csuite and multiple emails

Date: Thu, 1 Jul 1999 14:20:43 -0300 (ADT)
From: Dave Wile <aa075@cobequidnet.ns.ca>
To: Michael Smith <michael@csuite.ns.ca>
cc: don.mackill@iname.com, csuite-tech@chebucto.ns.ca
Precedence: bulk
Return-Path: <csuite-tech-mml-owner@chebucto.ns.ca>

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Hello, unfortunately I had never received the root@cobequidnet.ns.ca
message as someone else apparently has the root account's mail forwarded
to his mailbox. Thanks for reposting it Michael and thanks for the follow
up on it Don Mackill. I made the changes and we will just have to see if
it fixes the problem, so far it is good but of course this is just about 5
minutes after the first test message. I hope that I don't see this for
another 20 or so times. ;-)
Dave


On Thu, 1 Jul 1999, Michael Smith wrote:

> <cranky=off> (ok, now I've got some sleep behind me ;)
> 
> On Thu, 1 Jul 1999 don.mackill@iname.com wrote:
> 
> > Dave Wile forwarded a message to me subjected, "How zmailer does its
> > thing..." that he received from you in response to his question.  Maybe I am
> > missing something but I can't find a solution to our problem from that
> > posting.  Is there anything else you can do for us?
> 
> Last Saturday I sent a message to root@cobequidnet.ns.ca with instructions
> for fixing this problem. Here it is:
> 
> Date: Sat, 26 Jun 1999 17:06:33 -0300 (ADT)
> From: Michael Smith <michael@csuite.ns.ca>
> To: root@cnet.windsor.ns.ca, root@pgfn.bc.ca, root@cobequidnet.ns.ca
> cc: root@chebucto.ns.ca
> Subject: IMPORTANT: ZMailer smtpserver bug
> 
> I found messages destined for the following hosts in our queue:
> 
> wwhcn.cnet.windsor.ns.ca
> strider.pgfn.bc.ca
> cobequidnet.ns.ca
> 
> Mostly people who are on Chebucto mailing lists, and probably getting
> hammered by mail from our system. We upgraded our ZMailer yesterday to the
> latest minor release, which exposes a CHUNKING bug in the version you're
> all running, 2.99.48. Instructions for the workaround are below.
> 
> I'm sending this from my home system, so you won't get 400 copies of this
> ;)
> 
> ---------- Forwarded message ----------
> Date: Sat, 26 Jun 1999 16:53:55 -0300 (ADT)
> From: Michael Smith <michael@csuite.ns.ca>
> To: Ryan Alexander Neily <aa033@wwhcn.cnet.windsor.ns.ca>
> Cc: team tech <techteam@chebucto.ns.ca>
> Subject: Re: your mail
> 
> On Sat, 26 Jun 1999, Ryan Alexander Neily wrote:
> 
> >    As an onlooker from Windsor WHCN cnet, I am just mentioning that I 
> > have received about 400 emails today. This maybe has something to do
> with 
> > the zmailer upgrade? I'm not complaining, mind you, as I suppose you are 
> > having enough difficulties. Good luck,
> 
> There's a bug in the smtpserver for your version of ZMailer. We had this
> problem one of our own machines a couple weeks back.
> 
> Your smtpserver is sending CHUNKING in its greeting code. CHUNKING is a
> feature of ESMTP for sending messages faster, but it's broken in your
> version of smtpserver. The way it's broken happens to make new ZMailers
> think it's hanging up on them and not receiving the messages, so they get
> retried over and over again.
> 
> The work around is to kill the smtpserver
> (/var/csuite/etc/mail/bin/zmailer kill smtpserver)
> then edit the smtpserver binary in binary mode
> (vi -b /var/csuite/etc/mail/bin/smtpserver)
> then search for CHUNKING
> (<forward slash>CHUNKING<ENTER>)
> then replace the C with an X
> (rX<ESCAPE>)
> then save & quit
> (ZZ)
> then restart smtpserver.
> (/var/csuite/etc/mail/bin/zmailer smtpserver
> 
> Michael
> 

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