Re: [Emailcore] Ticket #50: Use of top level domains in SMTP

Dave Crocker <dhc@dcrocker.net> Fri, 23 July 2021 14:53 UTC

Return-Path: <dhc@dcrocker.net>
X-Original-To: emailcore@ietfa.amsl.com
Delivered-To: emailcore@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2B7773A0DC1 for <emailcore@ietfa.amsl.com>; Fri, 23 Jul 2021 07:53:13 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -0.754
X-Spam-Level:
X-Spam-Status: No, score=-0.754 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, NICE_REPLY_A=-0.001, RCVD_IN_BL_SPAMCOP_NET=1.347, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=no autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=dcrocker.net
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 5RV3UjLldjpi for <emailcore@ietfa.amsl.com>; Fri, 23 Jul 2021 07:53:08 -0700 (PDT)
Received: from antelope.elm.relay.mailchannels.net (antelope.elm.relay.mailchannels.net [23.83.212.4]) (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 B53F93A0DB0 for <emailcore@ietf.org>; Fri, 23 Jul 2021 07:53:07 -0700 (PDT)
X-Sender-Id: hostingeremail|x-authsender|dhc@dcrocker.net
Received: from relay.mailchannels.net (localhost [127.0.0.1]) by relay.mailchannels.net (Postfix) with ESMTP id 6B2446429F0; Fri, 23 Jul 2021 14:53:04 +0000 (UTC)
Received: from gcp-us-central1-a-smtpout2.hostinger.io (100-101-162-69.trex.outbound.svc.cluster.local [100.101.162.69]) (Authenticated sender: hostingeremail) by relay.mailchannels.net (Postfix) with ESMTPA id 4E2D4642A15; Fri, 23 Jul 2021 14:53:03 +0000 (UTC)
X-Sender-Id: hostingeremail|x-authsender|dhc@dcrocker.net
Received: from gcp-us-central1-a-smtpout2.hostinger.io (35.45.192.35.bc.googleusercontent.com [35.192.45.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256) by 100.101.162.69 (trex/6.3.3); Fri, 23 Jul 2021 14:53:04 +0000
X-MC-Relay: Neutral
X-MailChannels-SenderId: hostingeremail|x-authsender|dhc@dcrocker.net
X-MailChannels-Auth-Id: hostingeremail
X-Tart-Illustrious: 2949e9f107b0b555_1627051984171_3849315364
X-MC-Loop-Signature: 1627051984171:1928135771
X-MC-Ingress-Time: 1627051984171
Received: from [192.168.0.109] (c-24-130-62-181.hsd1.ca.comcast.net [24.130.62.181]) (Authenticated sender: dhc@dcrocker.net) by smtp.hostinger.com (smtp.hostinger.com) with ESMTPSA id 7475530B5560; Fri, 23 Jul 2021 14:53:01 +0000 (UTC)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=dcrocker.net; s=hostingermail-a; t=1627051982; bh=cjAdtRIT+yTJVfd3cV4C9uObsihLC8k/PA1wxJyGjOM=; h=Reply-To:Subject:To:References:From:Date:In-Reply-To; b=bYKiEMP1oZT79MoEPOVXa2/4ZjwEh26ZyY97UvZxI/YqLWuOjdEWdZvnWUwdMTt2U R7vK/qr57wkSmhEHcvOtuvzxzWABEpZxnn4Sm1WTVwVnun293Ft7F8rqgC5USLTGC/ moVpektJR9rq5usvqIGR9l9fGIv5SLI5BrvpUWB/f1PbZzDqjQJi2JUaJM8aPHJF2e eyBfTEmIz0MrVF2ojTNBKNWuCWJQRJ1+oow5ianbVbqx7txnfIndI+ZNmcypLRyx/r RD7h64bSq4DWDtbkUSU29md/ewyAV0kBZZC1Cq8NG3ndykmxZnoEzmUN6ETi8T69qh AO/3Xf15Nq5CQ==
Reply-To: dcrocker@bbiw.net
To: Alexey Melnikov <alexey.melnikov@isode.com>, emailcore@ietf.org
References: <33e584b5-23dd-a353-edd8-646675bcbee2@isode.com>
From: Dave Crocker <dhc@dcrocker.net>
Organization: Brandenburg InternetWorking
Message-ID: <f716d1fe-1a25-5c08-3046-95597ec1e279@dcrocker.net>
Date: Fri, 23 Jul 2021 07:52:59 -0700
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0
MIME-Version: 1.0
In-Reply-To: <33e584b5-23dd-a353-edd8-646675bcbee2@isode.com>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/emailcore/jU0QWvN4lJBg9OcUVZlR2ArBnyE>
Subject: Re: [Emailcore] Ticket #50: Use of top level domains in SMTP
X-BeenThere: emailcore@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: EMAILCORE proposed working group list <emailcore.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/emailcore>, <mailto:emailcore-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/emailcore/>
List-Post: <mailto:emailcore@ietf.org>
List-Help: <mailto:emailcore-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/emailcore>, <mailto:emailcore-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 23 Jul 2021 14:53:19 -0000

On 7/23/2021 7:38 AM, Alexey Melnikov wrote:
> I believe there was rough agreement in the past that use of top level 
> domains is going to cause interop problems, as depending on context they 
> might not be distinguishable from local hostnames. If people agree, I 
> think the Applicability Statement draft should talk briefly about this.


Yes, as long as the language makes clear that the conflict is between an 
enhanced, standardized bit of functionality, with local, 
non-standardized functionality.


d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net