We recently changed our external IP's and mx records to a new address. Since then we have not been able to get to anyone @comcast.net. I have contacted our provider and made sure we have the reverse DNS happening as well as our PTR updated. All is well for other recipients. HEre is the error I get back. Any ideas?
Your message did not reach some or all of the intended recipients.
Subject: Testing email account
Sent: 6/26/2009 9:09 AM
The following recipient(s) cannot be reached:
firstname.lastname@example.org on 6/28/2009 9:14 AM
Could not deliver the message in the time limit specified. Please retry or contact your administrator.