IETF Logo Mail Archive

Re: [dmarc-ietf] WGLC ARC-16 concern on Section 5.1.2 - cv=fail should sign greedily

Dave Crocker <dcrocker@gmail.com> Wed, 15 August 2018 19:02 UTC

Return-Path: <dcrocker@gmail.com>
X-Original-To: dmarc@ietfa.amsl.com
Delivered-To: dmarc@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F28C01310F1 for <dmarc@ietfa.amsl.com>; Wed, 15 Aug 2018 12:02:04 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.999
X-Spam-Level:
X-Spam-Status: No, score=-1.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MLLRGjADYQxb for <dmarc@ietfa.amsl.com>; Wed, 15 Aug 2018 12:02:02 -0700 (PDT)
Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2117313109F for <dmarc@ietf.org>; Wed, 15 Aug 2018 12:01:51 -0700 (PDT)
Received: by mail-pg1-x52f.google.com with SMTP id r1-v6so883328pgp.11 for <dmarc@ietf.org>; Wed, 15 Aug 2018 12:01:51 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=DxssPzZOAKuPVZSI/ZX7zgw98pMT0Qq+YgRH1wQe3yQ=; b=XO934sllNiQbkVYlhktCDAHrm+6T/G1hCUsVmZhAJFYb6dysEx/wZpTInlp7LSvyTS splcOrRM5mNS5tsjQpkhEg+Z3JhCm+ljUpFvddWFekK5mTMECrqhHUky65oUqADfyecN GeNqsU3rxZ8LegAPzVu+LDG8K57WJANqDtVOVLNLZF+Q9mZmpKTSdAtfYUex41G+WKw1 fBOipJ5iWzwN1DBGxLGY8/S2d/hIjWJf95rmU3eZ+DazbgGDw0ba9i5LdWS++0t8hA6N osoNeYo1xAs1CN2FgksrjqMFI3CA5OXQCUcqXuP0NIoTLEb5g8vWcXXUdYjWCjQkK5x0 9/bQ==
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=DxssPzZOAKuPVZSI/ZX7zgw98pMT0Qq+YgRH1wQe3yQ=; b=MAyRCwmlib7xmef2ki/DsxKKr7Y0QTTVrJdyiMMrleEkj29EhWlr0feJXqTnljRtAQ 2jg2YQZLjC7yOZXet4cStaa8XAvtxom8QM9LP1Pe6HsMfutZQl7+AFsUxzcdebCB+1bO gitACQYQeXLByxmQXlJAIYdPpPZOvlTwryTlAbc31t2E4/2yQ2JrrwmFzGrx+xArQjF6 6wy4EK73bXJFO/oW0MyxTgCh1kcZv237CZeFnEI2xXnMuWrbq7hVkgBxJfKrtjDr6SUm Rac+Y2KPLnaWuvnbdGnoeKplQ0m60sZPpImdyhAcoLhrh8ZX6yyrSnTZPzxgsbeQP+MV tWIQ==
X-Gm-Message-State: AOUpUlFV+jMdliKWOKnsecMc8zd0PkXe5uYcW3+jtA5i6f2gbMZtZ4MB /NX6Uti/E/Xw/c6Wu9vaw2yUr09D
X-Google-Smtp-Source: AA+uWPx6YFUp3J/ZXGMSRhdBM7XIX0trEuWywIawFsAyVYgIg6AEgO7oHo1ljDQU9xjp8JKtsaO4sw==
X-Received: by 2002:a63:dd09:: with SMTP id t9-v6mr26186274pgg.370.1534359710090; Wed, 15 Aug 2018 12:01:50 -0700 (PDT)
Received: from [192.168.1.168] (76-218-8-128.lightspeed.sntcca.sbcglobal.net. [76.218.8.128]) by smtp.gmail.com with ESMTPSA id p19-v6sm36904760pgh.60.2018.08.15.12.01.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 15 Aug 2018 12:01:47 -0700 (PDT)
To: John R Levine <johnl@taugh.com>
Cc: dmarc@ietf.org
References: <20180815183022.09ED420038205D@ary.qy> <5a48a9af-1dc7-92dd-eaa8-c1df09ae26cf@gmail.com> <alpine.OSX.2.21.1808151449300.17305@ary.qy>
From: Dave Crocker <dcrocker@gmail.com>
Message-ID: <bd537a2a-5396-9d11-bef4-2363382d8954@gmail.com>
Date: Wed, 15 Aug 2018 12:01:45 -0700
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1
MIME-Version: 1.0
In-Reply-To: <alpine.OSX.2.21.1808151449300.17305@ary.qy>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/dmarc/qfM6GxhAupQAqC4Pw1SyedhokO4>
Subject: Re: [dmarc-ietf] WGLC ARC-16 concern on Section 5.1.2 - cv=fail should sign greedily
X-BeenThere: dmarc@ietf.org
X-Mailman-Version: 2.1.27
Precedence: list
List-Id: "Domain-based Message Authentication, Reporting, and Compliance \(DMARC\)" <dmarc.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dmarc>, <mailto:dmarc-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dmarc/>
List-Post: <mailto:dmarc@ietf.org>
List-Help: <mailto:dmarc-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dmarc>, <mailto:dmarc-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 15 Aug 2018 19:02:13 -0000

On 8/15/2018 11:53 AM, John R Levine wrote:
> On Wed, 15 Aug 2018, Dave Crocker wrote:
>> Modest, indeed.  Also unknown.
>>
>> This is building in a permanent behavior, for a use that is, at best, 
>> vague conjecture.
> 
> Well, sure, but we could say that about all of ARC.


No we can't.

This is a very different kind and degree of vague (and without 
precedent, I believe (unless someone can point to operational experience 
on the net that is similar?)

d/

ps. Hmmm. Unfortunately, this exchange does highlight that the 
considerable complexity of ARC is not really built upon any clear model 
of how all its provided information is expected to be used...

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net

v2.23.0 | Report a Bug | By Email