:Mestha
ID: 23682435
I am not aware that you can - as Exchange uses Sites and Services.

-M
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Author Comment

by:inmdhd
ID: 23712244
Problem resolution: the subnet for site B was listed as being on the same subnet as site A. I corrected this to resolve the problem.
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