Hi all. First of all, thanks to Falko for his tutorials. I have a system prepared for run as a generic Web Server. I use Debian Etch as OS and I've already installed all things necessaries (Apache Webserver, Php, MySQL, etc...). All works so good, except Postfix, I don't be succesful to start it. I follow these two tutorials: 1) The Perfect Setup; 2) Virtual Users And Domains With Postfix, Courier and MySQL. Following this tutorials, all is ok and I'm able to get all the services started. For example, if I launch /etc/init.d/postfix start, it starts and looks ok. So it doesn't work, and if I launch "telnet localhost 25", this is the response: Code: # telnet localhost 25 Trying 127.0.0.1... Connected to localhost.localdomain. Escape character is '^]'. And nothing else matters. All the other things in the 2nd tutorial are good and work fine. I don't know what's wrong. Maybe I failed to write "server1.example.com", I wrote in all "hostname.dyndns.org", where hostname is my real hostname, obviously. So, what is my wrongs? If necessary, I can post other, for example a configuration file, if you want to take a look. I repeat: all the processes start good, following the 2nd tutorial I've problems only in the final command, when I must to launch telnet for testing the correct status. I want to say thanks in advance for your support, and say sorry if my English is not perfect, cause I come from Italy.