Re: [dmarc-ietf] DMARC2 & SPF Dependency Removal

John Levine <johnl@taugh.com> Sun, 18 June 2023 01:50 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 94F52C14CEFF for <dmarc@ietfa.amsl.com>; Sat, 17 Jun 2023 18:50:21 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.147
X-Spam-Level:
X-Spam-Status: No, score=-4.147 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=0.25, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, URIBL_DBL_BLOCKED_OPENDNS=0.001, URIBL_ZEN_BLOCKED_OPENDNS=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="BYDPyM1A"; dkim=pass (2048-bit key) header.d=taugh.com header.b="Bals6X+z"
Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eKZRLLOE8aSO for <dmarc@ietfa.amsl.com>; Sat, 17 Jun 2023 18:50:16 -0700 (PDT)
Received: from gal.iecc.com (gal.iecc.com [IPv6:2001:470:1f07:1126:0:43:6f73:7461]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9F6F1C151981 for <dmarc@ietf.org>; Sat, 17 Jun 2023 18:50:15 -0700 (PDT)
Received: (qmail 88147 invoked from network); 18 Jun 2023 01:50:13 -0000
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed; d=iecc.com; h=date:message-id:from:to:cc:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:cleverness; s=15851.648e62d5.k2306; bh=Kcu1OhkvsfaUOFULsKTmf5wtcLPidY2wYk56XKP1zlQ=; b=BYDPyM1Aw+tQ2olap6LpJ+lGvjz85fHgQqjExBW0+jBIWPnvP2aAzcXK2JZhnW98ByUwqmcb/BZf6W8hmKAd+2u9KdFV5odYhR++ABdTe3D8csm9++kJzhlYs+9qYcjzwbLWCd4liffUIKxTW5oB9YsZK5eeR9CL6R9T33/AASDAGhHOQ5/fReGbXu/UdAKOmizJK3WCW9fb8wuoXQ9XBZs/mFRD125B51WoMJjCyVcDYLeVMhgDG3ZspGpv0L8q//HJkPhCAmyP317STWIMhyGn83RNB2Tn+Qa38JhqA6rragMxWu37uSFyf9Sz9+OQ5xZww85cFhLR6Boucafn2w==
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed; d=taugh.com; h=date:message-id:from:to:cc:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:cleverness; s=15851.648e62d5.k2306; bh=Kcu1OhkvsfaUOFULsKTmf5wtcLPidY2wYk56XKP1zlQ=; b=Bals6X+z6fORjOoSVGxnvdRSZ0BzOQIGNX9oNcRD7JBFUAP0/cwgChjwbMRWyerHFzTGkZj8lwNHf3YKpwISBXeEa3icHhYYyI68NfduEnZE+ewZISm2cWlL3LO5F+4voMUIGsUFHpUUbof8J9Mw3MNb/dhPRYrXJivcOsLkmIkwh3Xvz+B0kM8Jhkh0wn563xQWJuz6uo7o9uxUhZaszQ/pmzFeCs1bGdC3B6GqMH1QzBZtG/pb8uQ142yTaW8HsBYxSB/dNFlvhPvCiIjCyJnkM7rXrj5RlCKDnf9/hFvTFuKuU6W/iu5ME9e3UigAkve7FtGPx8N37DKqB05+0A==
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 (TLS1.3 ECDHE-RSA AES-256-GCM AEAD) via TCP6; 18 Jun 2023 01:50:13 -0000
Received: by ary.qy (Postfix, from userid 501) id DAB83F2E1699; Sat, 17 Jun 2023 21:50:12 -0400 (EDT)
Date: Sat, 17 Jun 2023 21:50:12 -0400
Message-Id: <20230618015012.DAB83F2E1699@ary.qy>
From: John Levine <johnl@taugh.com>
To: dmarc@ietf.org
Cc: hsantos@isdg.net
In-Reply-To: <CD569B49-A351-4234-A088-14BBAD469202@isdg.net>
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/ohILhG86q0SiiQM5p4rzAptFBJk>
Subject: Re: [dmarc-ietf] DMARC2 & SPF Dependency Removal
X-BeenThere: dmarc@ietf.org
X-Mailman-Version: 2.1.39
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, 18 Jun 2023 01:50:21 -0000

It appears that Hector Santos  <hsantos@isdg.net> said:
>> Can these senders not accomplish the same thing by removing the SPF record altogether?
>> 
>> -MSK, participating
>
>
>Isn’t SPF, DKIM and alignment are all required for DMARC1 passage? Failure if any are missing?

No, that has never been the case.  Please reread RFC 7489.

R's,
John