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Small Business Server 2008 can't receive external emails

Posted on 2009-04-06
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Last Modified: 2013-11-30
I have recently migrated a client from SBS 2003 to SBS 2008.  Everything has been going fine till today, now external email can't be received.  The message I get is :

      jo@blogs.org on 06/04/2009 12:00
      The e-mail system was unable to deliver the message, but did not report a specific reason. Check the address and try again.  If it still fails, contact your system administrator.
            < mk-outbboundfilter-4.mail.uk.tiscali.com #5.0.0 smtp; 5.1.0 - Unknown address error 550-'5.7.1 Unable to relay' (delivery attempts: 0)>


Can anybody help me ?
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Question by:hagueit
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Chris Dent earned 500 total points
ID: 24076116

You've checked the MX Records for your domain?

SBS 2008 comes with Exchange 2007 doesn't it? Can you check the Accepted Domains under Organisation Configuration in Exchange Management Console.

And under Server Configuration, Hub Transport, check the Default Receive Connector allows Anonymous Connections (required for public mail delivery into your system). This will not make it an open relay in case that worries you.

Chris
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Author Closing Comment

by:hagueit
ID: 31566963
The Accepted Domains where  set wrong, I changed this and now is all working as it should be.  Thanks
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