We have SMTP Gateway installed on win2k3 to route all incoming and outgoing mail. I enabled only one server which is our exch2k3 that has access to relay through that smtp server, but if I go to these websites: http://msv.dk/ms009.asp
test my server for relay, it relays one out of ten tries. How can I stop this?
I tried 3rd party products like mailsweeper, astaro and Symantec Mail Security for SMTP, all those products worked great for relay issue, but the price is too high.