troubleshooting Question

Reverse DNS FAILED! This is a problem

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nigelbeatsonFlag for United Kingdom of Great Britain and Northern Ireland asked on
7 Comments1 Solution401 ViewsLast Modified:
We have just recently installed a new leased line for our internet services, which involved a new public IP address. Since then we are finding that some external recipients are not receiving email. We have a single Microsoft SBS2011 server running exchange.

On checking with MXTOOLBOX, we get the following error :-

Reverse DNS FAILED! This is a problem

I am sure that this is the problem, but how do I fix it??

We did create a new MX record on our ISP / Domain name host pointing to the new IP address, and for most parts it all seems to work, but I could do with getting rid of this error.

Does anyone have any ideas on how we resolve this issue?

Many thanks.
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