I have seen several questions relating to this issue , but cannot seem to find a fix.
I have a website that when it sends mail through my Exchange server and gets this error,
Mailbox unavailable. The server response was: 5.7.1 Unable to relay
I have added the webserver IP address in the allow relay hosts in the SMTP settings, but that does not resolve the error. I can allow relay from everywhere and mail goes through fine, but I don't want to leave this open. I have read about a tool called ExMetabaseCheck but I cannot find it anywhere, and if I do find it can I run it on a live server??
Also are there any logs that will verify the IP address of the webserver is the IP address that relay is being blocked from.....
Any help will be appreciated!!