Virtual Users+Postfix+Courier+CentOS problem telnet localhost 25

[stinson]

Hi! I'm trying to setup Postfix+Courier on my CentOS 5.5 server with the howto:
http://howtoforge.com/virtual-users-...ysql-centos5.1

I connect to pop3 (telnet localhost pop3) and it works fine but when I type the command "telnet localhost 25" i can see something like:
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.

Then the only thing I can do is to close the console. I tried to type ehlo localhost without result and also tried quit, with the same (no) result.

I hope you could help me.
Sorry about my (limited) english :S