Dovecot problem

[Timothy Murphy]

I'm trying to setup dovecot on a new server,
to replace the server I have been using
which is having some hardware problems.

The new server is running CentOS-6.1 ;
the current server is running CentOS-5.7.

Dovecot runs fine on the current server,
but on the new server when I get
------------------------
[tim at blanche ~]$ telnet grover 143
Trying 192.168.2.5...
Connected to grover.
Escape character is '^]'.
Connection closed by foreign host.
------------------------

(I notice I don't have a /var/log/dovecot on the new server,
as I do on the old one.)

On my new server I'm using the very brief /etc/dovecot/dovecot.conf
created by running 
doveconf -n > dovecot-new.conf
as suggested,
and transferring this to dovecot.conf
(keeping the original as dovecot.conf.orig):
------------------------
# 2.0.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-131.17.1.el6.x86_64 x86_64 CentOS release 6.1 (Final)
mbox_write_locks = fcntl
passdb {
  driver = pam
}
protocols = imap
ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
ssl_key = </etc/pki/dovecot/private/dovecot.pem
userdb {
  driver = passwd
}
------------------------

Any advice or enlightenment gratefully received.

-- 
Timothy Murphy  
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College Dublin