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New Exchange 2013 often rejects mails

Posted on 2013-10-31
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Last Modified: 2013-11-11
Honnored Experts and fellow geeks :-)

I have a customer with a strange problem (always strange problems from customers)

Recently they installed a new Server 2012 as a member server with Exchange 2013.

At least once every day the server seems to reject mails giving senders a Non Delivery Report saying:

#554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain ##

If you simply restart the server everything is working fine for some hours.

Can anyone give me some clues?
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Question by:Ohmit
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by:Simon Butler (Sembee)
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Which version of Exchange 2013? RTM, CU1 or CU2?
Anything else installed on the server?

Simon.
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by:Ohmit
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Hi Simon :-)
Where can I find this info?
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Simon Butler (Sembee) earned 500 total points
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Follow the steps here:
http://technet.microsoft.com/en-us/library/hh135098(v=exchg.150).aspx

If it isn't CU2, then you should upgrade the server. Although CU3 is due soon.

Simon.
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