I have setup an exchange server on premise with at SMTP Relay on our VPS. It works very well, unfortunately I’m a little confused as to where I setup the various permissions for SPAM. All my incoming email receives The error that the other server returned was:
550 5.7.1 Message rejected as spam by Content Filtering.
The only way to get around it is to add the domain as an authoritative as an accepted domain. Which I assume must be the incorrect way to add them. So please someone tell me where it is I can setup who can email in via my SMTP server? Thanks in advance