[Dovecot] Can't login in Dovecot, clues needed.

Hi,

I'am using Ubuntu Server, and I can't get Dovecot working. Please give me a clue if you can.

Ok, my gide to configuration was https://help.ubuntu.com/community/Dovecot

I tryed to "telnet mydomain.com 110", but the authentication fails, give this error:

-ERR Authentication failed.

Besides this, I can't "telnet mydomain.com 110" outside my localhost

My mail.log tells this:

Oct 5 19:25:29 mydomain dovecot: Killed with signal 15 Oct 5 19:25:29 mydomain dovecot: Dovecot v1.0.10 starting up Oct 5 19:29:33 mydomain dovecot: pop3-login: Disconnected: Inactivity: user=andre@mydomain.com, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, secured

What's wrong in here?

Best regards, Andre.