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Just had MX record update this morning, getting Permanent Failure: 550_5.7.1_Unable_to_relay

Posted on 2006-05-21
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Last Modified: 2010-07-27
We are migrating from a POP 3 external hosting company to internal Exchange SBS. We had the MX record updated this morning at priority 1 and now we are getting "Permanent Failure: 550_5.7.1_Unable_to_relay". We had our local ISP to the building update the PTR records as well. NSLOOKUP is still pointing at the externally hosted IP so the mail should still be working from their site, should it not? I am aware that it takes 24-48 hours to fully replicate across the DNS world at large, but if the lookup still has the old address, there shouldn't be a problem.

Am I off a bit on my assumptions?
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Question by:jefferybush
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Sembee earned 200 total points
ID: 16731621
Is this inbound or outbound?

If it is inbound then the problem is with your server.
If this is outbound, then switch to using a smart host for a little while - use your ISPs SMTP server.
http://www.amset.info/exchange/smtp-connector.asp

Simon.
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by:jefferybush
ID: 16731669
It was inbound, I could send mail out from OWA without a problem. This was a new mail server config.  I checked the server as suggested and the domain was created as domainname.local, so I added a new SMTP mail alias in the Recipent Policy for domainname.com....Working fine now! Thanks.
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