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How to connect two Exchange 2003 in different domain.

Posted on 2005-03-15
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Last Modified: 2008-01-09
I have 2 domain in different forest in each domain has 1 exchange 2003 for intranet use only.
How to setup Exchange 2003 server in each domain to enable user from domain1 can send mail to user on domain2 and vice versus.
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Question by:njtd
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7 Comments
 
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Accepted Solution

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michaellundgren earned 1200 total points
ID: 13542662
If it's only to the mail flow you're after this can be done pretty quick.

On Domain1 Exchange server: create a SMTP connector and add domain2 as address space.
Specify the connector to use a smart host for mail delivery and add the exchange server in domain2 as the smart host.

On Domain2 Exchange server: create a SMTP connector and add domain1 as address space.
Specify the connector to use a smart host for mail delivery and add the exchange server in domain1 as the smart host.

How to configure an SMTP connector:
http://www.msexchange.org/tutorials/Configuring-SMTP-Connector.html

Regards,
Michael Lundgren
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Author Comment

by:njtd
ID: 13543314
Thanks michaellundgren.
Can I add Exchange server in different domain to the same routing group?
If can, this solution can solve my problem or not?
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LVL 9

Expert Comment

by:michaellundgren
ID: 13544318
No, you can't add Exchange servers from different Exchange organizations to the same routing group.
Why do you need do have the servers in the same routing group?

/Michael
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Author Comment

by:njtd
ID: 13598950
Hi michaellundgren.

I config SMTP connector follow your comment but when I send mail from domain1 to domain2 it show error "Unable to relay for user1@domain2.com".

I don't know what is problem.
Thanks

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Author Comment

by:njtd
ID: 13599658
When I try to enable "Allow messages to be relayed to these domains" I can send email with no problem but user1@domain2.com don't receive any email.
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Author Comment

by:njtd
ID: 13614531
It seem the mail that I send remain in queues.
I don't know how to fix this problem.
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Author Comment

by:njtd
ID: 13627988
After I diable Email Auto-protect from SAV 9, the problem never happen again.
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