The simple answer is: modify the smtp banner so that you can see who responds. On the server that you are connecting to: Get-receiveconnectors Look for the Identity field & note that. Set-receiveconnector –identity “NameOfConnector...

UPDATED: The public hotfix is now available for this. We are seeing a new issue where you are unable to configure the Access Tab of the SMTP Virtual Server. This happens on a server running SMTP and MOSS. Users are seeing this issue after applying...