Removing 2nd SMTP domain from an Exchange 2003 Organizatioin

shutterhacker used Ask the Experts™
Please help!

We have an Exchange 2003 SP2 hosting two SMTP domains and The OS is Windows 2003 SP1 (it is an SBS 2003 for that matters). The group is moving off so we have set up a new Exchange for them. Now when people send emails to people the mails need to go out of the old server. What is the correct procedure for removing from the old server?

So far I have tried:

On the old server there is only on Recipient Policy - "Default Policy" which contains two SMTP addresses and, with as primary. I removed from the policy. When I hit OK it asked if I want to apply the policy down I chose NO. The address space was indeed removed from the policy.

After that, the server won't send any email to outside. All mails are stuck in the queues. Tracking showed they all stopped at "Message routed and queued for remote delivery" but never reached "Start outbound transfer of message".

I put the back to the policy. The server started to send mail to outside.

I knew I missed some steps here. I had not remove the references to in users and public folders' email addresses. But I want to know if anybody has done this type of work? Is there a known good procedure to follow? The old server is still the production server for people. Breaking it will piss them off big time.

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remove the recipient policy, clear any email addresses make sure there is a valid MX record for, flush dns.  check to make sure there isn't a forward lookup zone for it should start working correctly in a few hours.

SBS2003 is fairly limited so I wouldn't think there'd be anything really stuck in there referring to exchange stuff.  once the recipient policy and addresses are removed.

you might try and add a forward lookup zone with all the  A records for's mail and web if it's not working soon, and mx record of course.


Thank you Harel.

The forward lookup zone for has been removed weeks ago from two DNS servers in the domain that the old exhange server resides in. The MX record for has been created for few weeks. On the old server the resolving client (by ping) seems to be fine revolving the MX record for to the correct public address. I think this prep is complete.

Which one should we do first?

Clearing all address


removing from the default policy?

When I remove, should I choose yes to "do you want to apply down the policy"? I am wary about YES because I am sure exactly what it means. The users in ADUC have "Automatically update e-mail addresses based on recipient policy" checked. I don't know what the consequence to existing addresses when I choose Yes.
I believe you should, if it's the question about applying the policy to all recipients, you want to remove it. if your domain has moved to a new server.
get a screen shot of the exact dialog question.
it's been a while since I've dropped a recipient policy and don't want to tell you the wrong thing.
basically removing the domain from the group is exactly what you want to do.
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Thanks again. Applying the policy down, I was able to make it work this time. Mail flow is normal now.


I've requested that this question be closed as follows:

Accepted answer: 0 points for shutterhacker's comment #a39457518

for the following reason:

Helpful tips.


Thanks again.

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