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Date:      Mon, 23 Nov 1998 14:01:40 -0500
From:      Chris Johnson <cjohnson@palomine.net>
To:        Ben Smithurst <ben@scientia.demon.co.uk>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Fwd: Undeliverable: Re: The message was delivered with a warning.
Message-ID:  <19981123140140.A26843@palomine.net>
In-Reply-To: <19981123122629.A8841@scientia.demon.co.uk>; from Ben Smithurst on Mon, Nov 23, 1998 at 12:26:29PM %2B0000
References:  <3659242C.22AA2D3A@uk.radan.com> <19981123122629.A8841@scientia.demon.co.uk>

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On Mon, Nov 23, 1998 at 12:26:29PM +0000, Ben Smithurst wrote:
> Mark Ovens wrote:
> 
> > >     MSEXCH:MSExchangeMTA:ChesserHouse:MAILSRV1
> >              ^^^^^^^^^^
> > Kind of illustrates the IQ of those responsible.
> 
> As does this, from my server's reject log:
> 
> 1998-11-23 12:01:14 0zhug5-0002BZ-00 rejected from punt-11.mail.demon.net [194.217.242.34]: no valid sender in message headers: return path is <>
> Recipients: ben@scientia.demon.co.uk
> 
> Shit, they can't even get a valid address in the headers of bounce
> messages, so I doubt they'll ever stop this MIMESweeper crap.

The envelope sender of a bounce message is supposed to be blank (i.e "return
path is <>"). If your mail server rejects messages because of a blank envelope,
it's misconfigured (RFC 1123, 5.2.9). Or perhaps I misunderstand what you're
saying.

Chris

> 
> P Received: from punt-11.mail.demon.net ([194.217.242.34])
> 	by scientia.demon.co.uk with smtp (Exim 2.053 #18)
> 	id 0zhug5-0002BZ-00 for ben@scientia.demon.co.uk;
> 	Mon, 23 Nov 1998 12:01:14 +0000
> P Received: from punt-1.mail.demon.net by mailstore for ben@scientia.demon.co.uk
>           id 911822380:10:10458:8; Mon, 23 Nov 98 11:59:40 GMT
> P Received: from pat.edin.org ([193.36.232.3]) by punt-1.mail.demon.net
>            id aa1122464; 23 Nov 98 11:59 GMT
> P Received: from MAILSRV1 (exchange.edin.org [193.36.232.4])
> 	by edin.org (8.9.1/8.9.1) with ESMTP id LAA19864
> 	for <ben@scientia.demon.co.uk>; Mon, 23 Nov 1998 11:59:22 GMT
> P Received: by mailsrv1.ch.educ.edin.gov.uk with Internet Mail Service (5.5.2232.9)
> 	id <X1LHP9VS>; Mon, 23 Nov 1998 11:59:16 -0000
> I Message-ID: <D55FCDA24637D21182C700A0C9E1205C1AF854@mailsrv1.ch.educ.edin.gov.uk>
> F From: System Administrator <postmaster@edin.sch.uk>
> T To: ben@scientia.demon.co.uk
>   Subject: Undeliverable: Re: The message was delivered with a warning.
>   Date: Mon, 23 Nov 1998 11:59:14 -0000
>   MIME-Version: 1.0
>   X-Mailer: Internet Mail Service (5.5.2232.9)
>   Content-Type: multipart/mixed;
> 	boundary="----_=_NextPart_000_01BE16D8.B165E1C6"
> 
> -- 
> Ben Smithurst
> ben@scientia.demon.co.uk
> 
> send a blank message to ben+pgp@scientia.demon.co.uk for PGP key
> 
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