POP3 server failed (Postfix, Dovecot, MySQL on Ubuntu)

I did install Email with Postfix, Dovecot and MySQL on Ubuntu 10.04 LTS (Lucid)

~~[http://library.linode.com/email/postfix/dovecot-mysql-ubuntu-10.04-lucid#sphmore-information" target="blank">](http://library.linode.com/email/postfix … nformation">http://library.linode.com/email/postfix/dovecot-mysql-ubuntu-10.04-lucid#sph_more-information](

Last entries:

chgrp vmail /etc/dovecot/dovecot.conf

chmod g+r /etc/dovecot/dovecot.conf

Then the POP3 server failed:

telnet localhost pop3

Trying 127.0.0.1…

telnet: Unable to connect to remote host: Connection refused

How can I solve the issue?

These entries/warnings may help to identify the problem and how can I fix these?

/var/log/mail.log

Sep 12 15:40:21 xxxx dovecot: master: Dovecot v2.0.19 starting up (xxxx dumps disabled)

Sep 12 15:40:21 xxxx dovecot: ssl-params: Generating SSL parameters

Sep 12 15:40:27 xxxx postfix/master[6876]: daemon started – version 2.9.3, configurati$

Sep 12 15:40:37 xxxx dovecot: ssl-params: SSL parameters regeneration completed

Sep 13 08:41:23 xxxx postfix/master[2296]: daemon started – version 2.9.3, configurati$

Sep 13 08:41:33 xxxx dovecot: master: Dovecot v2.0.19 starting up (xxxx dumps disabled)

Sep 13 10:10:19 xxxx postfix/master[2296]: terminating on signal 15

Sep 13 10:10:19 xxxx postfix/master[3190]: daemon started – version 2.9.3, configurati$

Sep 13 11:36:44 xxxx dovecot: log: Warning: Killed with signal 15 (by pid=1 uid=0 code=$

Sep 13 11:36:44 xxxx dovecot: master: Warning: Killed with signal 15 (by pid=1 uid=0 co$

service postfix restart - generates warnings i.e.:

• Starting Postfix Mail Transport Agent postfix postconf: warning: /etc/postfix/main.cf: unused parameter: virtualcreatemaildirsize=ye s

postconf: warning: /etc/postfix/main.cf: unused parameter: virtualmaildirextended=yes

postconf: warning: /etc/postfix/main.cf: unused parameter: virtualcreatemaildirsize=ye s

…

/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtualcreatemail dirsize=yes

/usr/sbin/postconf: warning: /etc/postfix/main.cf: unused parameter: virtualmaildirext ended=yes

…