Re: [art] Auto-configuring Email Clients via WebFinger

"John Levine" <johnl@taugh.com> Sat, 20 July 2019 05:04 UTC

Return-Path: <johnl@iecc.com>
X-Original-To: art@ietfa.amsl.com
Delivered-To: art@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3A39312008D for <art@ietfa.amsl.com>; Fri, 19 Jul 2019 22:04:51 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.751
X-Spam-Level:
X-Spam-Status: No, score=-1.751 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=no autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1536-bit key) header.d=iecc.com header.b=pJ5yd9qE; dkim=pass (1536-bit key) header.d=taugh.com header.b=b1f5KFSI
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 VuiIDyca0JlQ for <art@ietfa.amsl.com>; Fri, 19 Jul 2019 22:04:50 -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 BA1E3120044 for <art@ietf.org>; Fri, 19 Jul 2019 22:04:49 -0700 (PDT)
Received: (qmail 20087 invoked from network); 20 Jul 2019 05:04:46 -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; s=4e73.5d32a0ee.k1907; i=johnl-iecc.com@submit.iecc.com; bh=p2hGMN+rXiu2M/C0ZPW4Z954bxWceJo0L/+W8TbAOMY=; b=pJ5yd9qEKNARsa98XUMiOlVit3NSi3hk87wRMyD3e6OnYM1bQrmbj1UDyh1baC+UKR7PbDCzaTyMt03zyKz/aR0+nXd4nnJnFt7ec/+a9KjQbB3fEVx0jm7KTrx9kscOhND9vP9As77Pj2KiYNCN/72U+9xZejKyAwFcw2iako/1r1ibpOtd6zAwn9N0rYOxpSWlIn++LYBLZHfhS2RW612VcqPn2S9FonVYF0eQQYo8v/InShwooqO6iy5smORs
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; s=4e73.5d32a0ee.k1907; olt=johnl-iecc.com@submit.iecc.com; bh=p2hGMN+rXiu2M/C0ZPW4Z954bxWceJo0L/+W8TbAOMY=; b=b1f5KFSInOYSyeDKZB/ByTpiBg9oWVkP03l62s+lfXhlqXCKZ4CE1j/x6i7wi+8RMtWKGfVRa5/n4BY+m9zfkgESF4y/Sv0RTzN0DCI/mf92xZROjjJkihwdr5AkxMbvRtRWmOF18n5NBxlmr4B+HeECNsoT4HH8jLYaT0uBeq5/aUa44OiDAq39R0mQe1MjzwS3W8oyq46KxJH1uYTiy9Qp2j/MNoTwOyAmvPRb4xFdOjmEeMsoML48gjhhyqye
Received: from ary.qy ([64.246.232.221]) by imap.iecc.com ([64.57.183.75]) with ESMTPSA (TLS1.2 ECDHE-RSA AES-256-GCM AEAD, johnl@iecc.com) via TCP; 20 Jul 2019 05:04:45 -0000
Received: by ary.qy (Postfix, from userid 501) id 925A852550A; Sat, 20 Jul 2019 01:04:44 -0400 (EDT)
Date: Sat, 20 Jul 2019 01:04:44 -0400
Message-Id: <20190720050445.925A852550A@ary.qy>
From: John Levine <johnl@taugh.com>
To: art@ietf.org
Cc: dave@cridland.net
In-Reply-To: <CAKHUCzzS+k_DUwaBcvTH_68G4JS_6UHA=b6Ak49HuPVgta6zwg@mail.gmail.com>
Organization: Taughannock Networks
X-Headerized: yes
Mime-Version: 1.0
Content-type: text/plain; charset="utf-8"
Content-transfer-encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/art/UXiJ47Ht8K4i--Oal4WOXTcUN8c>
Subject: Re: [art] Auto-configuring Email Clients via WebFinger
X-BeenThere: art@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Applications and Real-Time Area Discussion <art.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/art>, <mailto:art-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/art/>
List-Post: <mailto:art@ietf.org>
List-Help: <mailto:art-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/art>, <mailto:art-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sat, 20 Jul 2019 05:04:51 -0000

In article <CAKHUCzzS+k_DUwaBcvTH_68G4JS_6UHA=b6Ak49HuPVgta6zwg@mail.gmail.com> you write:
>I'm not saying that additional information isn't needed, but it'd be nice
>to be able to use SRV alongside.

There are places where, say, mailboxes with local parts starting with
A-M are on one IMAP server and those starting with N-Z are on another.
It's hard to see how you could do that with SRV records tied to the
domain.

>The Thunderbird config would need to be adapted anyway; it's not easily
>extensible, due to not using XML namespaces, for one thing.

It definitely needs extensions.

R's,
John

PS: for anyone who was going to suggest encoding the local part in the DNS for
SRV lookups, you really don't want to go there.