If One of two servers fails to update SMTP settings. Other server is sending SMTP successfully. Full error when trying to enable SMTP directly on the affected server is "Could not connect to the SMTP server smtp-relay@abc.com on port 25. SocketException occurred. Inner Exception message follows: A non-recoverable error occurred during a database lookup."
SMTP relay works on the server manually with PowerShell.
GPOADmin would not consider an '@' symbol to be a valid character in a SMTP server name, we would expect the FQDN. The '@' symbol should only appear in an email address, not in a server name.
The '@' symbol is causing the database lookup error from what our testing has found.
We would recommend that either enter the FQDN of the smtp server with no '@', or enter the IP address of the SMTP server.
