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<title>Diff: draft-ietf-dmarc-psd-04.txt - draft-ietf-dmarc-psd-05.txt</title>
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<tr bgcolor="orange"><th></th><th> draft-ietf-dmarc-psd-04.txt </th><th> </th><th> draft-ietf-dmarc-psd-05.txt </th><th></th></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">Network Working Group S. Kitterman</td><td> </td><td class="right">Network Working Group S. Kitterman</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">Internet-Draft fTLD Registry Services</td><td> </td><td class="right">Internet-Draft fTLD Registry Services</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0001" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock">Intended status: Experimental <span class="delete">May</span> 27, 2019</td><td> </td><td class="rblock">Intended status: Experimental <span class="insert">July</span> 27, 2019</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock">Expires: <span class="delete">November</span> 28, <span class="delete">2019</span></td><td> </td><td class="rblock">Expires: <span class="insert">January</span> 28, <span class="insert">2020</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">DMARC (Domain-based Message Authentication, Reporting, and Conformance)</td><td> </td><td class="right">DMARC (Domain-based Message Authentication, Reporting, and Conformance)</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Extension For PSDs (Public Suffix Domains)</td><td> </td><td class="right"> Extension For PSDs (Public Suffix Domains)</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0002" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> draft-ietf-dmarc-psd-0<span class="delete">4</span></td><td> </td><td class="rblock"> draft-ietf-dmarc-psd-0<span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">Abstract</td><td> </td><td class="right">Abstract</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> DMARC (Domain-based Message Authentication, Reporting, and</td><td> </td><td class="right"> DMARC (Domain-based Message Authentication, Reporting, and</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Conformance) is a scalable mechanism by which a mail-originating</td><td> </td><td class="right"> Conformance) is a scalable mechanism by which a mail-originating</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> organization can express domain-level policies and preferences for</td><td> </td><td class="right"> organization can express domain-level policies and preferences for</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> message validation, disposition, and reporting, that a mail-receiving</td><td> </td><td class="right"> message validation, disposition, and reporting, that a mail-receiving</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> organization can use to improve mail handling. DMARC policies can be</td><td> </td><td class="right"> organization can use to improve mail handling. DMARC policies can be</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0003" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> applied <span class="delete">at the</span> individual <span class="delete">domain level</span> or <span class="delete">for a set of</span> domains <span class="delete">at the</span></td><td> </td><td class="rblock"> applied <span class="insert">to</span> individual <span class="insert">domains</span> or <span class="insert">to all</span> domains <span class="insert">within an</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> organizational level.</span> The design of DMARC precludes grouping</td><td> </td><td class="rblock"><span class="insert"> organization.</span> The design of DMARC precludes grouping policies for</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> policies for <span class="delete">a set of</span> domains above the organizational level, such as</td><td> </td><td class="rblock"> domains <span class="insert">based on policy published</span> above the organizational level,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> TLDs (Top Level Domains). <span class="delete">These types</span> of <span class="delete">domains (which are</span> not <span class="delete">all</span></td><td> </td><td class="rblock"> such as TLDs (Top Level Domains). <span class="insert">Domains at this higher level</span> of</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> at the top <span class="delete">level</span> of the DNS tree) can be collectively referred to as</td><td> </td><td class="rblock"> <span class="insert">the DNS tree (but</span> not <span class="insert">necessarily</span> at the top of the DNS tree) can be</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> Public Suffix Domains (PSDs). <span class="delete">For the subset of PSDs that require</span></td><td> </td><td class="rblock"> collectively referred to as Public Suffix Domains (PSDs). <span class="insert">This</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> DMARC usage, this memo</span> describes an extension to DMARC to enable</td><td> </td><td class="rblock"><span class="insert"> document</span> describes an extension to DMARC to enable DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> DMARC functionality <span class="delete">for such domains.</span></td><td> </td><td class="rblock"> functionality <span class="insert">PSDs.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">Status of This Memo</td><td> </td><td class="right">Status of This Memo</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> This Internet-Draft is submitted in full conformance with the</td><td> </td><td class="right"> This Internet-Draft is submitted in full conformance with the</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> provisions of BCP 78 and BCP 79.</td><td> </td><td class="right"> provisions of BCP 78 and BCP 79.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Internet-Drafts are working documents of the Internet Engineering</td><td> </td><td class="right"> Internet-Drafts are working documents of the Internet Engineering</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Task Force (IETF). Note that other groups may also distribute</td><td> </td><td class="right"> Task Force (IETF). Note that other groups may also distribute</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> working documents as Internet-Drafts. The list of current Internet-</td><td> </td><td class="right"> working documents as Internet-Drafts. The list of current Internet-</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Drafts is at https://datatracker.ietf.org/drafts/current/.</td><td> </td><td class="right"> Drafts is at https://datatracker.ietf.org/drafts/current/.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Internet-Drafts are draft documents valid for a maximum of six months</td><td> </td><td class="right"> Internet-Drafts are draft documents valid for a maximum of six months</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> and may be updated, replaced, or obsoleted by other documents at any</td><td> </td><td class="right"> and may be updated, replaced, or obsoleted by other documents at any</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> time. It is inappropriate to use Internet-Drafts as reference</td><td> </td><td class="right"> time. It is inappropriate to use Internet-Drafts as reference</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> material or to cite them other than as "work in progress."</td><td> </td><td class="right"> material or to cite them other than as "work in progress."</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0004" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> This Internet-Draft will expire on <span class="delete">November 28, 2019</span>.</td><td> </td><td class="rblock"> This Internet-Draft will expire on <span class="insert">January 28, 2020</span>.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">Copyright Notice</td><td> </td><td class="right">Copyright Notice</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Copyright (c) 2019 IETF Trust and the persons identified as the</td><td> </td><td class="right"> Copyright (c) 2019 IETF Trust and the persons identified as the</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> document authors. All rights reserved.</td><td> </td><td class="right"> document authors. All rights reserved.