[Emailcore] [ANN] MTA Hooks list created (proposed WG; charter discussion)
Mauro De Gennaro <mauro@stalw.art> Fri, 08 May 2026 19:07 UTC
Return-Path: <mauro@stalw.art>
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 BF5B7EB672A9; Fri, 8 May 2026 12:07:09 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ietf.org; s=ietf1; t=1778267229; bh=Lp6+nAAqH3sp6BHoAW37tkgshrMk50FXU7gTx9tj7eE=; h=From:Subject:Date:To; b=eFP0OhSTAy/lZsFN/iYtasuCkAiG3maWDrZDySjHuud7gEPQkqqxkyUqzVzTRwXbl /7EQDXGouh5Gp74q7XioOOm1eztRZZdI2ZKFrbRw3Px4llvvgxVRyuaVIJjmQdYZHX FtZFRjzUG3R83+ABw5ZKWBstkd6fQmraSQQEpbTI=
X-Virus-Scanned: amavisd-new at ietf.org
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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: mail2.ietf.org (amavisd-new); dkim=neutral reason="invalid (unsupported algorithm ed25519-sha256)" header.d=stalw.art header.b="2++PqXl2"; dkim=pass (2048-bit key) header.d=stalw.art header.b="ObDssEbH"
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 UX11FmBybA2Z; Fri, 8 May 2026 12:07:05 -0700 (PDT)
Received: from mail.stalw.art (mail.stalw.art [135.181.195.209]) (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 03077EB67298; Fri, 8 May 2026 12:07:04 -0700 (PDT)
DKIM-Signature: v=1; a=ed25519-sha256; s=v1-ed25519-20260418; d=stalw.art; c=relaxed/relaxed; r=y; h=To:Date:Message-Id:Subject:From; t=1778267223; bh=Lp6+nAAqH3sp6BHoAW37tkg shrMk50FXU7gTx9tj7eE=; b=2++PqXl2oKGWOVYb4MUA2Z6OEJhNw0NT+JZt4kkyVpbwhA/ZSg D69Mcv/19/JYLJ/xH2vAFaS4jCLBHSLkgOBQ==;
DKIM-Signature: v=1; a=rsa-sha256; s=v1-rsa-20260418; d=stalw.art; c=relaxed/relaxed; r=y; h=To:Date:Message-Id:Subject:From; t=1778267223; bh=Lp6+nAAqH3sp6BHoAW37tkg shrMk50FXU7gTx9tj7eE=; b=ObDssEbHDKN6OqvY2mqODiC1aJYrGTbXuLUKSHR9/Q1auweWsU G8kwXgJ+nNTJ5LfmpPm+nzEOqVznVCJzqCWal5SyWHk0BzZ2ICYLkbgUGmchz8Au1Xg5usETOmi B+3sBB0+QA+CH617oKDRDAK46N0tKm128kVAQYa67XxB2nPXNHtOLQf3KV8HMtXiYdOcl5agFFG 9buLU9YvA8dHuPe9S2oBpRnRo+1uWVJ0phuw/WvOkAwC2EP0NOypXK3R7vk7IqKtX7ij5ip1lv8 fUFIL7cWv/czMpes+/adGjIykV1I9bo7s/EIGrJxk0xe8yLZ0R8OH9lFsex54+8+VKw==;
From: Mauro De Gennaro <mauro@stalw.art>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3864.500.181\))
Message-Id: <70681C54-BEB8-4309-8961-85E09DF74680@stalw.art>
Date: Fri, 08 May 2026 21:06:53 +0200
To: Mail Maintenance WG <mailmaint@ietf.org>, emailcore@ietf.org, dispatch@ietf.org, ietf-smtp@ietf.org, art@ietf.org
X-Mailer: Apple Mail (2.3864.500.181)
Message-ID-Hash: BPMYVX53DG55O5YYYJKGFQZH3GR5WKM2
X-Message-ID-Hash: BPMYVX53DG55O5YYYJKGFQZH3GR5WKM2
X-MailFrom: mauro@stalw.art
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] [ANN] MTA Hooks list created (proposed WG; charter discussion)
List-Id: EMAILCORE proposed working group list <emailcore.ietf.org>
Archived-At: <https://mailarchive.ietf.org/arch/msg/emailcore/43KBuf4Xn3JsQelhnZVBMUjiwV8>
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>
(Apologies for cross-posting; replies please to mtahooks@ietf.org.) Hi, A new mailing list has been created for community discussion of MTA Hooks and for the development of a charter ahead of a BOF. List address: mtahooks@ietf.org Archive: https://mailarchive.ietf.org/arch/browse/mtahooks/ To subscribe: https://mailman3.ietf.org/mailman3/lists/mtahooks.ietf.org/ For those who have not seen the work: MTA Hooks is an HTTP request/response protocol that lets an MTA delegate per-stage decisions (connect, ehlo, mail, rcpt, data; delivery, defer, dsn) to external scanners. It is intended as a modern, open alternative to Milter, which is the current de facto mechanism but has no formal specification, behaves differently across the MTAs that support it, and has no outbound-delivery hooks. MTA Hooks uses JSON or CBOR, reuses the JMAP message data model (RFC 8620 / RFC 8621), and expresses scanner modifications as JSON Pointer (RFC 6901) patches. State of play: - Draft: draft-degennaro-mta-hooks-01 at https://datatracker.ietf.org/doc/draft-degennaro-mta-hooks/ - Implemented in production in Stalwart Mail Server; planned implementation in Rspamd. - Presented at MAILMAINT (IETF 123, Madrid) and DISPATCH (IETF 125). Both sessions encouraged proceeding toward a BOF. - BOF has been requested. The AD has asked that charter discussion and community engagement happen on the new list first; the BOF may target IETF 126 or a virtual interim afterwards. If you have an interest in this work, as an MTA author, scanner author, operator, or reviewer, please subscribe. A strawman charter has been posted to the list as the starting point. Thanks, Mauro De Gennaro on behalf of the BOF proponents
- [Emailcore] [ANN] MTA Hooks list created (propose… Mauro De Gennaro