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Internet e-mail after moving mailbox

By paulkutt ·
Cannot send or receive Internet e-mail after moving mailbox to a new Exchange server.

I recently got a new member server and installed Windows 2003 R2 on it. I installed Exchange Server 2003 on the new server. My intention is to retire the old Exchange 2003 server as the hardware is old, underpowered, and is failing. The domain is windows 2003 and has been very stable. Exchange 2003 has been very stable. Install went smoothly and now both Exchange servers are at Exchange SP2. All of the server's event logs are clean. I ran the Exchange 2003 baseline and performance tools without significant issues showing up. When I move a mailbox to the new server the user can continue to send and receive internal e-mail but sending Internet e-mail results in the following NDR

You do not have permission to send to this recipient. For assistance, contact your system administrator.
<host163.DOMAIN NAME #5.7.1 smtp;550 5.7.1 <EXTERNAL E-MAIL ADDRESS>... Relaying denied.>

I have checked all of the appropriate relay settings I can think of and compared settings to first server. I have searched for suggestions on MS Support and with general Internet searches. I have not found a solution yet. Moving the mailbox back restores functionality.

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by curlergirl In reply to Internet e-mail after mov ...

You have to allow relaying between the two servers and set the new server to relay all mail through the old server, or vice versa, until you remove the older server from the network.

To relay through the old server, on the new server, go to the properties of the Default Virtual SMTP Server, go to the Delivery Tab, click the Advanced button, and put the FQDN of the older Exchange server in the Smart Host field. On the older server, be sure to allow relaying from the IP address of the new server.

When you're ready to switch everything over to the new server, you will, of course, need to change your DNS entries or, if you're using a NAT router, your redirect so that the mail is delivered and sent properly from the new server instead of the old one. Then, you will need to remove the Smart Host entry to allow the new server to send directly to the Internet.

Hope this helps!

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