[CentOS] dovecot problem -- not deleting messages from server after downloading them

[Alexander Dalloz]

Am 13.08.2011 21:44, schrieb Charlie Brune:
> I recently installed CentOS 6.0 and Dovecot 2.0.
> 
> My problem is that, when I download emails to my laptop (running 
> Thunderbird), the emails are NOT deleted from my server.  They stay 
> there and are downloaded again and again.  8-(
> 
> The "Leave messages on server" option in Thunderbird is not checked.
> 
> I have several laptops that used to work when I ran CentOS 5.6 / Dovecot 
> 1.x.  I haven't changed their configuration and they all have the same 
> problem.
> 
> Here's a sample (personal data removed) of /var/log/maillog when I 
> download messages (note the "del=0/487" on the 2nd line):
> 
> Aug 13 14:28:54 chasserver dovecot: pop3-login: Login: user=<centos>, 
> method=PLAIN, rip=192.168.0.2, lip=192.168.0.27, mpid=18393, TLS
> Aug 13 14:29:28 chasserver dovecot: pop3(centos): Disconnected: Logged 
> out top=0/0, retr=487/2134628, del=0/487, size=2126323
> 
> My "dovecot -n" output is below.
> 
> Thanks,
> Charlie
> 
> # dovecot -n
> # 2.0.beta6 (3156315704ef): /etc/dovecot/dovecot.conf
> # OS: Linux 2.6.32-71.29.1.el6.i686 i686 CentOS Linux release 6.0 (Final)
> mail_location = mbox:~/mail:INBOX=/var/mail/%u
> mbox_write_locks = fcntl
> passdb {
>    driver = pam
> }
> ssl_cert = </etc/pki/dovecot/certs/dovecot.pem
> ssl_key = </etc/pki/dovecot/private/dovecot.pem
> userdb {
>    driver = passwd
> }

According to the POP3 protocol messages are first marked to be deleted
by the server on DELE command, but only really deleted in the UPDATE
state, means after the QUIT command.

Alexander