Re: [cobalt-users] Slow POP3 response on Raq4

["Jim Scott" <cobaltlist@xxxxxxxxxxxx>]

I believe the RaQ4 uses Qpopper as the pop3 server. You can disable reverse
lookup and it will likely resolve your problem.

Here is the text from Qpopper website:
Normally, Qpopper attempts a reverse-lookup on the client IP address when a
connection is made.  You can prevent this by using the -R command-line or
the reverse-lookups configuration file option.
When this is done, the log file repeats the client IP address twice, instead
of the canonical name following the IP address.

You might want to do this on systems that have a high load, to avoid the
overhead of the DNS lookups.  You might also want to do this if the
information is simply not useful or desired.

Do do the -R go to inetd.conf and look for a line like this and add -R like
so
pop-3   stream  tcp     nowait  root    /usr/sbin/tcpd  in.qpopper -R

Then restart inet by doing a /etc/rc.d/init.d/inet stop
then /etc/rc.d/init.d/inet start

Then check email via POP and verify in your /var/log/maillog file that the
lines for POP session just show the IP and not the DNS for that IP.

That should fix it.

Jim




----- Original Message -----
From: "Gerald Waugh" <gerald@xxxxxxxxx>
To: <cobalt-users@xxxxxxxxxxxxxxx>
Sent: Tuesday, January 15, 2002 6:07 AM
Subject: Re: [cobalt-users] Slow POP3 response on Raq4


> On Tue, 15 Jan 2002, Ryan wrote:
> > I am currently running a RAQ4r.  I have about 50 domains that are housed
on
> > the server.  Several are email only domains, with two of them being
pretty
> > intense in the amounts of email they send and receive.  I have several
> > domains that are complaining of slow response time from the server in
> > checking email.  At first I thought it was the connection comign into
our
> > network that as giving them problems, but since I have tested the mail
> > response from within our network and it takes anywhere from 5-30 seconds
for
> > the server to respond at all.  I watched the logs to see when a session
was
> > established and it corresponds to the email client response.  The funny
> > thing is that I have tested some of the other domains on there and I get
a
> > very fast response (.5-3 seconds).  I can check mail at the sametime
with
> > both domaisn and one gets nice response and the other gets very slow
> > response.
> >
>
> DNS, the client's reverse is not working,
> causes name resolution to timeout, takes 25 seconds or so.
>
> --
> Gerald Waugh
> Registered Linux User 255245
> register at http://counter.li.org
>
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