I have a specific domain that isn't receiving mail. It was working at one time but I was working on spam assassin and antivirus yesterday so I'm not sure what I did.
I'm getting this message when I try to send to an email on that domain:
How do I trouble shoot this error?Delivery to the following recipient failed permanently:
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain mydomain1.com by smtp.secureserver.net. [18.104.22.168].
The error that the other server returned was:
550 #5.1.0 Address rejected.