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> This document is subject to BCP 78 and the IETF Trust's Legal</td><td> </td><td class="right"> This document is subject to BCP 78 and the IETF Trust's Legal</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Provisions Relating to IETF Documents</td><td> </td><td class="right"> Provisions Relating to IETF Documents</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> (https://trustee.ietf.org/license-info) in effect on the date of</td><td> </td><td class="right"> (https://trustee.ietf.org/license-info) in effect on the date of</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> publication of this document. Please review these documents</td><td> </td><td class="right"> publication of this document. Please review these documents</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> carefully, as they describe your rights and restrictions with respect</td><td> </td><td class="right"> carefully, as they describe your rights and restrictions with respect</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> to this document. Code Components extracted from this document must</td><td> </td><td class="right"> to this document. Code Components extracted from this document must</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> include Simplified BSD License text as described in Section 4.e of</td><td> </td><td class="right"> include Simplified BSD License text as described in Section 4.e of</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> the Trust Legal Provisions and are provided without warranty as</td><td> </td><td class="right"> the Trust Legal Provisions and are provided without warranty as</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> described in the Simplified BSD License.</td><td> </td><td class="right"> described in the Simplified BSD License.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">Table of Contents</td><td> </td><td class="right">Table of Contents</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0005" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">2</span></td><td> </td><td class="rblock"> 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">3</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 2. Terminology and Definitions . . . . . . . . . . . . . . . . . <span class="delete">4</span></td><td> </td><td class="rblock"> 2. Terminology and Definitions . . . . . . . . . . . . . . . . . <span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 2.1. Conventions Used in This Document . . . . . . . . . . . . <span class="delete">4</span></td><td> </td><td class="rblock"> 2.1. Conventions Used in This Document . . . . . . . . . . . . <span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 2.2. Public Suffix Domain (PSD) . . . . . . . . . . . . . . . <span class="delete">4</span></td><td> </td><td class="rblock"> 2.2. Public Suffix Domain (PSD) . . . . . . . . . . . . . . . <span class="insert">5</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> 2.3. Longest PSD . . . . . . . . . . . . . . . . . . . . . . . 5</td><td> </td><td class="right"> 2.3. Longest PSD . . . . . . . . . . . . . . . . . . . . . . . 5</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> 2.4. Public Suffix Operator (PSO) . . . . . . . . . . . . . . 5</td><td> </td><td class="right"> 2.4. Public Suffix Operator (PSO) . . . . . . . . . . . . . . 5</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> 2.5. PSO Controlled Domain Names . . . . . . . . . . . . . . . 5</td><td> </td><td class="right"> 2.5. PSO Controlled Domain Names . . . . . . . . . . . . . . . 5</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> 2.6. Non-existent Domains . . . . . . . . . . . . . . . . . . 5</td><td> </td><td class="right"> 2.6. Non-existent Domains . . . . . . . . . . . . . . . . . . 5</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0006" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 3. PSD DMARC Updates to DMARC Requirements . . . . . . . . . . . <span class="delete">5</span></td><td> </td><td class="rblock"> 3. PSD DMARC Updates to DMARC Requirements . . . . . . . . . . . <span class="insert">6</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 3.1. General Updates . . . . . . . . . . . . . . . . . . . . . <span class="delete">5</span></td><td> </td><td class="rblock"> 3.1. General Updates . . . . . . . . . . . . . . . . . . . . . <span class="insert">6</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 3.2. Section 6.1 DMARC Policy Record . . . . . . . . . . . . . <span class="delete">5</span></td><td> </td><td class="rblock"> 3.2. Section 6.1 DMARC Policy Record . . . . . . . . . . . . . <span class="insert">6</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 3.3. Section 6.5. Domain Owner Actions . . . . . . . . . . . <span class="delete">5</span></td><td> </td><td class="rblock"> 3.3. Section <span class="insert">6.3 General Record Format . . . . . . . . . . . . 6</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> 3.4.</span> Section 6.6.3. Policy Discovery . . . . . . . . . . . . <span class="delete">6</span></td><td> </td><td class="rblock"><span class="insert"> 3.4. Section</span> 6.5. Domain Owner Actions . . . . . . . . . . . <span class="insert">7</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> 3.5.</span> Section 7. DMARC Feedback . . . . . . . . . . . . . . . <span class="delete">6</span></td><td> </td><td class="rblock"><span class="insert"> 3.5.</span> Section 6.6.3. Policy Discovery . . . . . . . . . . . . <span class="insert">7</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 4. Privacy Considerations . . . . . . . . . . . . . . . . . . . <span class="delete">6</span></td><td> </td><td class="rblock"><span class="insert"> 3.6.</span> Section 7. DMARC Feedback . . . . . . . . . . . . . . . <span class="insert">7</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 4.1. Feedback leakage . . . . . . . . . . . . . . . . . . . . <span class="delete">6</span></td><td> </td><td class="rblock"> 4. Privacy Considerations . . . . . . . . . . . . . . . . . . . <span class="insert">7</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 5. Security Considerations . . . . . . . . . . . . . . . . . . . <span class="delete">7</span></td><td> </td><td class="rblock"> 4.1. Feedback leakage . . . . . . . . . . . . . . . . . . . . <span class="insert">8</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . <span class="delete">8</span></td><td> </td><td class="rblock"> 5. Security Considerations . . . . . . . . . . . . . . . . . . . <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 7. References . . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">8</span></td><td> </td><td class="rblock"> 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 7.1. Normative References . . . . . . . . . . . . . . . . . . <span class="delete">8</span></td><td> </td><td class="rblock"><span class="insert"> 6.1. Subdomain Policy Tag . . . . . . . . . . . . . . . . . . 9</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> 7.2. Informative References . . . . . . . . . . . . . . . . . <span class="delete">8</span></td><td> </td><td class="rblock"> 7. References . . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> Appendix A. The Experiment . . . . . . . . . . . . . . . . . . . <span class="delete">9</span></td><td> </td><td class="rblock"> 7.1. Normative References . . . . . . . . . . . . . . . . . . <span class="insert">9</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> Appendix B. DMARC PSD Registry Examples . . . . . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock"> 7.2. Informative References . . . . . . . . . . . . . . . . . <span class="insert">10</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> B.1. DMARC PSD DNS Query Service . . . . . . . . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock"> Appendix A. The Experiment . . . . . . . . . . . . . . . . . . . <span class="insert">11</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> B.2. DMARC Public Suffix Domain (PSD) Registry . . . . . . . . <span class="delete">10</span></td><td> </td><td class="rblock"><span class="insert"> A.1. PSD DMARC Privacy Concern Mitigation . . . . . . . . . . 11</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> Appendix C. Implementation . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock"><span class="insert"> A.2. Non-Existent Subdomain Policy . . . . . . . . . . . . . . 12</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> C.1. Authheaders Module . