DMARC (Domain-based Message Authentication, Reporting, and Conformance) Extension For PSDs (Public Suffix Domains)
draft-ietf-dmarc-psd-00
Network Working Group S. Kitterman
Internet-Draft fTLD Registry Services
Updates: 7489 (if approved) November 21, 2018
Intended status: Informational
Expires: May 25, 2019
DMARC (Domain-based Message Authentication, Reporting, and Conformance)
Extension For PSDs (Public Suffix Domains)
draft-ietf-dmarc-psd-00
Abstract
DMARC (Domain-based Message Authentication, Reporting, and
Conformance) is a scalable mechanism by which a mail-originating
organization can express domain-level policies and preferences for
message validation, disposition, and reporting, that a mail-receiving
organization can use to improve mail handling. DMARC policies can be
applied at the individual domain level or for a set of domains at the
organizational level. The design of DMARC precludes grouping
policies for a set of domains above the organizational level, such as
TLDs (Top Level Domains). These types of domains (which are not all
at the top level of the DNS tree) can be collectively referred to as
Public Suffix Domains (PSDs). For the subset of PSDs that require
DMARC usage, this memo describes an extension to DMARC to enable
DMARC functionality for such domains.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on May 25, 2019.
Kitterman Expires May 25, 2019 [Page 1]
Internet-Draft PSD DMARC November 2018
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology and Definitions . . . . . . . . . . . . . . . . . 4
2.1. Conventions Used in This Document . . . . . . . . . . . . 4
2.2. Public Suffix Domain (PSD) . . . . . . . . . . . . . . . 4
2.3. Longest PSD . . . . . . . . . . . . . . . . . . . . . . . 4
2.4. Public Suffix Operator (PSO) . . . . . . . . . . . . . . 4
2.5. PSO Controlled Domain Names . . . . . . . . . . . . . . . 5
2.6. Non-existent Domains . . . . . . . . . . . . . . . . . . 5
3. PSD DMARC Updates to DMARC Requirements . . . . . . . . . . . 5
3.1. General Updates . . . . . . . . . . . . . . . . . . . . . 5
3.2. Section 6.1 DMARC Policy Record . . . . . . . . . . . . . 5
3.3. Section 6.5. Domain Owner Actions . . . . . . . . . . . 5
3.4. Section 6.6.3. Policy Discovery . . . . . . . . . . . . 5
3.5. Section 7. DMARC Feedback . . . . . . . . . . . . . . . 6
4. Privacy Considerations . . . . . . . . . . . . . . . . . . . 6
4.1. Feedback leakage . . . . . . . . . . . . . . . . . . . . 6
5. Security Considerations . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
6.1. DMARC Public Suffix Domain (PSD) Registry 7
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1. Normative References . . . . . . . . . . . . . . . . . . 8
7.2. Informative References . . . . . . . . . . . . . . . . . 8
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 8
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 9
1. Introduction
DMARC [RFC7489] provides a mechanism for publishing organizational
policy information to email receivers. DMARC [RFC7489] allows policy
to be specified for both individual domains and sets of domains
within a single organization. For domains above the organizational
Kitterman Expires May 25, 2019 [Page 2]
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