IETF Logo Mail Archive

Re: [dmarc-ietf] Sender-supplied decision matrix for passing DMARC

John Levine <johnl@taugh.com> Mon, 14 June 2021 19:53 UTC

Return-Path: <johnl@iecc.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 D9FAE3A083B for <dmarc@ietfa.amsl.com>; Mon, 14 Jun 2021 12:53:39 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.851
X-Spam-Level:
X-Spam-Status: No, score=-1.851 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, HEADER_FROM_DIFFERENT_DOMAINS=0.249, 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=iecc.com header.b=TB66yqHt; dkim=pass (2048-bit key) header.d=taugh.com header.b=hyzcCUTn
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 3LZYFZ7IODYZ for <dmarc@ietfa.amsl.com>; Mon, 14 Jun 2021 12:53:35 -0700 (PDT)
Received: from gal.iecc.com (gal.iecc.com [IPv6:2001:470:1f07:1126:0:43:6f73:7461]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 458D73A082C for <dmarc@ietf.org>; Mon, 14 Jun 2021 12:53:35 -0700 (PDT)
Received: (qmail 59276 invoked from network); 14 Jun 2021 19:53:33 -0000
DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=iecc.com; h=date:message-id:from:to:cc:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:cleverness; s=e78a.60c7b3bd.k2106; bh=DHRX9xoTbhAo6LQuQbf0dB71MiY1VNaloP7LnczvDaQ=; b=TB66yqHtDjYnCU+/eiy6HFk0dzyZc1o2BFiYOvQSjc4xJZNLigaW8/6yYSK7R9+hKCo+c55fily2XcWv/pP/GUXJd5N0GK02AocsonrXCxV3jF16BXxNGQCcjyPp0mVGDPyAbRx1VKoSAShzAIu+Rj4OsLUE2XeYroKyGDQX/bE77/+XmOfxHPqzbtn4wY700rRxIDgJC5O/iQq7z2614FIFjkGlyJdv4nT4xbb+YQP1y6KHig4BRRlv2g7/SrZ5GFayP6RrEyLNCismCLtCeNXZUATr9spngV1LRMLuIXsFDQzT3gaKAWI+NhUeqFTE3XqmLiQumNJG+AU21RALAQ==
DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=taugh.com; h=date:message-id:from:to:cc:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:cleverness; s=e78a.60c7b3bd.k2106; bh=DHRX9xoTbhAo6LQuQbf0dB71MiY1VNaloP7LnczvDaQ=; b=hyzcCUTnuBrS8GPZzE76VEb0UiUrKAH5WgPBnLbb+Feh4lAjl0CvMwqmeFLTODImwJpmBvuCDNFTiSxn9jELwPh7Qs9we5p5s99+pMG+/yf05up0rfpgL7iJX6zAXjzab3idNMQ1pMLSSMkx6oBEPQViU6aSL5MtfkFrPQFFxP+sIheIURJYV/hVb++qFJu3+AbpXEACZ/bVWGpJTxCH8cS97nHXCaLZojmo096S0Q7oSdlG+Px6GvPpPuhGtuLqec1oxurdZqY6jivUNU8dkGiWDaQD/VL7yc9LaO6t+W5Rc2h41KVmxzOap7+ww8Jqt30KpamCFmqydvvowIEb8g==
Received: from ary.qy ([IPv6:2001:470:1f07:1126::78:696d:6170]) by imap.iecc.com ([IPv6:2001:470:1f07:1126::78:696d:6170]) with ESMTPS (TLS1.2 ECDHE-RSA AES-256-GCM AEAD) via TCP6; 14 Jun 2021 19:53:33 -0000
Received: by ary.qy (Postfix, from userid 501) id 235D510D0492; Mon, 14 Jun 2021 15:53:30 -0400 (EDT)
Date: Mon, 14 Jun 2021 15:53:30 -0400
Message-Id: <20210614195331.235D510D0492@ary.qy>
From: John Levine <johnl@taugh.com>
To: dmarc@ietf.org
Cc: Alex_Brotman@comcast.com
In-Reply-To: <MN2PR11MB4351C05DCCFD04F0C7B3F766F7319@MN2PR11MB4351.namprd11.prod.outlook.com>
Organization: Taughannock Networks
X-Headerized: yes
Cleverness: minimal
Mime-Version: 1.0
Content-type: text/plain; charset="utf-8"
Content-transfer-encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/dmarc/N9U-PmzuAbdstTFLm0sO2TfgjZM>
Subject: Re: [dmarc-ietf] Sender-supplied decision matrix for passing DMARC
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: Mon, 14 Jun 2021 19:53:40 -0000

It appears that Brotman, Alex <Alex_Brotman@comcast.com> said:
>Does this make everyone cringe, or perhaps worth a larger discussion?

Cringe.  If others have said, if you want DKIM to pass, sign everything with DKIM.  I can promise you
that anyone who says "all of our mail will always pass SPF" doesn't know where his mail is going.

For other reasons it would be a good idea to publish SPF records and have them usually pass, but they don't
have to be the same domain as the DKIM or DMARC.

v2.23.0 | Report a Bug | By Email