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock"> Appendix B. DMARC PSD Registry Examples . . . . . . . . . . . . <span class="insert">12</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock"> B.1. DMARC PSD DNS Query Service . . . . . . . . . . . . . . . <span class="insert">12</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> Author's Address . . . . . . . . . . . . . . . . . . . . . . . . <span class="delete">11</span></td><td> </td><td class="rblock"> B.2. DMARC Public Suffix Domain (PSD) Registry . . . . . . . . <span class="insert">12</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> Appendix C. Implementation . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> C.1. Authheaders Module . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> Author's Address . . . . . . . . . . . . . . . . . . . . . . . . <span class="insert">13</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">1. Introduction</td><td> </td><td class="right">1. Introduction</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> DMARC [RFC7489] provides a mechanism for publishing organizational</td><td> </td><td class="right"> DMARC [RFC7489] provides a mechanism for publishing organizational</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0007" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> policy information to email receivers. DMARC <span class="delete">[RFC7489]</span> allows policy</td><td> </td><td class="rblock"> policy information to email receivers. DMARC allows policy to be</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> to be specified for both individual domains and <span class="delete">sets of</span> domains</td><td> </td><td class="rblock"> specified for both individual domains and <span class="insert">for organizational</span> domains</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> within a single organization. For domains <span class="delete">above the organizational</span></td><td> </td><td class="rblock"> <span class="insert">and their sub-domains</span> within a single organization. For <span class="insert">TLDs and</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> level <span class="delete">in the DNS tree,</span> policy can only be published for the exact</td><td> </td><td class="rblock"> domains <span class="insert">that exist between TLDs and organization</span> level <span class="insert">domains,</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> domain. <span class="delete">There is no</span> method available <span class="delete">to</span> such domains to express</td><td> </td><td class="rblock"> policy can only be published for the exact domain. <span class="insert">No</span> method <span class="insert">is</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> <span class="delete">lower level</span> policy or receive feedback reporting for <span class="delete">sets of domains.</span></td><td> </td><td class="rblock"> available <span class="insert">for</span> such domains to express policy or receive feedback</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> This <span class="delete">prevents policy application to</span> non-existent domains and</td><td> </td><td class="rblock"> reporting for <span class="insert">sub-domains.</span> This <span class="insert">missing method allows for the abuse</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> identification of domain abuse in <span class="delete">email, which can be important for</span></td><td> </td><td class="rblock"><span class="insert"> of</span> non-existent <span class="insert">organizational-level</span> domains and <span class="insert">prevents</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> brand and consumer protection.</span></td><td> </td><td class="rblock"> identification of domain abuse in <span class="insert">email.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> As an example, imagine a country code TLD (ccTLD) which has public</td><td> </td><td class="right"> As an example, imagine a country code TLD (ccTLD) which has public</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> subdomains for government and commercial use (.gov.example and</td><td> </td><td class="right"> subdomains for government and commercial use (.gov.example and</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> .com.example). Within the .gov.example public suffix, use of DMARC</td><td> </td><td class="right"> .com.example). Within the .gov.example public suffix, use of DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0008" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> <span class="delete">[RFC7489]</span> has been mandated and .gov.example has published its own</td><td> </td><td class="rblock"> has been mandated and .gov.example has published its own DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> DMARC <span class="delete">[RFC7489]</span> record:</td><td> </td><td class="rblock"> record:</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0009" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> "v=DMARC1;<span class="delete">p=reject;</span>rua=mailto:[email protected]"</td><td> </td><td class="rblock"> "v=DMARC1;<span class="insert"> p=reject; </span>rua=mailto:[email protected]"</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> at</td><td> </td><td class="right"> at</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> _dmarc.gov.example.</td><td> </td><td class="right"> _dmarc.gov.example.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0010" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> This <span class="delete">would provide</span> policy and <span class="delete">feedback</span> for mail sent from</td><td> </td><td class="rblock"> This <span class="insert">DMARC record provides</span> policy and <span class="insert">a reporting destination</span> for</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> <span class="delete">@gov.example, but not @tax.gov.example and there is no way</span> to <span class="delete">publish</span></td><td> </td><td class="rblock"> mail sent from <span class="insert">@gov.example. However, due</span> to <span class="insert">DMARC's current method</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> an organizational level policy that would do so. While, in theory,</span></td><td> </td><td class="rblock"> of <span class="insert">discovering and applying policy at</span> the <span class="insert">organizational</span> domain</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> receivers could reject mail from non-existent domains, not all</span></td><td> </td><td class="rblock"> <span class="insert">level, the non-existent organizational domain of @tax.gov.example</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> receivers do so. Non-existence</span> of the <span class="delete">sending</span> domain <span class="delete">can be a factor</span></td><td> </td><td class="rblock"><span class="insert"> does</span> not <span class="insert">and cannot fall under a DMARC policy.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> in a mail delivery decision, but is</span> not <span class="delete">generally treated as</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> definitive on its own.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0011" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> This <span class="delete">memo</span> provides a simple extension to DMARC [RFC7489] to allow</td><td> </td><td class="rblock"> This <span class="insert">document</span> provides a simple extension to DMARC [RFC7489] to allow</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> operators of Public Suffix Domains (PSDs) to express policy <span class="delete">for</span></td><td> </td><td class="rblock"> operators of Public Suffix Domains (PSDs) to express policy <span class="insert">at the</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> groups</span> of <span class="delete">subdomains,</span> extends the DMARC <span class="delete">[RFC7489]</span> policy query</td><td> </td><td class="rblock"><span class="insert"> level</span> of <span class="insert">the PSD that covers all organizational domains that do not</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> explicitly publish DMARC records,</span> extends the DMARC policy query</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> functionality to detect and process such a policy, describes receiver</td><td> </td><td class="right"> functionality to detect and process such a policy, describes receiver</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> feedback for such policies, and provides controls to mitigate</td><td> </td><td class="right"> feedback for such policies, and provides controls to mitigate</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> potential privacy considerations associated with this extension.