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Exchange is blocking certain domains

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
0
Mcottuli
Asked:
Mcottuli
1 Solution
 
ash007Commented:
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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