For some reason, when I try to telnet to localhost (at 14. in the how-to, page 5), I get no response #telnet localhost 25 Trying 127.0.0.1... Connected to localhost.localdomain (127.0.0.1). Escape character is bla-blah This looks normal, of course. But when I type "ehlo something", or anything at all, there is absolutely no replyn from the terminal. "quit" doesn't even quit, and the telnet session cannot be killed. I have to kill the terminal windows and open a new one to continue. Any ideas? Telnetting to pop3 (110) works fine, as do 10024 works. But 10025 fails in the same way. This tells me with no uncertainty that the problem is the SMTP server (Postfix), since both 25 and 10025 maps to that service. Correct me if I'm wrong.