</td><td> </td><td class="right"> potential privacy considerations associated with this extension.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0012" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> As an additional benefit, the PSD DMARC extension <span class="delete">will clarify</span></td><td> </td><td class="rblock"> <span class="insert">This document also provides a new DMARC [RFC7489] tag to indicate</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> existing requirements. Based on the requirements of DMARC [RFC7489],</td><td> </td><td class="rblock"><span class="insert"> requested handling policy for non-existent subdommains. This is</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> DMARC should function above the organizational level for exact domain</td><td> </td><td class="rblock"><span class="insert"> provided specifically to support phased deployment of PSD DMARC, but</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> is expected to be useful more generally. Undesired rejection risks</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> for mail purporting to be from domains that do not exist are</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> substantially lower than for those that do, so the operational risk</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> of requesting harsh policy treatment (e.g. reject) is lower.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> </td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> As an additional benefit, the PSD DMARC extension <span class="insert">clarifies</span> existing</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> requirements. Based on the requirements of DMARC [RFC7489], DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> should function above the organizational level for exact domain</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> matches (i.e. if a DMARC record were published for 'example', then</td><td> </td><td class="right"> matches (i.e. if a DMARC record were published for 'example', then</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> mail from example@example should be subject to DMARC processing).</td><td> </td><td class="right"> mail from example@example should be subject to DMARC processing).</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Testing had revealed that this is not consistently applied in</td><td> </td><td class="right"> Testing had revealed that this is not consistently applied in</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0013" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> different implementations. <span class="delete">PSD DMARC will help clarify that DMARC is</span></td><td> </td><td class="rblock"> different implementations.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> not limited to organizational domains and their sub-domains.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> There are two types of Public Suffix Operators (PSOs) for which this</td><td> </td><td class="right"> There are two types of Public Suffix Operators (PSOs) for which this</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> extension would be useful and appropriate:</td><td> </td><td class="right"> extension would be useful and appropriate:</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> o Branded PSDs (e.g., ".google"): These domains are effectively</td><td> </td><td class="right"> o Branded PSDs (e.g., ".google"): These domains are effectively</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Organizational Domains as discussed in DMARC [RFC7489]. They</td><td> </td><td class="right"> Organizational Domains as discussed in DMARC [RFC7489]. They</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> control all subdomains of the tree. These are effectively private</td><td> </td><td class="right"> control all subdomains of the tree. These are effectively private</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> domains, but listed in the Public Suffix List. They are treated</td><td> </td><td class="right"> domains, but listed in the Public Suffix List. They are treated</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0014" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> as Public for DMARC <span class="delete">[RFC7489]</span> purposes. They require the same</td><td> </td><td class="rblock"> as Public for DMARC purposes. They require the same protections</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> protections as DMARC <span class="delete">[RFC7489]</span> Organizational Domains, but are</td><td> </td><td class="rblock"> as DMARC Organizational Domains, but are currently excluded.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> currently excluded.</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> o Multi-organization PSDs that require DMARC usage (e.g., ".bank"):</td><td> </td><td class="right"> o Multi-organization PSDs that require DMARC usage (e.g., ".bank"):</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Because existing Organizational Domains using this PSD have their</td><td> </td><td class="right"> Because existing Organizational Domains using this PSD have their</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> own DMARC policy, the applicability of this extension is for non-</td><td> </td><td class="right"> own DMARC policy, the applicability of this extension is for non-</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> existent domains. The extension allows the brand protection</td><td> </td><td class="right"> existent domains. The extension allows the brand protection</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0015" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> benefits of DMARC <span class="delete">[RFC7489]</span> to extend to the entire PSD, including</td><td> </td><td class="rblock"> benefits of DMARC to extend to the entire PSD, including cousin</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> cousin domains of registered organizations.</td><td> </td><td class="rblock"> domains of registered organizations.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> </td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> <span class="insert">As an example, take the ".gov.example" described above and add that</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> for this entity emails about tax returns are sent from</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> tax.gov.example. It would not be surprising if fraudulent emails</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> were sent purporting to be from taxes.gov.example (taxes is a cousin</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> of tax - different enough to evade DMARC protection, but similar</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> enough to potentially confuse users). As defined in DMARC [RFC7489],</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> a DMARC record could be published for tax.gov.example, but there is</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> no general solution to publishing a DMARC policy to defend against</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> abuse of non-existent cousins such as taxes.gov.example. While an</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> explicit record could be published for this one domain, the universe</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> of possible cousins is such that this approach does not scale.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Due to the design of DMARC [RFC7489] and the nature of the Internet</td><td> </td><td class="right"> Due to the design of DMARC [RFC7489] and the nature of the Internet</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> email architecture [RFC5598], there are interoperability issues</td><td> </td><td class="right"> email architecture [RFC5598], there are interoperability issues</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> associated with DMARC [RFC7489] deployment. These are discussed in</td><td> </td><td class="right"> associated with DMARC [RFC7489] deployment. These are discussed in</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Interoperability Issues between DMARC and Indirect Email Flows</td><td> </td><td class="right"> Interoperability Issues between DMARC and Indirect Email Flows</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0016" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> [RFC7960]. These issues are not applicable to PSDs, since they</td><td> </td><td class="rblock"> [RFC7960]. These issues are not <span class="insert">typically</span> applicable to PSDs, since</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> (e.g., the ".gov.example" used above) do not send mail.