Re: [Uta] Eric Rescorla's Discuss on draft-ietf-uta-smtp-require-tls-07: (with DISCUSS and COMMENT)

"Salz, Rich" <rsalz@akamai.com> Wed, 27 February 2019 19:10 UTC

Return-Path: <rsalz@akamai.com>
X-Original-To: uta@ietfa.amsl.com
Delivered-To: uta@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9550F12D4EB; Wed, 27 Feb 2019 11:10:05 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.702
X-Spam-Level:
X-Spam-Status: No, score=-2.702 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=akamai.com
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 WkWocYT_u5Je; Wed, 27 Feb 2019 11:10:04 -0800 (PST)
Received: from mx0a-00190b01.pphosted.com (mx0a-00190b01.pphosted.com [IPv6:2620:100:9001:583::1]) (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 E68CD130F17; Wed, 27 Feb 2019 11:10:03 -0800 (PST)
Received: from pps.filterd (m0122333.ppops.net [127.0.0.1]) by mx0a-00190b01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x1RIvjBp024180; Wed, 27 Feb 2019 19:09:39 GMT
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=akamai.com; h=from : to : cc : subject : date : message-id : references : in-reply-to : content-type : content-id : content-transfer-encoding : mime-version; s=jan2016.eng; bh=5ZdOg/8HO7sZrja7vf6WcNKNPWCwvndNI8QcI9okz6k=; b=MQ/+e5rw3hdqJ42nZBNkJb2/gw4WR8lA79QDD630oc3annaAtQl2bLWlWP2uHEEj8OMQ CXcd6+rgRO/Cn/pjx2IvN1Qx3bvNfO0Gi92HsUWvz+ucIpWIUIJIu6gPFohzycoTvMOO W4DTL5SyHGaIAmXLx6UW6i4wk2asunTaVFp/AzcG0hJrzaXBZ4lFOANG+paKJxrRMg8h lsMTYUgo+gKSsVm4ls/+N+x/nLAdm5uQRpkBj+PomQ3dx7caJRG4KTjT+tdroDngxM/2 7V0R9f/yxLi7i5yAxq0IsPWZfotz4OEvODzSfgzJfJQH7xta1SufjRW3EE2QzyetRQP2 QA==
Received: from prod-mail-ppoint3 (a96-6-114-86.deploy.static.akamaitechnologies.com [96.6.114.86] (may be forged)) by mx0a-00190b01.pphosted.com with ESMTP id 2qwb4xcapy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 27 Feb 2019 19:09:38 +0000
Received: from pps.filterd (prod-mail-ppoint3.akamai.com [127.0.0.1]) by prod-mail-ppoint3.akamai.com (8.16.0.27/8.16.0.27) with SMTP id x1RJ26so027674; Wed, 27 Feb 2019 14:09:36 -0500
Received: from email.msg.corp.akamai.com ([172.27.27.25]) by prod-mail-ppoint3.akamai.com with ESMTP id 2qu2d2dewe-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Wed, 27 Feb 2019 14:09:35 -0500
Received: from USTX2EX-DAG1MB1.msg.corp.akamai.com (172.27.27.101) by ustx2ex-dag1mb3.msg.corp.akamai.com (172.27.27.103) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Wed, 27 Feb 2019 13:09:34 -0600
Received: from USTX2EX-DAG1MB1.msg.corp.akamai.com ([172.27.6.131]) by ustx2ex-dag1mb1.msg.corp.akamai.com ([172.27.6.131]) with mapi id 15.00.1395.000; Wed, 27 Feb 2019 13:09:34 -0600
From: "Salz, Rich" <rsalz@akamai.com>
To: Jim Fenton <fenton@bluepopcorn.net>, Eric Rescorla <ekr@rtfm.com>, The IESG <iesg@ietf.org>
CC: "uta@ietf.org" <uta@ietf.org>, "uta-chairs@ietf.org" <uta-chairs@ietf.org>, "valery@smyslov.net" <valery@smyslov.net>, "draft-ietf-uta-smtp-require-tls@ietf.org" <draft-ietf-uta-smtp-require-tls@ietf.org>
Thread-Topic: [Uta] Eric Rescorla's Discuss on draft-ietf-uta-smtp-require-tls-07: (with DISCUSS and COMMENT)
Thread-Index: AQHUyfclHbL2QDrNfEehRkUMVk3YbaXzKP0AgADzyoA=
Date: Wed, 27 Feb 2019 19:09:33 +0000
Message-ID: <497387AA-C3D4-4B4B-81F7-90D7E1C00BD4@akamai.com>
References: <155076162945.8595.2671476533659571699.idtracker@ietfa.amsl.com> <554356ec-de3a-08ed-a920-0397813895e0@bluepopcorn.net>
In-Reply-To: <554356ec-de3a-08ed-a920-0397813895e0@bluepopcorn.net>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
user-agent: Microsoft-MacOutlook/10.16.1.190220
x-ms-exchange-messagesentrepresentingtype: 1
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [172.19.46.230]
Content-Type: text/plain; charset="utf-8"
Content-ID: <3F7F94D562018545AF2FFE2BF624CE0C@akamai.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-02-27_13:, , signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=595 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902270128
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-02-27_13:, , signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=610 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902270128
Archived-At: <https://mailarchive.ietf.org/arch/msg/uta/hfboCK8CLxAwM8e-fmceMW1_I7g>
Subject: Re: [Uta] Eric Rescorla's Discuss on draft-ietf-uta-smtp-require-tls-07: (with DISCUSS and COMMENT)
X-BeenThere: uta@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: UTA working group mailing list <uta.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/uta>, <mailto:uta-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/uta/>
List-Post: <mailto:uta@ietf.org>
List-Help: <mailto:uta-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/uta>, <mailto:uta-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 27 Feb 2019 19:10:06 -0000

I think Jim's explanation makes sense -- even if it's not required, you can still do best-effort -- and captures the desired semantics exactly right.  I hope the SecAD's will clear that discuss item.