I have internal messages being deferred with the error: host mx.wharchs.com [18.104.22.168] said: 451 4.0.0 temporary message delivery failure. try again (in reply to end of data command)
I have a feeling my hosts file needs adjusting. I have two nics to the internal network, and two to the outside world. My hosts file includes:
192.168.1.214 webmailint.wharchs.com webmail
My DNS has mx.wharchs.com = 22.214.171.124
Should I be changing the last line of my hosts file to mx.wharchs.com?