</td><td> </td><td class="rblock"> they (e.g., the ".gov.example" used above) do not <span class="insert">typically</span> send</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> </td><td> </td><td class="rblock"> mail.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> <span class="delete">DMARC [RFC7489], by design, does not support usage by PSOs. For PSDs</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> that require use of DMARC [RFC7489], an extension of DMARC reporting</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> and enforcement capability is needed for PSO to effectively manage</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> and monitor implementation of PSD requirements.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">2. Terminology and Definitions</td><td> </td><td class="right">2. Terminology and Definitions</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> This section defines terms used in the rest of the document.</td><td> </td><td class="right"> This section defines terms used in the rest of the document.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">2.1. Conventions Used in This Document</td><td> </td><td class="right">2.1. Conventions Used in This Document</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",</td><td> </td><td class="right"> The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and</td><td> </td><td class="right"> "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> "OPTIONAL" in this document are to be interpreted as described in</td><td> </td><td class="right"> "OPTIONAL" in this document are to be interpreted as described in</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all</td><td> </td><td class="right"> BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> capitals, as shown here.</td><td> </td><td class="right"> capitals, as shown here.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">2.2. Public Suffix Domain (PSD)</td><td> </td><td class="right">2.2. Public Suffix Domain (PSD)</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> The global Internet Domain Name System (DNS) is documented in</td><td> </td><td class="right"> The global Internet Domain Name System (DNS) is documented in</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> numerous Requests for Comment (RFC). It defines a tree of names</td><td> </td><td class="right"> numerous Requests for Comment (RFC). It defines a tree of names</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> starting with root, ".", immediately below which are Top Level Domain</td><td> </td><td class="right"> starting with root, ".", immediately below which are Top Level Domain</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> names such as ".com" and ".us". They are not available for private</td><td> </td><td class="right"> names such as ".com" and ".us". They are not available for private</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> registration. In many cases the public portion of the DNS tree is</td><td> </td><td class="right"> registration. In many cases the public portion of the DNS tree is</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0017" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> more than one level deep. <span class="delete">PSD DMARC includes all public domains</span></td><td> </td><td class="rblock"> more than one level deep.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> above the organizational level in the tree, e.g., ".gov.uk".</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">2.3. Longest PSD</td><td> </td><td class="right">2.3. Longest PSD</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0018" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> Organizational Domain (DMARC [RFC7489] Section 3.2) with one label</td><td> </td><td class="rblock"> Organizational Domain (DMARC [RFC7489] Section 3.2) with one <span class="insert">left-</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> removed.</td><td> </td><td class="rblock"><span class="insert"> most</span> label removed.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">2.4. Public Suffix Operator (PSO)</td><td> </td><td class="right">2.4. Public Suffix Operator (PSO)</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0019" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> A Public Suffix Operator manages operations within <span class="delete">their</span> PSD.</td><td> </td><td class="rblock"> A Public Suffix Operator manages operations within <span class="insert">its</span> PSD.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">2.5. PSO Controlled Domain Names</td><td> </td><td class="right">2.5. PSO Controlled Domain Names</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> PSO Controlled Domain Names are names in the DNS that are managed by</td><td> </td><td class="right"> PSO Controlled Domain Names are names in the DNS that are managed by</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> a PSO and are not available for use as Organizational Domains (the</td><td> </td><td class="right"> a PSO and are not available for use as Organizational Domains (the</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> term Organizational Domains is defined in DMARC [RFC7489]</td><td> </td><td class="right"> term Organizational Domains is defined in DMARC [RFC7489]</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Section 3.2). Depending on PSD policy, these will have one (e.g.,</td><td> </td><td class="right"> Section 3.2). Depending on PSD policy, these will have one (e.g.,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> ".com") or more (e.g., ".co.uk") name components.</td><td> </td><td class="right"> ".com") or more (e.g., ".co.uk") name components.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">2.6. Non-existent Domains</td><td> </td><td class="right">2.6. Non-existent Domains</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0020" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> For DMARC <span class="delete">[RFC7489]</span> purposes, a non-existent domain is a domain <span class="delete">name</span></td><td> </td><td class="rblock"> For DMARC purposes, a non-existent domain is a domain <span class="insert">for which there</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> that publishes none of</span> A, AAAA, <span class="delete">or</span> MX <span class="delete">records that the receiver is</span></td><td> </td><td class="rblock"><span class="insert"> is an NXDOMAIN or NODATA response for</span> A, AAAA, <span class="insert">and</span> MX <span class="insert">records.</span> This</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> willing to accept.</span> This is a broader definition than that in</td><td> </td><td class="rblock"> is a broader definition than that in NXDOMAIN [RFC8020].</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> NXDOMAIN [RFC8020].</td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">3. PSD DMARC Updates to DMARC Requirements</td><td> </td><td class="right">3. PSD DMARC Updates to DMARC Requirements</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> This document updates DMARC [RFC7489] as follows:</td><td> </td><td class="right"> This document updates DMARC [RFC7489] as follows:</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">3.1. General Updates</td><td> </td><td class="right">3.1. General Updates</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> References to "Domain Owners" also apply to PSOs.</td><td> </td><td class="right"> References to "Domain Owners" also apply to PSOs.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">3.2. Section 6.1 DMARC Policy Record</td><td> </td><td class="right">3.2. Section 6.1 DMARC Policy Record</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> PSD DMARC records are published as a subdomain of the PSD. For the</td><td> </td><td class="right"> PSD DMARC records are published as a subdomain of the PSD. For the</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> PSD ".example", the PSO would post DMARC policy in a TXT record at</td><td> </td><td class="right"> PSD ".example", the PSO would post DMARC policy in a TXT record at</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> "_dmarc.example".