IETF Logo Mail Archive

[Emailcore] Re: draft-ietf-emailcore-as-26 ietf last call Secdir review

Alexey Melnikov <aamelnikov@fastmail.fm> Tue, 27 January 2026 10:17 UTC

Return-Path: <aamelnikov@fastmail.fm>
X-Original-To: emailcore@mail2.ietf.org
Delivered-To: emailcore@mail2.ietf.org
Received: from localhost (localhost [127.0.0.1]) by mail2.ietf.org (Postfix) with ESMTP id B42FFADA5E18 for <emailcore@mail2.ietf.org>; Tue, 27 Jan 2026 02:17:06 -0800 (PST)
X-Virus-Scanned: amavisd-new at ietf.org
X-Spam-Flag: NO
X-Spam-Score: -2.798
X-Spam-Level:
X-Spam-Status: No, score=-2.798 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, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: mail2.ietf.org (amavisd-new); dkim=pass (2048-bit key) header.d=fastmail.fm header.b="HmkTqOAJ"; dkim=pass (2048-bit key) header.d=messagingengine.com header.b="egyBQ6kr"
Received: from mail2.ietf.org ([166.84.6.31]) by localhost (mail2.ietf.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GPG7dOGm3NMY for <emailcore@mail2.ietf.org>; Tue, 27 Jan 2026 02:17:06 -0800 (PST)
Received: from fout-a8-smtp.messagingengine.com (fout-a8-smtp.messagingengine.com [103.168.172.151]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256) server-digest SHA256) (No client certificate requested) by mail2.ietf.org (Postfix) with ESMTPS id 53C59ADA5E11 for <emailcore@ietf.org>; Tue, 27 Jan 2026 02:17:06 -0800 (PST)
Received: from phl-compute-03.internal (phl-compute-03.internal [10.202.2.43]) by mailfout.phl.internal (Postfix) with ESMTP id 15B32EC0261; Tue, 27 Jan 2026 05:17:00 -0500 (EST)
Received: from phl-imap-01 ([10.202.2.91]) by phl-compute-03.internal (MEProxy); Tue, 27 Jan 2026 05:17:00 -0500
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fastmail.fm; h= cc:content-transfer-encoding:content-type:content-type:date:date :from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:subject:subject:to:to; s=fm3; t=1769509020; x=1769595420; bh=cRcJ93JvQTJMLr3izUX1UViHuAJIvNV7o7Rizj3uRhY=; b= HmkTqOAJi8vhTGaZYFyUpOOf37+6MB3fCO5GyntN0MGZI17nxHh7W76axTSWMOGa rZGLwOcPXIHVLe2r/+78uSAMd7BVwCppNwjVgTUNclJFe3uf2sbZOkTXmyxtlhsI 5Ahp/RCDQG7Oyi1Fg8V+cF0bSid8xkzVjaektR+2Vm7459KSZorerQ1DuonBC3Yf H6GxTrfqOLeQ7f+rws02wlHQTSyDbI5Y6ITbDi2HH92vjCtxqcXvL1tisqqLKv+d xGeEmxFeXarfX5VPfpjU1o51ygD7BcB2DjKbTMdvPvGMy1B195Ba/U/gKAzC2Gql Fle2gkK/WNQuKN38tjcLQA==
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :content-type:date:date:feedback-id:feedback-id:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to:x-me-proxy:x-me-sender :x-me-sender:x-sasl-enc; s=fm2; t=1769509020; x=1769595420; bh=c RcJ93JvQTJMLr3izUX1UViHuAJIvNV7o7Rizj3uRhY=; b=egyBQ6krK2RW0Onlj Fg7F/OZf5+uT6HOqx3xrzW4sx0NaK8bWWNL3gBPfcSLpCgRZnRPMrY0rp63RM/RJ fWzK2CIC3X/Cpfk2vTyZjzXpbpOy68DYkJY26ZIfGKRDNvb0oZU4+hjL2JBQ59dO +1MZC54uRgSx/KgT/5rFswoGO0XNXzKUTwxtXHWzd0UoJHjIMPgLxFLhs5CLVO4j nux/OYWg7D3z0kCtBdcCb0xtiV9Q3J6KjBNPh4Ue3t0o8+PF/dci21T7I1Non+yO nYYDmaBWRlsdbMTJpDKoR3O16wN5D9XuSPdaBYqMIhXwW95cdmfPB6nCcxNu5Wy4 QwRZw==
X-ME-Sender: <xms:m5B4aRXrbY2Xspl5YzE06hfPc1qt9RT2DEZChe6dO5Ie3W3Cdh9b9w> <xme:m5B4acbJ7MHfoXyeqa3ZQT7Buu5X9AAAMlqgzQkNG30beMDy9RjE_3XkScaX05rsM R15YwGgqcq5h3v561Z-uD559un1ILOsS0wLLsrvEDr5vIpGH9Omhpk>
