[Dovecot] Outlook 2003 and Thunderbird IMAP + getting new headers

[Jan van den Berg]

Hi,

Here's the dovecot -n output:

# 1.1.3: /usr/local/dovecot/etc/imap-solcon.conf
base_dir: /var/run/imap-solcon/
syslog_facility: local7
protocols: imap
listen: *:143
ssl_disable: yes
disable_plaintext_auth: no
login_dir: /var/run/imap-solcon/login
login_executable: /usr/local/dovecot/libexec/dovecot/imap-login
login_greeting: Solcon MX.
login_process_per_connection: no
max_mail_processes: 1024
mail_location: maildir:/var/spool/mail/%1u/%1.1u/%u
mmap_disable: yes
mail_nfs_storage: yes
mail_nfs_index: yes
maildir_stat_dirs: yes
mail_executable: /usr/local/dovecot/libexec/dovecot/imap
mail_plugins: quota imap_quota
mail_plugin_dir: /usr/local/dovecot/lib/dovecot/imap
imap_client_workarounds: outlook-idle delay-newmail
auth default:
  mechanisms: plain digest-md5 cram-md5 login
  cache_size: 8192
  cache_negative_ttl: 0
  executable: /usr/local/dovecot/libexec/dovecot/dovecot-auth
  user: exim
  passdb:
    driver: sql
    args: /usr/local/dovecot/etc/imap-solcon-sql-auth.conf
  userdb:
    driver: prefetch
plugin:
  quota: maildir
  quota_rule2: Prullenbak:storage=25M

I am a bit hesitative for debugging on production I will try and see if can
set up some sort of test env. to debug.

Cheers,

Jan

-----Oorspronkelijk bericht-----
Van: Patrick Nagel [mailto:patrick.nagel at star-group.net] 
Verzonden: woensdag 10 september 2008 11:01
Aan: Jan van den Berg
CC: 'Dovecot Mailing List'
Onderwerp: Re: [Dovecot] Outlook 2003 and Thunderbird IMAP + getting new
headers

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Hi Jan,

Jan van den Berg wrote:
> We run 1.1.3 and I use Outlook to connect to my IMAP box and a couple of
> times per day (randomly) when I click certain folders IMAP will start
> retrieving ALL headers for that folder again ('retrieving new headers')!
> 
> I don't understand this. What triggers IMAP to do so, why not just
retrieve
> only the NEW headers?
> 
>  
> 
> Is it Dovecot or Outlook (probably) and what can be done about this? I
> already use the Dovecot Outlook workarounds.
> 
>  
> 
> I have also gotten word that this behavior happens with Thunderbird.
> 
>  
> 
> This is really a problem causing a lot of load on our storage (I am not
the
> only user).

Please give us some more information. Output of `dovecot -n` would be a good
start. Also check the logs for dovecot reporting problems (and/or switch on
debug logging).

Patrick.

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