[CentOS] Re: Timeout when downloading messages

Scott Silva ssilva at sgvwater.com
Thu Mar 30 17:03:35 UTC 2006

spart cus spake the following on 3/29/2006 10:07 PM:
> */Scott Silva <ssilva at sgvwater.com>/* wrote:
>     spart cus spake the following on 3/28/2006 6:38 PM:
>     > Hi To All Gurus,
>     > Im encountering some problems on my mailserver. When my clients are
>     > downloading their emails, when they reach around 15 mails downloaded
>     > somehow the connection stops. Im using Centos4.2, Postfix and Dovecot.
>     > Any one experiece these ?
>     >
>     Try and increase the timeouts for the clients.
>     Are you using Outlook on the clients?
>     There are some workarounds for outlook in Dovecot.
> Yes some of my clients uses outlook.
>  When i check rpm -qa|grep dovecot, it says dovecot-0.99.11-2.EL4.1, 
> so it means it uses .99 version.But when i check the dovecot.conf , at 
>  the beginning of the file
>  ## Dovecot 1.0 configuration file
>  with this on the
>  file
>  # outlook-pop3-no-nuls
> #client_workarounds =
> client_workarounds = outlook-pop3-no-nuls
> should i use this one ? and what does this config actually do so that i could
> explain to them the erros.
> thanks.

#   outlook-pop3-no-nuls:
#     Outlook and Outlook Express hang if mails contain NUL characters.
#     This setting replaces them with 0x80 character.

It isn't exactly .99 it is .99 with the famous RedHat backporting of fixes, so
it is somewhere between .99 stable and whatever 1.0 beta that they ported
from. If you look in the stock config file, it is very well commented. I
haven't enabled any workarounds, and haven't had any complaints since the
initial migration and duplicated messages, but you can experiment with
outlook_idle and outlook-pop3-no-nuls. Make sure that the locking is the same
as your MUA and delivery agent. In CentOS 4 it should be fcntl.
In CentOS 3 I think it should be flock, but don't hold me to it.


MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!

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