I have users who are experiencing delays or failures when sending to valid email addresses.
A technician on the mail recipent's end tells me:
I have got word that the issue is on your end (somewhat) there is this thing called reverse look-up that is not setup right on your mail server (this is according to our mail service).
He said he has setup an exception to the rule for now but would like you to look into the issue with your mail server.
He said to mention the reverse lookup and they should know what you are talking about. Something to do with the ability to track SPAM as most spammers shut down this service in order to block the ability to track them.
Can someone assist me or direct me to documentation on how to correctly configure this?
Thanks so much for any assistance that you can provide