[Dovecot] Outlook 2010 very slow when using IMAP - are there any tweaks?

[Mailing List SVR]

Il 02/07/2012 16:34, Kaya Saman ha scritto:
> Hi,
>
> though this is a bit of a side question, has anybody had an issue
> while running Outlook 2010 with Dovecot?
>
> The reason why I am asking is that I have setup a Dovecot 2.1.7 server
> on FreeBSD which works fantastically with Thunderbird but Outlook
> seems to be twice as slow in transferring information across??
>
>
> # dovecot -n
> # 2.1.7: /usr/local/etc/dovecot/dovecot.conf
> # OS: FreeBSD 8.2-RELEASE amd64
> auth_debug = yes
> auth_mechanisms = plain ntlm login
> auth_use_winbind = yes
> auth_username_format = %n
> auth_verbose = yes
> auth_winbind_helper_path = /usr/local/bin/ntlm_auth
> disable_plaintext_auth = no
> info_log_path = /var/log/dovecot-info.log
> log_path = /var/log/dovecot.log
> mail_gid = mail_user
> mail_home = /mail/AD_Mail/%Ld/%Ln
> mail_location = maildir:~/Maildir
> mail_uid = mail_user
> passdb {
>    args = failure_show_msg=yes
>    driver = pam
> }
> pop3_fast_size_lookups = yes
> pop3_lock_session = yes
> pop3_no_flag_updates = yes
> protocols = imap pop3
> ssl = no
> userdb {
>    driver = static
> }
>
>
>
>
> Since (like most corporate organizations out there) we solely run
> Outlook coupled to Exchange, this excersize was meant to be a way of
> getting rid of PST files. We don't run out own Exchange however, and
> don't have any control over it either.
>
>
> My workaround was to simply use the Outlook GUI space to transfer
> emails between Exchange and Dovecot running the IMAPv4 protocol.
>
>
> For whatever reason Outlook is being really garbage about dealing with
> stuff and since I don't know Outlook or MS products very well (being
> your typical average OpenSource guy) I was wondering if there were any
> tweaks that could be made within Outlook to speed it up or in Dovecot
> to work better with Outlook?
>
>
> I guess one could get sidetracked into the argument of mdbox vs.
> Maildir from my config however, Thunderbird is really fast and
> transfers large amounts of data really easily. Reaches round 130Mbps
> using nload performance grapher, while Outlook only manages ~50kbps
> but spikes at 2-3Mbps on occassion.

Try to understand (from dovecot logs) if there are difference between 
outlook and thunderbird, for example outlook connect over ssl and 
thunderbird no ecc..

Nicola

>
>
> Can anyone offer any guidence or assistance in this matter??
>
>
> Actually wherever I run Dovecot, including my servers at home, it is
> fast and reliable. Yes I know MS is the polar opposite of anything
> worth using however, my company won't change and I'm stuck banging my
> head against the wall while trying to get MS to interface with
> ANYTHING.....
>
>
> Regards,
>
>
> Kaya
>