We changed our public IP addressing last week. I got my A record and MX record changed, and had our reverse DNS table updated today. We are getting messages
The message cannot be delivered due to a configuration error on the server. Please contact your Administrator. <mail.ccnugget.com #5.3.0 smtp;553 5.3.0
Could not deliver the message in the time limit specified. Please retry or contact your administrator <mail.ccnugget.com #4.4.7>.
Looking at my Queues, I see several SMPT Connectors that look like they were created for specif domains that the emails are kicked back from.
I also have an entry in the event log stating;
Exchange mistakenly attempted mail delivery to an incorrect MTA route.
What is causing this issue?