Exchange server 2007 451 error messages ONLY for aol, aim and comcast.
Posted on 2012-03-30
We recently had a new ISP install a new internet line so we got a new WAN ip and info from them as well as a new firewall that they manage. Ever since we changed over on Wednesday we get error 451's when trying to send out to aol, aim and comcast. Why? Nothing has changed on our end and they control the firewall side.
Any help would be great.