Re: What I've been wondering about the DMARC problem

Dave Crocker <dhc@dcrocker.net> Tue, 15 April 2014 15:51 UTC

Return-Path: <dhc@dcrocker.net>
X-Original-To: ietf@ietfa.amsl.com
Delivered-To: ietf@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 564ED1A049A for <ietf@ietfa.amsl.com>; Tue, 15 Apr 2014 08:51:56 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.2
X-Spam-Level:
X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3] autolearn=ham
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 mi-WbMB473lf for <ietf@ietfa.amsl.com>; Tue, 15 Apr 2014 08:51:51 -0700 (PDT)
Received: from sbh17.songbird.com (sbh17.songbird.com [72.52.113.17]) by ietfa.amsl.com (Postfix) with ESMTP id 837171A0711 for <ietf@ietf.org>; Tue, 15 Apr 2014 08:51:50 -0700 (PDT)
Received: from [192.168.1.66] (76-218-8-156.lightspeed.sntcca.sbcglobal.net [76.218.8.156]) (authenticated bits=0) by sbh17.songbird.com (8.13.8/8.13.8) with ESMTP id s3FFphmW014751 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Tue, 15 Apr 2014 08:51:46 -0700
Message-ID: <534D5516.7060902@dcrocker.net>
Date: Tue, 15 Apr 2014 08:49:42 -0700
From: Dave Crocker <dhc@dcrocker.net>
Organization: Brandenburg InternetWorking
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0
MIME-Version: 1.0
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, IETF Discussion <ietf@ietf.org>
Subject: Re: What I've been wondering about the DMARC problem
References: <53499A5E.9020805@meetinghouse.net> <5349A261.9040500@dcrocker.net> <5349AE35.2000908@meetinghouse.net> <5349BCDA.7080701@gmail.com> <01P6L9JZF5SC00004W@mauve.mrochek.com> <CAKW6Ri5f5KZyJeL7RTG2T000Qd+t61KCofNmG2JZv+nKi94Uug@mail.gmail.com> <534C0078.3070808@meetinghouse.net> <CAKW6Ri6OUmxGaBOGR2hoWpDOGWsVQ9tQ2Q9ogkT5wzFhFJLBbQ@mail.gmail.com> <534C2262.1070507@meetinghouse.net> <CAL0qLwb5p_V3i-NGhKJZBeO0qKHm1xiAq1E3nYkBzVUAXkRPpQ@mail.gmail.com> <CAKW6Ri5HWMaGMa_oLKwq5fzSUzJG=jAL1qojY1i6_tibEAxq8w@mail.gmail.com> <CAL0qLwaik1ft+AcACoc+kvKtCRt_gGvM6ov7c2yj_Uwyy3drNw@mail.gmail.com> <CAKW6Ri5_=GyOQijZMM+mqAoaEQzePGysBy9WVjN9yHO1zf3d2w@mail.gmail.com> <534C8F2B.9060903@gmail.com>
In-Reply-To: <534C8F2B.9060903@gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0 (sbh17.songbird.com [72.52.113.66]); Tue, 15 Apr 2014 08:51:46 -0700 (PDT)
Archived-At: http://mailarchive.ietf.org/arch/msg/ietf/5vbfrHUFZx65WXQ590D6DQMm9_s
X-BeenThere: ietf@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
Reply-To: dcrocker@bbiw.net
List-Id: IETF-Discussion <ietf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ietf>, <mailto:ietf-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/ietf/>
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>
X-List-Received-Date: Tue, 15 Apr 2014 15:51:56 -0000

On 4/14/2014 6:45 PM, Brian E Carpenter wrote:
> I thought that standard operating procedure in the IT industry
> was: if you roll something out and it causes serious breakage to
> some of your users, you roll it back as soon as possible.
>
> Why hasn't Yahoo rolled back its 'reject' policy by now?


As the most-recent public statement from Yahoo, this might have some 
tidbits in it that are relevant to your question:


 
http://yahoo.tumblr.com/post/82426971544/an-update-on-our-dmarc-policy-to-protect-our-users



d/
-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net