New development.. what's even more strange about this is that it is
primarily happening on one server in the cluster and not the others.
All of which have identical mysql configs, with the exception of their
ID in the cluster, vpopmail and qmail installations. 

-----Original Message-----
From: Ken Jones [mailto:[EMAIL PROTECTED] 
Sent: Thursday, September 22, 2005 10:09 AM
Subject: Re: [vchkpw] intermittent smtp auth errors

Clayton Weise wrote:
> I've got an odd error that is coming up and I can't quite put my
> on it.  I have 3 mail servers running qmail/vpopmail (5.4.10) and
> 3.23.58.  I also have mysql replication running and vpopmail is
> configured in accordance with that (reads on localhost, writes on the
> server).  We've been receiving complaints from customers about
> intermittent smtp errors and when I tail the maillog I'm seeing errors
> like this:
> Sep 22 08:58:37 qmail1 vpopmail[64930]: vchkpw-smtp: vpopmail user not
> Sep 22 08:58:39 qmail1 vpopmail[64995]: vchkpw-smtp: vpopmail user not
> Sep 22 08:58:40 qmail1 vpopmail[65022]: vchkpw-smtp: vpopmail user not
> In the interest of our users' privacy I have replaced the various
> & ip addresses with the [EMAIL PROTECTED] and  What's strange is that
> it's not happening with any other authentication method (pop3, imap,
> etc), only smtp.  It fails out saying "user not found" and yet a
> 'vuserinfo' on that user reveals they actually do exist.  I have qmail
> patched with the smtp auth patch from:
> I'm happy to provide any other information that might be helpful in
> figuring this out.  Any suggestions are, of course, welcomed.

You might be running out of mysql connections.
Check your my.cnf file for
max_connections variable.

The default value is 100 connections. You'll need the
max_connections to cover your max smtp, imap, pop3
local concurrency and any other services that connect
to the mysql database.

Hope that helps,
Ken Jones

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