RE: uncooperative DNSBLs, IETF misinformation (was: several messages)
<michael.dillon@bt.com> Fri, 14 November 2008 18:59 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 [127.0.0.1] (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id ACE783A69EC; Fri, 14 Nov 2008 10:59:46 -0800 (PST)
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 2318A3A69EC for <ietf@core3.amsl.com>; Fri, 14 Nov 2008 10:59:45 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.532
X-Spam-Level:
X-Spam-Status: No, score=-3.532 tagged_above=-999 required=5 tests=[AWL=0.067, BAYES_00=-2.599, RCVD_IN_DNSWL_LOW=-1]
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 W7PdGlPlwvmp for <ietf@core3.amsl.com>; Fri, 14 Nov 2008 10:59:44 -0800 (PST)
Received: from smtp1.smtp.bt.com (smtp1.smtp.bt.com [217.32.164.137]) by core3.amsl.com (Postfix) with ESMTP id 07E5C3A69E0 for <ietf@ietf.org>; Fri, 14 Nov 2008 10:59:43 -0800 (PST)
Received: from E03MVZ2-UKDY.domain1.systemhost.net ([193.113.30.61]) by smtp1.smtp.bt.com with Microsoft SMTPSVC(6.0.3790.1830); Fri, 14 Nov 2008 18:59:41 +0000
X-MimeOLE: Produced By Microsoft Exchange V6.5
Content-class: urn:content-classes:message
MIME-Version: 1.0
Subject: RE: uncooperative DNSBLs, IETF misinformation (was: several messages)
Date: Fri, 14 Nov 2008 18:59:01 -0000
Message-ID: <C0F2465B4F386241A58321C884AC7ECC0961B8DB@E03MVZ2-UKDY.domain1.systemhost.net>
In-Reply-To: <e0c581530811140931t23f85aa9w9629a8aa2bc9f26@mail.gmail.com>
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
thread-topic: uncooperative DNSBLs, IETF misinformation (was: several messages)
Thread-Index: AclGftyXrrk1ihqNRaubgZHNQozO8QACZpxw
From: michael.dillon@bt.com
To: ietf@ietf.org
X-OriginalArrivalTime: 14 Nov 2008 18:59:41.0102 (UTC) FILETIME=[26235CE0:01C9468B]
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
> > This still breaks deliverability. > > How? A user writes an email and sends it to another user. The other user does not receive the email. This means that deliverability is broken. The DNSBL is an agent in preventing that delivery. To my mind, this deserves some explicit discussion in the Security Considerations section. On one hand, a misused DNSBL can wreak havoc, and on the other hand a compromised DNSBL could block more email than an administrator wishes. The draft presented by the ASRG was very weak in its discussion of security considerations given the fact that a DNSBL is explicitly designed to break email deliverability. > > There is a diagram under Rights of a Sender vs Rights of a Receiver > > which shows that the DNSBL modifies the behavior of the > Receiving mail > > server. This is what I mean by "sitting in the middle of an > end-to-end > > (sender to recipient) email transaction. > > At the desire of the receiving mail site's administrator. That is irrelevant. The fact is that it does sit in the middle and the implications of this should be clearly documented. > And is not unique to DNSBLs. Any sort of spam filtering > modifies the behavior of the receiving mail server. But that would be a topic for another RFC which should also have a substantial Security Considerations section. There are a number of reasons to document something in a standards document. One is to help people build compatible implementations of a protocol. Another is to help operators of the protocol interoperate. But it is also to provide a clear description of the protocol so that others can improve on it in the future, or replace it entirely with a superior architecture. --Michael Dillon _______________________________________________ Ietf mailing list Ietf@ietf.org https://www.ietf.org/mailman/listinfo/ietf
- Re: several messages der Mouse
- Re: several messages David Morris
- Re: several messages Dean Anderson
- Re: several messages Randy Presuhn
- Re: several messages David Morris
- Re: several messages Matthias Leisi
- Re: several messages Steve Linford
- Re: several messages Peter Dambier
- Re: several messages Steve Linford
- Re: several messages Keith Moore
- Re: several messages der Mouse
- Re: several messages Chris Lewis
- Re: several messages Mark Andrews
- Re: several messages der Mouse
- Re: several messages Chris Lewis
- Re: several messages David Romerstein
- Re: several messages Randy Presuhn
- Re: several messages Chris Lewis
- Re: several messages David Romerstein
- Re: several messages David Romerstein
- Re: several messages Keith Moore
- Re: several messages Chris Lewis
- Re: several messages Al Iverson
- More anti-spam (was: Re: several messages) John C Klensin
- RE: several messages michael.dillon
- Re: several messages Matthias Leisi
- Re: several messages Mark Andrews
- Re: several messages David Morris
