dovecot - Jan 2005 - Extremely Slow Pop3 Downloads, Evolution 2.0.2

Hello All,

We've been running Dovecot for imap for quite some time and have had little
trouble with it. However, we recently switched over to using dovecot for
pop3 because of simplicity as well as security issues with the older UW
based pop server.

I've noticed one serious problem. The only client that seems to have any
issue at all with the server is Evolution. In pop3 mode, it takes a minute
or more to download a few messages on an inbox with 400+ saved messages in
it over gigabit ethernet. Over a DSL connection using MS Outlook 2k3 it
takes about a minute total for all messages. Similarly with KMail it takes
about 5-10 seconds to download all messages in the pop3 box.

The messages trickle in with evolution 2.x, I've tried 2.0.0, 2.0.1, and
2.0.2 and all have this problem. I haven't tried the 1.x series as I
don't
have any linux boxes that old available to test.

So apparently, there's two things of concern.

1. The server is definitely fast enough to handle the large mail box.
2. There's some serious incompatibility in Evolution/Dovecot causing for the
14.4 modem email download speeds over lan.

We're running Dovecot 0.99.12 on Debian unstable, however 0.99.11 exhibited
this behavior as well. If anyone has some hints, I'd greatly appreciate it.
It's annoying having to wait 5-10 min to download mail in the morning when
one gets into work ;)

If there's any other information I can provide, please ask.

Thanks to whichever kind soul finds time to trudge through this problem with
us.

Michael D. Joy
HEP - University of Mississippi
mdjoy at phy.olemiss.edu

On Sat, 8 Jan 2005, Michael Joy wrote:
> We're running Dovecot 0.99.12 on Debian unstable, however 0.99.11
exhibited
> this behavior as well. If anyone has some hints, I'd greatly appreciate
it.
> It's annoying having to wait 5-10 min to download mail in the morning
when
> one gets into work ;)
>
Btw, I've uploaded 0.99.13 now so you might want to try that.  Especially
as the changelog includes:

        + Workaround for some POP3 client bugs: if message doesn't contain
the
          "end of headers" empty line, add it automatically.

-- 
Jaldhar H. Vyas <jaldhar at debian.org>
La Salle Debain - http://www.braincells.com/debian/

On Sat, 2005-01-08 at 14:56 -0600, Michael Joy wrote:
> We've been running Dovecot for imap for quite some time and have had
little
> trouble with it. However, we recently switched over to using dovecot for
> pop3 because of simplicity as well as security issues with the older UW
> based pop server.
Dovecot 0.99.x isn't very good or fast POP3 server. 1.0-tests are a
_lot_ faster. 0.99.x actually locks/unlocks the mbox file separately for
each mail that is read.
> 1. The server is definitely fast enough to handle the large mail box.
> 2. There's some serious incompatibility in Evolution/Dovecot causing
for the
> 14.4 modem email download speeds over lan.
Look at the network traffic between Dovecot and Evolution. Does it pause
somewhere for a long time?
> We're running Dovecot 0.99.12 on Debian unstable, however 0.99.11
exhibited
> this behavior as well. If anyone has some hints, I'd greatly appreciate
it.
> It's annoying having to wait 5-10 min to download mail in the morning
when
> one gets into work ;)
It may be an authentication problem, Dovecot advertised AUTH=PLAIN but
if client actually tried to use it it didn't work correctly. 0.99.13
fixed this. Maybe it helps.

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