I have a client with an AMD raid controller and have configured RAIDXpert2 to send email messages from it. I have configured it to send over the internet to our exchange server 2016. The message gets sent but doesn't get to me. Looking at the Exchange server receive log I see the connection from the remote raid controller, I get Sender OK, RCPT TO: <my email address>, Recipient OK, then instead of the next line being DATA, I get RSET from the raid controller. The raid controller is on a Server 2016 server. It has to be something simple but I can't figure it out!! I have configured RAIDXrert2 with no username or password and it is sending on port 25. (I can see the connection come through the Untangle box). I get email messages from other remote devices OK so I am puzzled.
Extra Info: The same server uses Cloudberry backup server and is emailing me every day.