- Re: several messages Al Iverson
- Re: uncooperative DNSBLs, was several messages John Levine
- Re: uncooperative DNSBLs, was several messages Jim Hill
- Re: several messages John C Klensin
- Re: several messages Al Iverson
- RE: several messages Hallam-Baker, Phillip
- Re: uncooperative DNSBLs, was several messages Matthias Leisi
- Re: uncooperative DNSBLs, was several messages Al Iverson
- RE: several messages Anthony Purcell
- Re: uncooperative DNSBLs, was several messages Dave CROCKER
- Re: several messages der Mouse
- Re: uncooperative DNSBLs, was several messages Andrew Sullivan
- Re: uncooperative DNSBLs, was several messages David Romerstein
- Re: uncooperative DNSBLs, was several messages Jim Hill
- Re: several messages Chris Lewis
- Re: uncooperative DNSBLs, was several messages Chris Lewis
- Re: uncooperative DNSBLs, was several messages John C Klensin
- Re: uncooperative DNSBLs, was several messages Dave CROCKER
- Re: uncooperative DNSBLs, was several messages Tony Finch
- Re: uncooperative DNSBLs, was several messages Andrew Sullivan
- Re: uncooperative DNSBLs, was several messages John C Klensin
- Re: uncooperative DNSBLs, was several messages Matthias Leisi
- Re: uncooperative DNSBLs, was several messages Al Iverson
- Re: uncooperative DNSBLs, was several messages Andrew Sullivan
- Re: uncooperative DNSBLs, was several messages John C Klensin
- Re: uncooperative DNSBLs, was several messages Ted Hardie
- Re: uncooperative DNSBLs, was several messages Matthias Leisi
- Re: uncooperative DNSBLs, was several messages Ted Hardie
- Re: uncooperative DNSBLs, was several messages Tony Finch
- Context specific semantics was Re: uncooperative … Ted Hardie
- Clarifying harm to DNS (was: uncooperative DNSBLs… Andrew Sullivan
- Re: Context specific semantics was Re: uncooperat… Ted Hardie
- Re: uncooperative DNSBLs, IETF misinformation (wa… Steve Linford
- RE: Context specific semantics was Re: uncooperat… Hallam-Baker, Phillip
- Re: uncooperative DNSBLs, was several messages Peter Dambier
- Re: uncooperative DNSBLs, was several messages David Romerstein
- Re: uncooperative DNSBLs, was several messages Peter Dambier
- Re: uncooperative DNSBLs, was several messages Keith Moore
- Re: uncooperative DNSBLs, was several messages Chris Lewis
- RE: uncooperative DNSBLs, IETF misinformation (wa… michael.dillon
- Re: uncooperative DNSBLs, IETF misinformation (wa… Steve Linford
- RE: uncooperative DNSBLs, IETF misinformation (wa… michael.dillon
- Re: Context specific semantics was Re: uncooperat… Tony Finch
- Re: Context specific semantics was Re: uncooperat… John Levine
- RE: Context specific semantics was Re: uncooperat… Hardie, Ted
- RE: Context specific semantics was Re: uncooperat… Tony Finch
- Re: several messages Rich Kulawiec
- Re: uncooperative DNSBLs, was several messages Rich Kulawiec
- Re: uncooperative DNSBLs, IETF misinformation (wa… Al Iverson
- Re: Context specific semantics was Re: uncooperat… Ted Hardie
- RE: Context specific semantics was Re: uncooperat… Ted Hardie
- Re: several messages John C Klensin
- Re: several messages Al Iverson
- Re: Context specific semantics was Re: uncooperat… John L
- RE: uncooperative DNSBLs, IETF misinformation (wa… michael.dillon
- Re: uncooperative DNSBLs, IETF misinformation (wa… Al Iverson
- RE: uncooperative DNSBLs, IETF misinformation (wa… michael.dillon
- Re: several messages John C Klensin
- Re: several messages Chris Lewis
- Re: uncooperative DNSBLs, IETF misinformation (wa… Keith Moore
- Re: several messages Al Iverson
- RE: several messages michael.dillon
- Re: uncooperative DNSBLs, IETF misinformation (wa… Al Iverson
- Re: Context specific semantics was Re: uncooperat… Ted Hardie
- Re: Context specific semantics was Re: uncooperat… Douglas Otis
- Re: uncooperative DNSBLs, IETF misinformation (wa… Theodore Tso
- Re: Context specific semantics was Re: uncooperat… Theodore Tso
- Re: uncooperative DNSBLs, IETF misinformation (wa… Chris Lewis
- Re: more bad ideas, was uncooperative DNSBLs, was… John Levine
- Re: more bad ideas, was uncooperative DNSBLs, was… Chris Lewis
- Re: Context specific semantics was Re: uncooperat… John L
- Detecting and disabling bad DNSBLs Peter Dambier
- Re: Detecting and disabling bad DNSBLs Steve Linford
- Re: several messages Pekka Savola
- Re: more bad ideas, was uncooperative DNSBLs, was… Keith Moore
- Re: several messages Rich Kulawiec
- Is USA qualified for 2.3 of draft-palet-ietf-meet… YAO
- RE: [73attendees] Is USA qualified for 2.3 ofdraf… Song Haibin
- Re: several messages Tom.Petch
- Re: [73attendees] Is USA qualified for 2.3 of dra… Phillip Hallam-Baker
- Re: [73attendees] Is USA qualified for 2.3 of dra… james woodyatt
- Re: several messages John C Klensin