I am not able to receive any external email. I telnet into the server telnet mail.mycompany.com 587, HELO gets response, MAIL FROM: firstname.lastname@example.org gets;
530 5.7.1 Client was not authenticated
Connection closed by foreign host.
I verified that Anonymous was enabled in the receive connector, I even deleted and recreated the Receive Connector.
Nothing of note in the Eventlogs.