X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefgedrtddtgdduiedtvdeiucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfurfetoffkrfgpnffqhgenuceu rghilhhouhhtmecufedttdenucenucfjughrpefoggffhffvkfgjfhfutgfgsehtqhertd ertdejnecuhfhrohhmpedftehlvgigvgihucfovghlnhhikhhovhdfuceorggrmhgvlhhn ihhkohhvsehfrghsthhmrghilhdrfhhmqeenucggtffrrghtthgvrhhnpeeigeeljeevhf dugfejgfegteeuvddttddtjeetgeekheeludevueehfeehveevteenucevlhhushhtvghr ufhiiigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpegrrghmvghlnhhikhhovhesfh grshhtmhgrihhlrdhfmhdpnhgspghrtghpthhtohepvddpmhhouggvpehsmhhtphhouhht pdhrtghpthhtohepvghmrghilhgtohhrvgesihgvthhfrdhorhhgpdhrtghpthhtohepjh hghhesfihiiihmrghilhdrohhrgh
X-ME-Proxy: <xmx:m5B4aWUb-B9EloX7US0B_jfFtfGfDW4tMwt2xP0S2r_V7IJWyAYKRg> <xmx:m5B4aYkH8DSDzd_7huKl3jZP_7WNx4zIOMYwf-Nhhe7zvDtXVTtO4A> <xmx:m5B4aYBBjSVW-jQrKpvjL_7hI3-Wj1Y3iMkMPyECOXM1ZeBsZQjrJQ> <xmx:m5B4aYcs2G97LlK2D_5IDXaqXsiTlf5V9YUNTbH1vNqWTL12JvW0Jw> <xmx:nJB4aUpwqMibhAXDqGmb31seKddRsQWlsxZuFEe4sf2gOr1VjBmZxFjj>
Feedback-ID: if62040e7:Fastmail
Received: by mailuser.phl.internal (Postfix, from userid 501) id CC1C718C0068; Tue, 27 Jan 2026 05:16:59 -0500 (EST)
X-Mailer: MessagingEngine.com Webmail Interface
MIME-Version: 1.0
X-ThreadId: AE1rOhbl4joo
Date: Tue, 27 Jan 2026 10:16:39 +0000
From: Alexey Melnikov <aamelnikov@fastmail.fm>
To: Jeremy Harris <jgh@wizmail.org>, emailcore@ietf.org
Message-Id: <cb691bfa-5e60-4492-b07c-d80d31616373@app.fastmail.com>
In-Reply-To: <4e749bfc-de7a-45fa-a1a7-eeaf511391d5@wizmail.org>
References: <176768306377.3505627.2383646331815548475@dt-datatracker-5656579b89-p6k4r> <a1bd8efc-0b5c-4dc6-a4f5-a944713b46ab@fastmail.com> <4e749bfc-de7a-45fa-a1a7-eeaf511391d5@wizmail.org>
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
Message-ID-Hash: MS7JOOUEK5TMBJ3UQOWW5YM25RP47G6A
X-Message-ID-Hash: MS7JOOUEK5TMBJ3UQOWW5YM25RP47G6A
X-MailFrom: aamelnikov@fastmail.fm
X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header
X-Mailman-Version: 3.3.9rc6
Precedence: list
Subject: [Emailcore] Re: draft-ietf-emailcore-as-26 ietf last call Secdir review
List-Id: EMAILCORE proposed working group list <emailcore.ietf.org>
Archived-At: <https://mailarchive.ietf.org/arch/msg/emailcore/myXY17i60Zch3BNcYMzDJA6_mM4>
List-Archive: <https://mailarchive.ietf.org/arch/browse/emailcore>
List-Help: <mailto:emailcore-request@ietf.org?subject=help>
List-Owner: <mailto:emailcore-owner@ietf.org>
List-Post: <mailto:emailcore@ietf.org>
List-Subscribe: <mailto:emailcore-join@ietf.org>
List-Unsubscribe: <mailto:emailcore-leave@ietf.org>

Hi Jeremy,

On Mon, Jan 26, 2026, at 11:21 PM, Jeremy Harris wrote:
> On 2026/01/26 6:36 PM, Ken Murchison wrote:
>>>
>>> Section 6.3 describes SMTP AUTH and notes the common username/password
>>> configuration for submission. It would be worth adding a sentence making the
>>> security property explicit (e.g., credentials MUST NOT be sent without TLS, and
>>> deployments should require TLS for AUTH).
>> 
>> Done.
>
> There exist non- username/password SMTP AUTH methods, which do their 
> own protection
> of secrets.  For example, the SCRAM family.  Requiring TLS for all AUTH 
> methods is
> overkill.

That is why the document is saying "cleartext credentials" instead of just "credentials" when mentioning use of TLS.

Best Regards,
Alexey

v2.40.4 | Report a Bug | By Email | System Status