I have a user who is claiming that his wife can no longer send him emails (as of a couple weeks ago). He also claims that one of our larger customers cannot send him and another person emails any longer too. Today, he got an email for another person that said he had been trying to send him an email from last Thursday or Friday, and he got the following response:
Subject: Delivery Status Notification (Failure)
This is an automatically generated Delivery Status Notification.
Unable to deliver message to the following recipients, due to being unable to connect successfully to the destination mail server.
"our users email address"
Obviously, the message this person sent today was sucessfull, but I asked if his wife could try to send another email to him again, and she is still having the same problem. His wife's email domain is @cox.net. I happen to also have a @cox.net email for personal use, and I was successfully able to email him yesterday.
My question is, I really don't know where to start troubleshooting this problem. I assume I need go into my exchange server system manager, but not sure where to start looking. Maybe there are also Internet tools I can use to test. Any help would be much appreciated!!!