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Re: qmail-send nearly stops delivery

To: qmail@list.cr.yp.to
Subject: Re: qmail-send nearly stops delivery
From: Jeremy Kitchen <kitchen@scriptkitchen.com>
Date: Fri, 25 May 2007 16:48:23 -0400
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On Fri, May 25, 2007 at 05:54:40PM +0200, Matthias Jambor wrote:
> dear list,
> 
> we experience problems with one of our qmail-servers since a few days.
> It is a normal qmail-installation with the spamcontrol-patch. It delivers
> mail to the local vpopmail-server or to external mailserver per smtproute.
> 
> Sometimes qmail-send nearly stops delivery. The queue grows until a few
> thousands of mails are waiting to be done.
> At first we configured an default smtproute to an external relay-server.
> Then we installed bind (i know, tinydns would be better) for faster name
> resolution.
> Both did not helped.
> Then we reduced concurrencyincoming from 200 to 10-25. After that qmail-send
> deliverd the mails so that the queue decreased to a normal value.
> Starting or stopping qmail gave no improvement. Neither did force delivery
> (tcpok, kill -ALRM qmail-send).

ok, we need a little more information from you then.

Please post the full, unedited output of qmail-showctl.

Also, when your queue starts growing, when you notice a problem
starting, run 'qmail-qstat' and post the output for us.

Also, when it's happening, grab us a sample of the qmail-send logs while
it's happening making especially sure to grab the status: lines, they
are the part we're after.

then, post that all to the list so we can see it.  I have a feeling I
already know what the problem is, but need a little more information
before I can be sure :)

-Jeremy

-- 
Jeremy Kitchen ++ kitchen@scriptkitchen.com

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