I have an ASP page that I am working on that uses CDONTS so it needs to be supported by IIS SMTP feature. It works fine on a server we have running with IIS only. But on the server I need it to work on SMTP will not respond when I try to start it from the management console. I tried rebooting and reinstalling the service pack. I think that the problem is we are running Exchange off of this same server and both are using port 35 for<BR>I am dont know anything about these logical ports. can i just go in and set IIS SMTP to any given port that I choose like port 36? or is there a set of available ports from which i can choose and if so where can i find them? i have done all kinds of websearches trying to find information to explain ports but to no avail... please help