Return-Path: X-Original-To: sml@mail2.ietf.org Delivered-To: sml@mail2.ietf.org Received: from localhost (localhost [127.0.0.1]) by mail2.ietf.org (Postfix) with ESMTP id A606B5A46224 for ; Thu, 28 Aug 2025 14:11:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at ietf.org X-Spam-Flag: NO X-Spam-Score: -4.4 X-Spam-Level: X-Spam-Status: No, score=-4.4 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, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=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=sandelman.ca 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 Zupb-HQvMv4b for ; Thu, 28 Aug 2025 14:11:57 -0700 (PDT) Received: from tuna.sandelman.ca (tuna.sandelman.ca [IPv6:2607:f0b0:f:3:216:3eff:fe7c:d1f3]) (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 209525A4621C for ; Thu, 28 Aug 2025 14:11:57 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by tuna.sandelman.ca (Postfix) with ESMTP id AC1ED1800F for ; Thu, 28 Aug 2025 17:11:56 -0400 (EDT) Received: from tuna.sandelman.ca ([127.0.0.1]) by localhost (localhost [127.0.0.1]) (amavis, port 10024) with LMTP id zrgr80WqV6mg for ; Thu, 28 Aug 2025 17:11:55 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sandelman.ca; s=mail; t=1756415515; bh=uKJX2y65M7XSk6Fve1GLZWWcmpPtrIDfEgt007H89/8=; h=From:To:Subject:In-Reply-To:References:Date:From; b=RB1MQ5Wm1QLtKo8gUgaSkMB8jLFeniN1cjKAx7KnW2KfYXwxEY/nju8JWW+2BBS2j SMF72aR1HK8nQKhe9Z4e6e+JaVlwHlEMEk2Jj7Inps5PnLWeDkfuHN66NDHj273tnQ ROMuYzlJiN0RAL3RrF1FfOU/Z0hwScHSaMOVaYxImfkiRlzY0AfIJ2CrUu8xt8OHB8 LCUeNQp40gkDKD+giUQkRerrKBDHq38a1iSpvmGoG/5TJC9xBrCwMzVh8mhnglQBaZ GiDhIujWPgnHyWP5HwvHiea0T/X+cgRWa3XUdAWPuq2j6coXLkmCkZlbuR2H5Yd7Io dEgfKhAqTaLmA== Received: from sandelman.ca (unknown [IPv6:2607:f0b0:f:2:7cd8:6ff:fe54:5c1a]) by tuna.sandelman.ca (Postfix) with ESMTP id 0A1741800C for ; Thu, 28 Aug 2025 17:11:55 -0400 (EDT) Received: from obiwan.sandelman.ca (obiwan.sandelman.ca [127.0.0.1]) by sandelman.ca (Postfix) with ESMTP id 04794220 for ; Thu, 28 Aug 2025 17:11:55 -0400 (EDT) From: Michael Richardson To: sml@ietf.org In-Reply-To: <20250827222825.430BCD9FDF65@ary.qy> References: <20250825192803.1CE42D96C6E8@ary.qy> <6ea763c2-925a-3f3f-9d52-a357256e55b7@taugh.com> <7158.1756238376@obiwan.sandelman.ca> <27676.1756316868@obiwan.sandelman.ca> <20250827222825.430BCD9FDF65@ary.qy> X-Mailer: MH-E 8.6+git; nmh 1.8+dev; GNU Emacs 28.2 X-Face: $\n1pF)h^`}$H>Hk{L"x@)JS7<%Az}5RyS@k9X%29-lHB$Ti.V>2bi.~ehC0;<'$9xN5Ub# z!G,p`nR&p7Fz@^UXIn156S8.~^@MJ*mMsD7=QFeq%AL4m Message-ID-Hash: MOHT74ME2ZNZWRJBGE666TS3O7PZM7DD X-Message-ID-Hash: MOHT74ME2ZNZWRJBGE666TS3O7PZM7DD X-MailFrom: mcr+ietf@sandelman.ca 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: =?utf-8?q?=5BSml=5D_Re=3A_Structured_Email_and_AI_Agents?= List-Id: Structured Email Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Yes we can use Sender: It contains an email address. Does it need to be valid? I think so. I'm concerned that it might then be used for other kinds of validation, and we can't just put what we need there. So, yes, we could use it. I don't agree that the *target* can be indicated with Content-Type. I don't think this example is at all correct: From: Boss Bob Sender: Bob's assistant Subject: whatever I think it would be: From: Boss Bob Sender: Company Travel Assistant Subject: whatever Having the same email in Sender: would mean sorting (sieving) on what? The word "assistant" in the other part? =2D- Michael Richardson . o O ( IPv6 I=C3=B8T consulti= ng ) Sandelman Software Works Inc, Ottawa and Worldwide --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQFKBAEBCgA0FiEEbsyLEzg/qUTA43uogItw+93Q3WUFAmiwxhoWHG1jcitpZXRm QHNhbmRlbG1hbi5jYQAKCRCAi3D73dDdZXGRB/4jmmwB7IT6xY1NonIsdCrBDtJ+ Tii1d1sJbWK98VFxhhKSWXa9Tw5DiSqmdlTswYjdiH3eT7JCVcLkppJqyAygar26 PMA96bJ5hNLihSbuTVmGCLmOPqKGFKU4QIzllVlwZxAzxWG/v1k6CMQv8STFlB9f t6jy9GZkotX8tNMRJu5N4dCBByd6pw/vhiHOnh459pP94/H2U3l3Q6ZSXC5Rd3dV s0tgPz2x8mW3fClQ4K440BkqDpG/pDRsElnPVMhbOWd7h5SMoIAJ/6zgJkzcle1h lwljWaV5epjvGTPWKq6c/v+8hlIRFKnXxJwB1qebTOhW/5YimsCeGLO9O3ph =MtyD -----END PGP SIGNATURE----- --=-=-=--