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domain DNS issues

Posted on 2007-03-28
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Last Modified: 2010-04-20
I have 2 sites, both running sbs2003.  site A had email domain @sitea.co.uk this email domain was moved to site b.  So site A has @newdomain.co.uk, site B has @sitea.co.uk.  Site A and B have local DNS domain names  different from the external domain names.  The following error occurs when sending emails from site A to site B.  

A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients. Contact your administrator.

When I ping sitea.co.uk from site A it resolves to its old external IP address, if I ping anywhere from the outside then it resolves to its new IP correctly.

I am presuming the issue is that site A still thinks that sitea.co.uk still resides on site A server, which it doesnt.  I've cleared out DNS cache and removed all trace of the domain in the exchange recipients policy.

It gets even stranger!! When I send an email from site B to administrator@newdomain.co.uk it arrives in the administrator mailbox as the old recpient from site A.

If anyone can make sense of this please do respond
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Question by:D_Hartup
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Jeffrey Kane - TechSoEasy earned 750 total points
ID: 18809573
How did you change the email domain name at Site A?  You should have done so by running the Configure Email and Internet Connection Wizard (CEICW -- which is linked as Connect to the Internet in the Server Management Console > To-Do List).

Then, the question would be, how long ago did you make all of these changes?  Because if you just recently modified the Host Records in your PUBLIC DNS Zone File it can take up to 48 hours to propagate to all name servers.

Jeff
TechSoEasy
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