dovecot - Mar 2008 - messages downloading repeatedly to mozilla/seamonkey pop3 client

Hello Dovecot List,
  I am a bit of a sysadmin novice and this is my first time emailing,
so please let me know if I have left some critical information out.  I
am supporting a small office network supported primarily by linux
servers.  All of my users are using dovecot as a pop3 daemon on a
centOS 5 box, no IMAP users.  Seven users are running outlook 2003 on
windows XP, two users are running thunderbird on ubuntu, two are
running evolution on ubuntu, and one is running mozilla seamonkey on
XP.  Emails to the mozilla/seamonkey user are downloading multiple
times, but not to any of the other users.

A typical maillog report following this user's mail client pop3 login:

Mar  3 10:37:00 servername dovecot: pop3-login: Login: user=<user>,
method=PLAIN, rip=::ffff:192.168.99.13, lip=::ffff:192.168.99.4
Mar  3 10:37:00 servername dovecot: POP3(user): mbox sync: UID
inserted in the middle of mailbox /var/mail/user (84873 > 84872,
seq=2, idx_msgs=3)
Mar  3 10:37:01 servername dovecot: POP3(user): mbox sync: UID
inserted in the middle of mailbox /var/mail/user (84877 > 84872,
seq=2, idx_msgs=4)
Mar  3 10:37:01 servername dovecot: POP3(user): Disconnected: Logged
out top=0/0, retr=1/3364, del=1/1, size=3347

Things I've tried:
*adding the following lines to dovecot.conf:
protocol pop3 {
  pop3_uidl_format = %08Xu%08Xv
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
}
*deleting the user's homedir mail directory (including all dovecot index
files)
*restarting dovecot
*changing mail clients: tried outlook express, netscape 4.8,
thunderbird on user's PC
*restarting the server

All changes resulted in only a brief (1-2hr) cessation of the problem.

I've subscribed for a month or so now and searched the archives, but
if I missed a solution to this in there, I apologize.
Thanks,
Ben Julian

On Wed, 5 Mar 2008, Ben Julian wrote:
> All changes resulted in only a brief (1-2hr) cessation of the problem.
>
> I've subscribed for a month or so now and searched the archives, but
> if I missed a solution to this in there, I apologize.
That sounds like a drag.  Let's see if we can help you.

Can you paste the results of dovecot -n into a message?  That way we can 
see your whole configuration.  What version of Dovecot are you using, and 
where did you get it from?

(I'm expecting you to tell me you're running some really old version,
and
I further expect that if you upgrade your woes will go away; but let's 
see!)

-- Asheesh.

-- 
A long-forgotten loved one will appear soon.

Buy the negatives at any price.

Asheesh,
  Sorry about the long delay.  I tried upgrading to version 1.0.12,
which I understood to be the newest release for CentOS 5.    I am
still experiencing the problem.   What should I try next?
Thanks,
Ben

On Wed, Mar 5, 2008 at 5:51 PM, Ben Julian <ben.julian at gmail.com>
wrote:
> Just read "[Dovecot] Problem with Thunderbird hang, multiple retry to
>  .Sent/.Draft" thread, and I see that I have the same version and
>  really need to upgrade.  I will try that first.
>  -Ben
>
>
>
>  On Wed, Mar 5, 2008 at 4:48 PM, Ben Julian <ben.julian at gmail.com>
wrote:
>  > output of dovecot -n:
>  >
>  >  # /etc/dovecot.conf
>  >  login_dir: /var/run/dovecot/login
>  >  login_executable(default): /usr/libexec/dovecot/imap-login
>  >  login_executable(imap): /usr/libexec/dovecot/imap-login
>  >  login_executable(pop3): /usr/libexec/dovecot/pop3-login
>  >  first_valid_uid: 100
>  >  mail_executable(default): /usr/libexec/dovecot/imap
>  >  mail_executable(imap): /usr/libexec/dovecot/imap
>  >  mail_executable(pop3): /usr/libexec/dovecot/pop3
>  >  mail_plugin_dir(default): /usr/lib/dovecot/imap
>  >  mail_plugin_dir(imap): /usr/lib/dovecot/imap
>  >  mail_plugin_dir(pop3): /usr/lib/dovecot/pop3
>  >  pop3_client_workarounds(default):
>  >  pop3_client_workarounds(imap):
>  >  pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
>  >  auth default:
>  >   passdb:
>  >     driver: pam
>  >   userdb:
>  >     driver: passwd
>  >
>  >  Version of dovecot: 1.0.rc15
>  >  Came as the bundled pop3/imap client with CentOS5, version
2.6.18-8.el5
>  >
>  >  Thanks Asheesh,
>  >  Ben
>  >
>  >
>  >
>  >
>  >  On Wed, Mar 5, 2008 at 3:27 PM, Asheesh Laroia <asheesh at
asheesh.org> wrote:
>  >  > On Wed, 5 Mar 2008, Ben Julian wrote:
>  >  >
>  >  >  > All changes resulted in only a brief (1-2hr) cessation of
the problem.
>  >  >  >
>  >  >  > I've subscribed for a month or so now and searched
the archives, but
>  >  >  > if I missed a solution to this in there, I apologize.
>  >  >
>  >  >  That sounds like a drag.  Let's see if we can help you.
>  >  >
>  >  >  Can you paste the results of dovecot -n into a message?  That
way we can
>  >  >  see your whole configuration.  What version of Dovecot are you
using, and
>  >  >  where did you get it from?
>  >  >
>  >  >  (I'm expecting you to tell me you're running some
really old version, and
>  >  >  I further expect that if you upgrade your woes will go away;
but let's
>  >  >  see!)
>  >  >
>  >  >  -- Asheesh.
>  >  >
>  >  >  --
>  >  >  A long-forgotten loved one will appear soon.
>  >  >
>  >  >  Buy the negatives at any price.
>  >  >
>  >
>

On Wed, 2008-03-05 at 15:17 -0500, Ben Julian wrote:
> Mar  3 10:37:00 servername dovecot: POP3(user): mbox sync: UID
> inserted in the middle of mailbox /var/mail/user (84873 > 84872,
> seq=2, idx_msgs=3)
This is the main problem, these shouldn't happen. Can the user access
the mailboxes directly?

See http://wiki.dovecot.org/MboxProblems
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Timo,
  The user can't access the mailbox directly under normal use
circumstances.  He doesn't have a smb share setup to allow him access
to the mbox file.  As far as I know, the only program besides dovecot
doing editing of the mail is spamassassin, but that happens before the
mail is written to the mbox.  Perhaps I am misunderstanding your
question?
-Ben

On Mon, Mar 10, 2008 at 9:26 PM, Timo Sirainen <tss at iki.fi>
wrote:
> On Wed, 2008-03-05 at 15:17 -0500, Ben Julian wrote:
>  > Mar  3 10:37:00 servername dovecot: POP3(user): mbox sync: UID
>  > inserted in the middle of mailbox /var/mail/user (84873 > 84872,
>  > seq=2, idx_msgs=3)
>
>  This is the main problem, these shouldn't happen. Can the user access
>  the mailboxes directly?
>
>  See http://wiki.dovecot.org/MboxProblems
>