</td><td> </td><td class="right"> "_dmarc.example".</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0021" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock">3.3. Section 6.<span class="delete">5. Domain Owner Actions</span></td><td> </td><td class="rblock">3.3. Section 6.<span class="insert">3 General Record Format</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0022" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> <span class="delete">In addition to the DMARC [RFC7489] domain owner actions, PSOs that</span></td><td> </td><td class="rblock"> <span class="insert">A new tag is added after fo:</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> require use of DMARC ought to make that information available to</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"><span class="delete"> receivers.</span></td><td> </td><td class="rblock"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0023" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock">3.4. Section 6.6.3. Policy Discovery</td><td> </td><td class="rblock"> <span class="insert">np: Requested Mail Receiver policy for non-existent subdomains</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> (plain-text; OPTIONAL). Indicates the policy to be enacted by the</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> Receiver at the request of the Domain Owner. It applies only to</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> non-existent subdomains of the domain queried and not to either</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> existing subdomains or the domain itself. Its syntax is identical</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> to that of the "p" tag defined below. If the 'np' tag is absent,</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> the policy specified by the "sp" tag (if the 'sp' tag is present)</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> or the policy specified by the "p" tag, if the 'sp' tag is not</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> present, MUST be applied for non-existent subdomains. Note that</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> "np" will be ignored for DMARC records published on subdomains of</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> Organizational Domains and PSDs due to the effect of the DMARC</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> policy discovery mechanism described in DMARC [RFC7489]</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> Section 6.6.3.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> The following tag definitions from DMARC [RFC7489] are updated:</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> p: The sentence 'Policy applies to the domain queried and to</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> subdomains, unless subdomain policy is explicitly described using</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> the "sp" tag' is updated to read 'Policy applies to the domain</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> queried and to subdomains, unless subdomain policy is explicitly</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> described using the "sp" or "np" tags.'</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> sp: The sentence 'If absent, the policy specified by the "p" tag</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> MUST be applied for subdomains' is updated to read 'If both the</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> 'sp' tag is absent and the 'np' tag is either absent or not</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> applicable, the policy specified by the "p" tag MUST be applied</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> for subdomains.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> </td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock">3.4. <span class="insert">Section 6.5. Domain Owner Actions</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> In addition to the DMARC domain owner actions, PSOs that require use</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> of DMARC and participate in PSD DMARC ought to make that information</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> available to receivers. The mechanism for doing so is one of the</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> experimental elements of this document. See the experiment</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> description (Appendix A).</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">3.5.</span> Section 6.6.3. Policy Discovery</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> A new step between step 3 and 4 is added:</td><td> </td><td class="right"> A new step between step 3 and 4 is added:</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> 3A. If the set is now empty and the longest PSD (Section 2.3) of the</td><td> </td><td class="right"> 3A. If the set is now empty and the longest PSD (Section 2.3) of the</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Organizational Domain is one that the receiver has determined is</td><td> </td><td class="right"> Organizational Domain is one that the receiver has determined is</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0024" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> acceptable for PSD <span class="delete">DMARC,</span> the Mail Receiver MUST query the DNS for</td><td> </td><td class="rblock"> acceptable for PSD <span class="insert">DMARC (discussed in the experiment description</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> a DMARC TXT record at the DNS domain matching the longest PSD</td><td> </td><td class="rblock"><span class="insert"> (Appendix A)),</span> the Mail Receiver MUST query the DNS for a DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> TXT record at the DNS domain matching the longest PSD</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> (Section 2.3) in place of the RFC5322.From domain in the message</td><td> </td><td class="right"> (Section 2.3) in place of the RFC5322.From domain in the message</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> (if different). A possibly empty set of records is returned.</td><td> </td><td class="right"> (if different). A possibly empty set of records is returned.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> As an example, for a message with the Organizational Domain of</td><td> </td><td class="right"> As an example, for a message with the Organizational Domain of</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> "example.compute.cloudcompany.com.cctld", the query for PSD DMARC</td><td> </td><td class="right"> "example.compute.cloudcompany.com.cctld", the query for PSD DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> would use "compute.cloudcompany.com.cctld" as the longest PSD</td><td> </td><td class="right"> would use "compute.cloudcompany.com.cctld" as the longest PSD</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> (Section 2.3). The receiver would check to see if that PSD is listed</td><td> </td><td class="right"> (Section 2.3). The receiver would check to see if that PSD is listed</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> in the DMARC PSD Registry, and if so, perform the policy lookup at</td><td> </td><td class="right"> in the DMARC PSD Registry, and if so, perform the policy lookup at</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> "_dmarc.compute.cloudcompany.com.cctld".</td><td> </td><td class="right"> "_dmarc.compute.cloudcompany.com.cctld".</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Note: Because the PSD policy query comes after the Organizational</td><td> </td><td class="right"> Note: Because the PSD policy query comes after the Organizational</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Domain policy query, PSD policy is not used for Organizational</td><td> </td><td class="right"> Domain policy query, PSD policy is not used for Organizational</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0025" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> domains that have published a DMARC <span class="delete">[RFC7489]</span> policy. Specifically,</td><td> </td><td class="rblock"> domains that have published a DMARC policy. Specifically, this is</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> this is not a mechanism to provide feedback addresses (RUA/RUF) when</td><td> </td><td class="rblock"> not a mechanism to provide feedback addresses (RUA/RUF) when an</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> an Organizational Domain has declined to do so.