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Exchange is blocking certain domains

Posted on 2014-01-08
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Last Modified: 2014-01-24
All of a sudden there are certain sending domain unable to send mail to my company. They get a returned error message as follows.

"Unable to deliver message to user@******.com
Delivery Failed for the following reason:
Error Delivering message to "my IP address"

"This has been a temporary failure. We will attempt to deliver this message every hour............."

Very generic message. How can I find some type of log that tells me what is happening and why? There is absolutely nothing in the Windows Event log. SBS2008 running Exchange 2007. Thanks
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Question by:Mcottuli
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ash007 earned 2000 total points
ID: 39765318
Hi,

Plz confirm if its for certain or all domains also try sending mail from gmail to your account & check

If still same then check if you Exchange server has become  blacklisted using Mxtoolbox.com





Thanks,
Ash
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