Re: [dmarc-ietf] Response to a claim in draft-crocker-dmarc-author-00 security considerations

Dave Crocker <dcrocker@gmail.com> Sun, 19 July 2020 12:40 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 79BDB3A043E for <dmarc@ietfa.amsl.com>; Sun, 19 Jul 2020 05:40:24 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.099
X-Spam-Level:
X-Spam-Status: No, score=-2.099 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.001, SPF_HELO_NONE=0.001, 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 EKbFRmhrSRoL for <dmarc@ietfa.amsl.com>; Sun, 19 Jul 2020 05:40:23 -0700 (PDT)
Received: from mail-oi1-x22f.google.com (mail-oi1-x22f.google.com [IPv6:2607:f8b0:4864:20::22f]) (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 513973A043A for <dmarc@ietf.org>; Sun, 19 Jul 2020 05:40:23 -0700 (PDT)
Received: by mail-oi1-x22f.google.com with SMTP id k22so12195462oib.0 for <dmarc@ietf.org>; Sun, 19 Jul 2020 05:40:23 -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-transfer-encoding:content-language; bh=+IMdLFT2B9yr7lbHNlVkAFFUj7uEffv5pgDQeMxunMo=; b=jaN0ZkrxqPx0BlmfL44zs0760A0ZwEUc83avWa0jOZQjKUwr2ud71bb0TCf2Db7SqC zt6Tkhg+hQh9TqGR9/+X2k5Rp7H59+WRIP1VPa156Z6ODvK2ahGfJcmHAPaZFIpfWTJr wC8KCKsi3FE5rRyA+UJOjuj0ug/IopndNWmZorCT9rkh2U2f5LG6uxeX4N3WPMC57sVe bHrT3l/pG/aiLTEv7YhvK1P72FjWBiZXbqlSrcZuOL75SK7rw5juKeLi/XxXDiJGqBMw Ei2UF9kgnBi0lh24WcCrJbaqj2xyRRkFanuwYO1QRj1OIzilurYjd5SMME8lOtFXzSVn aZhQ==
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-transfer-encoding :content-language; bh=+IMdLFT2B9yr7lbHNlVkAFFUj7uEffv5pgDQeMxunMo=; b=KwIGAOQ7GEZfnpKQmD6cxBdK7zBLbGvUXMfQ8jVu8MFp43au1dnYXz1KxOvNfZxrWX 9cGdsEbm1WLUj0YcOkHqQyOB06OIk+Xb4RCONFAxoOYBowzRmTBc7rcx+Ky04HbOtSnj Y9kx11aQFcMRoxXdN7RDLOg5VxRvgJwxO0b+rwuUkVDREq8ggBEmIbX2efswg5AlCMwz zZn5pleGUJP9bjvpaLXp9HJuqpL+RgNJ9okcgyTv+mePp22XxpVh62rsIEkdi6tmJcWt hcot4600qDY3AddbK56i3xVqjLb3UVzrsBz7djzLJd2N+RtdP1OwpVj3oXGu2bbjejzW VriA==
X-Gm-Message-State: AOAM533ermuu2FVyiOulwm2SGn1orP2idRIw8aQu8QzXChEfBL2a7bxL XYIx+r7xcFwQRt7TDmPcQR9zmQpaZ84=
X-Google-Smtp-Source: ABdhPJxQPLpQBbUlzaAdemYMvzMHngez4iMIW9jQLPVgZkOX5hmABTxcEE36UF3QFKi33j4gyupxNQ==
X-Received: by 2002:aca:5a41:: with SMTP id o62mr14843107oib.87.1595162422358; Sun, 19 Jul 2020 05:40:22 -0700 (PDT)
Received: from ?IPv6:2600:1700:a3a0:4c80:fc69:4fcf:5c0d:166? ([2600:1700:a3a0:4c80:fc69:4fcf:5c0d:166]) by smtp.gmail.com with ESMTPSA id s4sm3531885ood.45.2020.07.19.05.40.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 19 Jul 2020 05:40:21 -0700 (PDT)
To: "Murray S. Kucherawy" <superuser@gmail.com>
Cc: IETF DMARC WG <dmarc@ietf.org>
References: <cd9258e6-3917-2380-dd9b-66d74f3a64d3@gmail.com> <20200717210053.674D61D2C431@ary.qy> <CAL0qLwbkhG-qUyGqxaEjcFn2Lb7wPMhcPFEMA8eqptBJpePPxA@mail.gmail.com>
From: Dave Crocker <dcrocker@gmail.com>
Message-ID: <0bbf7999-0b40-401f-24d0-09eb1c8ec2d4@gmail.com>
Date: Sun, 19 Jul 2020 05:40:19 -0700
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0
MIME-Version: 1.0
In-Reply-To: <CAL0qLwbkhG-qUyGqxaEjcFn2Lb7wPMhcPFEMA8eqptBJpePPxA@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Transfer-Encoding: 8bit
Content-Language: en-US
Archived-At: <https://mailarchive.ietf.org/arch/msg/dmarc/U-flBFKptSzdl8ZqlRACLPTtplI>
Subject: Re: [dmarc-ietf] Response to a claim in draft-crocker-dmarc-author-00 security considerations
X-BeenThere: dmarc@ietf.org
X-Mailman-Version: 2.1.29
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: Sun, 19 Jul 2020 12:40:24 -0000

On 7/18/2020 5:16 PM, Murray S. Kucherawy wrote:
> At some point in the past, Gmail decided to show the email address 
> only unless that address was in the recipient's contact list, 


btw, I just logged in to gmail's web interface -- I normally access via 
imap -- and it is only showing display-name text.  No email address for 
any of the messages.  As far as I can tell, I have no address book at gmail.


d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net