From: Ralf Hildebrandt (Ralf.Hildebrandtcharite.de)
Date: Mon Jul 03 2006 - 03:10:55 CDT

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* Robert Felber <r.felberek-muc.de>:
> On Mon, Jul 03, 2006 at 09:49:28AM +0200, Pascal Maes wrote:
> > germany2.chiltern.com[217.7.78.26]; from=<sebastien.ducarmechiltern.com>
> > to=<pascal.maesuclouvain.be> proto=ESMTP helo=<german1.chiltern.com>
>
> If testing, then with germany1.chiltern.com
>
> > We have try with telnet on port 25 and it works... Not easy because they have
> > a windows system and they can't see what they type so we got a lot of typo
> > errors.
> >
> > But when they send a message with their mail client, they got the same error
> > than before.
> > They will contact their "head system manager" to ask some questions...
>
> Just let a tcpdump -X -s0 -n host 217.7.78.26 > debug.log 2>&1 run when they
> try to deliver mail (if neccessary with the right -i option).
>
> You will then see, to which port they try to deliver and whats going on until
> HELO.

A simple
debug_peer_list = 217.7.78.26
followed by "postfix reload" will aslo suffice

--
Ralf Hildebrandt (Ralf.Hildebrandtcharite.de) spamtrapcharite.de
Postfix - Einrichtung, Betrieb und Wartung Tel. +49 (0)30-450 570-155
http://www.postfix-buch.com
If at first you don't succeed, destroy all evidence that you tried.

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