We have a single Microsoft SBS2011 running Exchange 2010, using DNS rather than a smart host for communications. All was working well.
We have just changed our public ip address, which we thought we had configured correctly, however, we find that whenever we send mail to *@aol.com the mail just sits in a queue in the exchange server with READY status.
The messages are just building up.
Can anyone advise why this would happen after an IP address change, and what we need to resolve it?
Any help would be very much appreciated.