[Dovecot] pop3+leave messages on server

[Papp Tamás]

Timo Sirainen wrote, On 2009. 12. 29. 21:08:
> dovecot -n output could be helpful. Also did you look at logs? Maybe
>   

Yes, I looked logs, I didn't found an error.

This is dovecot -n:

# 1.2.9: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.28-15-server x86_64 Ubuntu 9.04 xfs
protocols: imap imaps pop3 pop3s managesieve
ssl_cert_file: /data/apps/dovecot/mail.exampledomain.hu.pem
ssl_key_file: /data/apps/dovecot/mail.exampledomain.hu.pem
disable_plaintext_auth: no
login_dir: /var/run/dovecot/login
login_executable(default): /usr/lib/dovecot/imap-login
login_executable(imap): /usr/lib/dovecot/imap-login
login_executable(pop3): /usr/lib/dovecot/pop3-login
login_executable(managesieve): /usr/lib/dovecot/managesieve-login
login_user: _dovecot
verbose_proctitle: yes
first_valid_uid: 1
mail_privileged_group: dovecot
mail_uid: dovecot
mail_gid: dovecot
mail_location(default): maildir:/data/mail/%d/%n/Maildir/
mail_location(imap): maildir:/data/mail/%d/%n/Maildir/
mail_location(pop3): maildir:/data/mail/%d/%n/Maildir/
mail_location(managesieve): maildir:/data/mail/%d/%n
maildir_stat_dirs: yes
maildir_copy_preserve_filename: yes
maildir_very_dirty_syncs: yes
mbox_write_locks: fcntl dotlock
mbox_dirty_syncs: no
mail_executable(default): /usr/lib/dovecot/imap
mail_executable(imap): /usr/lib/dovecot/imap
mail_executable(pop3): /usr/lib/dovecot/pop3
mail_executable(managesieve): /usr/lib/dovecot/managesieve
mail_plugins(default): quota imap_quota deleted_to_trash
mail_plugins(imap): quota imap_quota deleted_to_trash
mail_plugins(pop3):
mail_plugins(managesieve):
mail_plugin_dir(default): /usr/lib/dovecot/modules/imap
mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap
mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3
mail_plugin_dir(managesieve): /usr/lib/dovecot/modules/managesieve
imap_client_workarounds(default): outlook-idle delay-newmail
imap_client_workarounds(imap): outlook-idle delay-newmail
imap_client_workarounds(pop3):
imap_client_workarounds(managesieve):
pop3_enable_last(default): no
pop3_enable_last(imap): no
pop3_enable_last(pop3): yes
pop3_enable_last(managesieve): no
pop3_reuse_xuidl(default): no
pop3_reuse_xuidl(imap): no
pop3_reuse_xuidl(pop3): yes
pop3_reuse_xuidl(managesieve): no
pop3_save_uidl(default): no
pop3_save_uidl(imap): no
pop3_save_uidl(pop3): yes
pop3_save_uidl(managesieve): no
pop3_client_workarounds(default):
pop3_client_workarounds(imap):
pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
pop3_client_workarounds(managesieve):
lda:
  postmaster_address: root at mail.exampledomain.hu
  hostname: mail0.exampledomain.hu
  mail_plugins: quota sieve
  deliver_log_format: msgid=%m: From=<%f> %$
auth default:
  mechanisms: plain login
  default_realm: exampledomain.hu
  user: dovecot
  passdb:
    driver: sql
    args: /data/apps/dovecot/dovecot-mysql.conf
  userdb:
    driver: sql
    args: /data/apps/dovecot/dovecot-mysql.conf
  socket:
    type: listen
    client:
      path: /data/postfix/private/dovecot-auth-client
      mode: 438
      user: dovecot
      group: dovecot
    master:
      path: /var/run/dovecot/auth-master
      mode: 432
      user: dovecot
      group: dovecot
plugin:
  sieve: /data/mail/%d/%n/.sieve.dovecot
  sieve_dir: /data/mail/%d/%n
  quota: dict:User quota::proxy::quota
  quota_rule: *:storage=10GB
dict:
  quota: mysql:/data/apps/dovecot/dict-sql.conf

I didn't want to send it, because I don't know, which part is useful in 
this case.

> there are errors. http://wiki.dovecot.org/Logging
>   

Actually I've juest enabled all debugging related options, except 
password. I'm afraid, there will be too much messages.

> Anyway, the possible reasons:
>
> 1) Dovecot changed the UIDLs because something weird happened. In that
> case it logged an error.
>   

No error.

> 2) Did you use the courier migration script so that the UIDLs got
> converted to Dovecot? If not, maybe Outlook got confused because the
> UIDLs changed, and fixing it would require recreating the Outlook
> account or something..
>   

No, there was no conversation.
I was thinking about recreating the account, but it's not possible right 
now. It will be actual in 1-2 weeks.

Anyway, even if it help, there is an error, which does not happen all 
the time, still I think it's server related.

> 3) Outlook just doesn't like the new UIDLs and messes up itself. I think
> Courier usually uses maildir filenames as UIDLs, you could have kept
> doing that with pop3_uidl_format=%f. But changing it now would cause
> users to redownload everything again.. With v1.2.5+ you could use
> pop3_save_uidl=yes to make it possible to change UIDLs on the fly.
>   

Are you sure, it can be enabled on the fly and if I use it, the mail 
won't be donwload again after changing the uidl format?

Thank you,

tamas