</td><td> </td><td class="rblock"> Organizational Domain has declined to do so.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0026" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock">3.<span class="delete">5</span>. Section 7. DMARC Feedback</td><td> </td><td class="rblock">3.<span class="insert">6</span>. Section 7. DMARC Feedback</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Operational note for PSD DMARC: For PSOs, feedback for non-existent</td><td> </td><td class="right"> Operational note for PSD DMARC: For PSOs, feedback for non-existent</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0027" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> domains is <span class="delete">desired</span> and <span class="delete">useful.</span> See Section 4 for discussion of</td><td> </td><td class="rblock"> domains is <span class="insert">desirable</span> and <span class="insert">useful, just as it is for org-level DMARC</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> Privacy Considerations.</td><td> </td><td class="rblock"><span class="insert"> operators.</span> See Section 4 <span class="insert">of this document</span> for discussion of Privacy</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> Considerations.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">4. Privacy Considerations</td><td> </td><td class="right">4. Privacy Considerations</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0028" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> These privacy considerations are developed based on the requireme<span class="delete">tn</span>s</td><td> </td><td class="rblock"> These privacy considerations are developed based on the requireme<span class="insert">nt</span>s</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> of [RFC6973]. The Privacy Considerations of [RFC7489] apply to this</td><td> </td><td class="right"> of [RFC6973]. The Privacy Considerations of [RFC7489] apply to this</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> document.</td><td> </td><td class="right"> document.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">4.1. Feedback leakage</td><td> </td><td class="right">4.1. Feedback leakage</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Providing feedback reporting to PSOs can, in some cases, create</td><td> </td><td class="right"> Providing feedback reporting to PSOs can, in some cases, create</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> leakage of information outside of an organization to the PSO. This</td><td> </td><td class="right"> leakage of information outside of an organization to the PSO. This</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0029" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> leakage could <span class="delete">be </span>potentially be utilized as part of a program of</td><td> </td><td class="rblock"> leakage could potentially be utilized as part of a program of</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> pervasive surveillance (See [RFC7624]). There are roughly three</td><td> </td><td class="right"> pervasive surveillance (See [RFC7624]). There are roughly three</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> cases to consider:</td><td> </td><td class="right"> cases to consider:</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> o Single Organization PSDs (e.g., ".google"), RUA and RUF reports</td><td> </td><td class="right"> o Single Organization PSDs (e.g., ".google"), RUA and RUF reports</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> based on PSD DMARC have the potential to contain information about</td><td> </td><td class="right"> based on PSD DMARC have the potential to contain information about</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> emails related to entities managed by the organization. Since</td><td> </td><td class="right"> emails related to entities managed by the organization. Since</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> both the PSO and the Organizational Domain owners are common,</td><td> </td><td class="right"> both the PSO and the Organizational Domain owners are common,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> there is no additional privacy risk for either normal or non-</td><td> </td><td class="right"> there is no additional privacy risk for either normal or non-</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> existent Domain reporting due to PSD DMARC.</td><td> </td><td class="right"> existent Domain reporting due to PSD DMARC.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
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<tr><td class="lineno" valign="top"></td><td class="left"> compliance with PSD policy. Data on non-existent cousin domains</td><td> </td><td class="right"> compliance with PSD policy. Data on non-existent cousin domains</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> would be sent to the PSO.</td><td> </td><td class="right"> would be sent to the PSO.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> o Multi-organization PSDs (e.g., ".com") that do not mandate DMARC</td><td> </td><td class="right"> o Multi-organization PSDs (e.g., ".com") that do not mandate DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> usage: Privacy risks for Organizational Domains that have not</td><td> </td><td class="right"> usage: Privacy risks for Organizational Domains that have not</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> deployed DMARC within such PSDs are significant. For non-DMARC</td><td> </td><td class="right"> deployed DMARC within such PSDs are significant. For non-DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Organizational Domains, all DMARC feedback will be directed to the</td><td> </td><td class="right"> Organizational Domains, all DMARC feedback will be directed to the</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> PSO. PSD DMARC is opt-out (by publishing a DMARC record at the</td><td> </td><td class="right"> PSO. PSD DMARC is opt-out (by publishing a DMARC record at the</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Organizational Domain level) vice opt-in, which would be the more</td><td> </td><td class="right"> Organizational Domain level) vice opt-in, which would be the more</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> desirable characteristic. This means that any non-DMARC</td><td> </td><td class="right"> desirable characteristic. This means that any non-DMARC</td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0030" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> organizational domain would have it<span class="delete">'</span>s feedback reports redirected</td><td> </td><td class="rblock"> organizational domain would have its feedback reports redirected</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> to the PSO. The content of such reports, particularly for</td><td> </td><td class="right"> to the PSO. The content of such reports, particularly for</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> existing domains, is privacy sensitive.</td><td> </td><td class="right"> existing domains, is privacy sensitive.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> PSOs will receive feedback on non-existent domains, which may be</td><td> </td><td class="right"> PSOs will receive feedback on non-existent domains, which may be</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> similar to existing Organizational Domains. Feedback related to such</td><td> </td><td class="right"> similar to existing Organizational Domains. Feedback related to such</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> cousin domains have a small risk of carrying information related to</td><td> </td><td class="right"> cousin domains have a small risk of carrying information related to</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> an actual Organizational Domain. To minimize this potential concern,</td><td> </td><td class="right"> an actual Organizational Domain. To minimize this potential concern,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> PSD DMARC feedback is best limited to Aggregate Reports. Feedback</td><td> </td><td class="right"> PSD DMARC feedback is best limited to Aggregate Reports. Feedback</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Reports carry more detailed information and present a greater risk.</td><td> </td><td class="right"> Reports carry more detailed information and present a greater risk.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
