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Migrating Exchange 2003 to 2010.

Posted on 2010-11-22
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Last Modified: 2013-11-05
We have installed a new 2008 Server and installed Exchange 2010 to replace Exchange 2003.  The AD is 2003.  Once the install was complete and we redirected the incoming port 25 on the firewall to the new server, we moved a couple of mailboxes for testing.  In that transition state, all incoming email was rejected (550 5.7.1 Unable to relay).  

If we changed the incoming firewall rule back to the 2003 server, mailboxes still on 03 could receive incoming, but not the mailboxes on 2010.  The 2010 could send email, but not 2003.  When a 2003 user tried to send outbound email, we noted on the 03 event logs that the new server was rejecting the email, again unable to relay.

Any ideas?
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Question by:jim0816
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18 Comments
 
LVL 74

Expert Comment

by:Glen Knight
ID: 34187335
sounds like you have not added an Accepted Domain to Exchange 2010?
Under organisation Configuration add an accepted domain.

You will also need to add under Server Configuration > Hub Transport on the Receive Connector that starts with DEFAULT on the permissions tab add a check in annonymous users.

You might also find there is a smarthost configured on the SMTP Virtual Server on the 2003 server, see my article here for details: http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_3044-Exchange-Server-Mail-Flow.html
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Author Comment

by:jim0816
ID: 34187509
Under organization configuration, "Use a default domain controller" is selected.  Should the domain and domain controller be specified?
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LVL 74

Expert Comment

by:Glen Knight
ID: 34187520
No, this is not required, it also has nothing to do with the accepted domain.

Have you added an accepted domain?
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Author Comment

by:jim0816
ID: 34187579
yes, the accepted domain has been added
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Author Comment

by:jim0816
ID: 34187685
just another note....if I do the telnet test to the 2010 server, I get the unable to relay response.  the mail from and rcpt to addresses are mailboxes are both on the 2010 server.
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LVL 74

Expert Comment

by:Glen Knight
ID: 34187857
From the Exchange Management Shell can you run the following please:

Get-AcceptedDomain

And post the results.

Have you setup an email address policy? Do the users have valid addresses on the email address tab?
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Author Comment

by:jim0816
ID: 34187986
Name                           DomainName                     DomainType                   Default

somedomain.com               somedomain.com               Authoritative                True

there is only the default policy, and it has not been applied
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LVL 74

Expert Comment

by:Glen Knight
ID: 34187996
if nobody has got a valid email address then you will not be able to relay.
Check the users email addresses.

You will also need to create a email address policy
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Author Comment

by:jim0816
ID: 34188274
the users have valid email addresses
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LVL 74

Expert Comment

by:Glen Knight
ID: 34188287
then, technically there is no reason why you shouldn't be allowed to relay.

Did you check the permission on the receive connector I mentioned in my first post?
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Author Comment

by:jim0816
ID: 34188428
yes, it is checked
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Author Comment

by:jim0816
ID: 34188445
I also ran another telnet test, this time i used "server.domain.com" on the rcpt to address, and did not get the "unable to relay" response
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LVL 11

Expert Comment

by:JuusoConnecta
ID: 34188634
jim,

your mx records are the following:

somedomain.com.1.xxxxxx.com	nnn.nnn.nnn.nnn


Looks like you have another "front-end" / "Middle-tier" application between internet against your exchange server ?

If that is the case you should contact the vendor hosting this to configure the application or whatever to accept the mails for your domain,

Or I might have be totally wrong..
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Author Comment

by:jim0816
ID: 34188801
that is a spam filtering service, they just relay email to the public IP of our server
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Accepted Solution

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jim0816 earned 0 total points
ID: 34218391
The problem turned out to be the SMTP service was installed and enabled.  Disabling the service then restarting the Exchange Transport service solved the problem.
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LVL 74

Expert Comment

by:Glen Knight
ID: 35025339
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
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