[Dovecot] Best configuration of dovecot for limit Outlook problems with IMAP

[Adam McDougall]

Recently I encountered a situation where Outlook Express was giving me a 
similar error, although it was only on certain emails.  It started when 
I tried to tell Outlook Express to synchronize less than 'All messages' 
and I must have used 'New headers' or something instead.  Switching it 
back to 'All messages' made it continue to download the entire body + 
headers of new mail, but they were accessible.  For the messages that 
were inaccessible,
to regain access I had to select them, right click the selection, click 
"Move to Folder", and select the Inbox under the same mail server, then 
Click "Send/Recv" and the fixed messages would appear. 

Alessio Cecchi wrote:
> Hi,
>
> in some installation where users using IMAP and Outlook Express I have some 
> problems.
>
> Outolook randomly presents problems in messages retrieving, for example:
>
> "Outlook Express is unable to retrieve the requested message because the 
> server no longer has the message available.... server response: Fecth 
> Completed"
>
> or
>
> "Message could not be displayed" error message when I try to view an Outlook 
> Express e-mail message
>
> I'm using dovecot 1.1.4 with qmail and vpopmail.
>
> This is my dovecot configure options:
>
> ./configure --prefix=/usr --sysconfdir=/etc/dovecot --localstatedir=/var --with-ssldir=/etc/ssl
>
> and this my dovecot config:
>
> # dovecot -n
> # 1.1.4: /etc/dovecot/dovecot.conf
> log_path: /var/log/dovecot/dovecot-err.log
> info_log_path: /var/log/dovecot/dovecot.log
> ssl_cert_file: /etc/apache2/ssl/comun.crt
> ssl_key_file: /etc/apache2/ssl/comun.key
> disable_plaintext_auth: no
> login_dir: /var/run/dovecot/login
> login_executable: /usr/libexec/dovecot/imap-login
> login_greeting: Ready
> login_process_per_connection: no
> first_valid_uid: 89
> last_valid_uid: 89
> first_valid_gid: 89
> last_valid_gid: 89
> mail_uid: 89
> mail_gid: 89
> mail_location: maildir:~/Maildir
> mail_debug: yes
> mail_plugins: quota imap_quota
> imap_client_workarounds: outlook-idle delay-newmail
> namespace:
>   type: private
>   separator: .
>   prefix: INBOX.
>   inbox: yes
>   list: yes
>   subscriptions: yes
> auth default:
>   verbose: yes
>   debug: yes
>   passdb:
>     driver: checkpassword
>     args: /home/vpopmail/bin/vchkpw
>   userdb:
>     driver: prefetch
>     args: uid=89 gid=89 home=/home/vpopmail/domains/%d/%u
> plugin:
>   quota: maildir
>
> What further changes to the configuration of dovecot could I do?
> 	
> Do you have other suggestions?
>
> Thanks
>