. Hi Guys, I have a major problem over here. I am presently using Exchange server 2000 and I noticed that people are able to telnet into my port 25 and use my server as a relay. I tried setting the configuration on the smtp virtual server but it was all to no avail. Please could anyone guide me on what to do so as to stop mail relaying on my server. The configurations on the smtp virtual server are quite tricky. Thanks for your help Seyi