IETF Logo Mail Archive

Re: Last Call: draft-klensin-rfc2821bis

Bill Manning <bmanning@ISI.EDU> Mon, 31 March 2008 14:57 UTC

Return-Path: <ietf-bounces@ietf.org>
X-Original-To: ietf-archive@megatron.ietf.org
Delivered-To: ietfarch-ietf-archive@core3.amsl.com
Received: from core3.amsl.com (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id 562D228C440; Mon, 31 Mar 2008 07:57:49 -0700 (PDT)
X-Original-To: ietf@core3.amsl.com
Delivered-To: ietf@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id DBB1128C44A for <ietf@core3.amsl.com>; Mon, 31 Mar 2008 07:57:41 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.599
X-Spam-Level:
X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id N0H7UAkb5BwD for <ietf@core3.amsl.com>; Mon, 31 Mar 2008 07:57:41 -0700 (PDT)
Received: from boreas.isi.edu (boreas.isi.edu [128.9.160.161]) by core3.amsl.com (Postfix) with ESMTP id 3330928C4A4 for <ietf@ietf.org>; Mon, 31 Mar 2008 07:57:41 -0700 (PDT)
Received: from boreas.isi.edu (localhost [127.0.0.1]) by boreas.isi.edu (8.13.8/8.13.8) with ESMTP id m2VEunYJ018275 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Mon, 31 Mar 2008 07:56:49 -0700 (PDT)
Received: (from bmanning@localhost) by boreas.isi.edu (8.13.8/8.13.8/Submit) id m2VEujMX018237; Mon, 31 Mar 2008 07:56:45 -0700 (PDT)
Date: Mon, 31 Mar 2008 07:56:45 -0700
From: Bill Manning <bmanning@ISI.EDU>
To: John C Klensin <john-ietf@jck.com>
Subject: Re: Last Call: draft-klensin-rfc2821bis
Message-ID: <20080331145645.GB10381@boreas.isi.edu>
References: <200803302336.m2UNaWpR079511@drugs.dv.isc.org> <637471AF06DFE582757B358D@[192.168.1.110]>
Mime-Version: 1.0
Content-Disposition: inline
In-Reply-To: <637471AF06DFE582757B358D@[192.168.1.110]>
User-Agent: Mutt/1.4.2.2i
X-ISI-4-43-8-MailScanner: Found to be clean
X-MailScanner-From: bmanning@boreas.isi.edu
Cc: Mark Andrews <Mark_Andrews@isc.org>, ietf@ietf.org
X-BeenThere: ietf@ietf.org
X-Mailman-Version: 2.1.9
Precedence: list
List-Id: IETF Discussion <ietf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=unsubscribe>
List-Post: <mailto:ietf@ietf.org>
List-Help: <mailto:ietf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=subscribe>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Sender: ietf-bounces@ietf.org
Errors-To: ietf-bounces@ietf.org

On Sun, Mar 30, 2008 at 11:53:37PM -0400, John C Klensin wrote:
> > 	It was obvious 20+ years ago that MX processing was broken
> > 	as there was no way to say "I don't want email".
> 
> First, it may have been obvious to you, but it wasn't obvious to 
> many of us.   In the general case, it still isn't.  But you 
> stated the situation exactly correctly.   "MX 0 ." means "I 
> don't want email".   "SRV 0 0 ." doesn't really indicate "no 
> service", it indicates "please do look for that service here".

	actually, it means the DNS admin doesn't want SMTP
	connections set to the indicated node.  

> While it is better than interpreting the lack of a bit in a WKS 
> record as "no service", it is still nothing more than an attempt 
> to use the DNS to say "please don't try a mail connection to 
> this domain".  

	right. 

--bill
Opinions expressed may not even be mine by the time you read them, and
certainly don't reflect those of any other entity (legal or otherwise).

_______________________________________________
IETF mailing list
IETF@ietf.org
https://www.ietf.org/mailman/listinfo/ietf

v2.23.0 | Report a Bug | By Email