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<tr><td class="lineno" valign="top"></td><td class="left"> not particpate in DMARC, any Feedback Reporting related to multi-</td><td> </td><td class="right"> not particpate in DMARC, any Feedback Reporting related to multi-</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> organizational PSDs ought to be limited to non-existent domains</td><td> </td><td class="right"> organizational PSDs ought to be limited to non-existent domains</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> except in cases where the reporter knows that PSO requires use of</td><td> </td><td class="right"> except in cases where the reporter knows that PSO requires use of</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> DMARC.</td><td> </td><td class="right"> DMARC.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">5. Security Considerations</td><td> </td><td class="right">5. Security Considerations</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> This document does not change the Security Considerations of</td><td> </td><td class="right"> This document does not change the Security Considerations of</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [RFC7489] and [RFC7960].</td><td> </td><td class="right"> [RFC7489] and [RFC7960].</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0031" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> <span class="insert">The risks of the issues identified in [RFC7489], Section 12.3, DNS</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> Security, are amplified by PSD DMARC. In particular, DNS cache</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> poisoning (or Name Chaining), see [RFC3833] for details, consequences</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> are increased because a sucessful attack would potentially have a</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> much wider scope.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> </td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> The risks of the issues identified in [RFC7489], Section 12.5,</td><td> </td><td class="right"> The risks of the issues identified in [RFC7489], Section 12.5,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> External Reporting Addresses, are amplified by PSD DMARC. By design,</td><td> </td><td class="right"> External Reporting Addresses, are amplified by PSD DMARC. By design,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> PSD DMARC causes unrequested reporting of feedback to entities</td><td> </td><td class="right"> PSD DMARC causes unrequested reporting of feedback to entities</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> external to the Organizational Domain. This is discussed in more</td><td> </td><td class="right"> external to the Organizational Domain. This is discussed in more</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> detail in Section 4.</td><td> </td><td class="right"> detail in Section 4.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">6. IANA Considerations</td><td> </td><td class="right">6. IANA Considerations</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0032" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> This <span class="delete">document does not require any</span> IANA <span class="delete">actions.</span></td><td> </td><td class="rblock"> This <span class="insert">section describes actions requested to be completed by IANA.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">6.1. Subdomain Policy Tag</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> </td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> IANA <span class="insert">is requested to add a new tag to DMARC Tag Registry in the</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> Domain-based Message Authentication, Reporting, and Conformance</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> (DMARC) Parameters Registry.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> The entry is as follows:</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> +----------+-----------+---------+-------------------------------+</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> | Tag Name | Reference | Status | Description |</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> +----------+-----------+---------+-------------------------------+</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> | np | this | current | Requested handling policy for |</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> | | document | | non-existent subdomains |</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> +----------+-----------+---------+-------------------------------+</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">7. References</td><td> </td><td class="right">7. References</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">7.1. Normative References</td><td> </td><td class="right">7.1. Normative References</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate</td><td> </td><td class="right"> [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Requirement Levels", BCP 14, RFC 2119,</td><td> </td><td class="right"> Requirement Levels", BCP 14, RFC 2119,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> DOI 10.17487/RFC2119, March 1997,</td><td> </td><td class="right"> DOI 10.17487/RFC2119, March 1997,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> <https://www.rfc-editor.org/info/rfc2119>.</td><td> </td><td class="right"> <https://www.rfc-editor.org/info/rfc2119>.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
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<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">7.2. Informative References</td><td> </td><td class="right">7.2. Informative References</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [psddmarc.org]</td><td> </td><td class="right"> [psddmarc.org]</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> multiple, "PSD DMARC Web Site", April 2019,</td><td> </td><td class="right"> multiple, "PSD DMARC Web Site", April 2019,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> <https://psddmarc.org/>.</td><td> </td><td class="right"> <https://psddmarc.org/>.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [PSL] multiple, "Public Suffix List", April 2019,</td><td> </td><td class="right"> [PSL] multiple, "Public Suffix List", April 2019,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> <https://publicsuffix.org/>.</td><td> </td><td class="right"> <https://publicsuffix.org/>.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0033" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> <span class="insert">[RFC3833] Atkins, D. and R. Austein, "Threat Analysis of the Domain</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> Name System (DNS)", RFC 3833, DOI 10.17487/RFC3833, August</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> 2004, <https://www.rfc-editor.org/info/rfc3833>.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> </td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an</td><td> </td><td class="right"> [RFC5226] Narten, T. and H. Alvestrand, "Guidelines for Writing an</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> IANA Considerations Section in RFCs", RFC 5226,</td><td> </td><td class="right"> IANA Considerations Section in RFCs", RFC 5226,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> DOI 10.17487/RFC5226, May 2008,</td><td> </td><td class="right"> DOI 10.17487/RFC5226, May 2008,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> <https://www.rfc-editor.org/info/rfc5226>.</td><td> </td><td class="right"> <https://www.rfc-editor.org/info/rfc5226>.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [RFC5598] Crocker, D., "Internet Mail Architecture", RFC 5598,</td><td> </td><td class="right"> [RFC5598] Crocker, D., "Internet Mail Architecture", RFC 5598,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> DOI 10.17487/RFC5598, July 2009,</td><td> </td><td class="right"> DOI 10.17487/RFC5598, July 2009,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> <https://www.rfc-editor.org/info/rfc5598>.</td><td> </td><td class="right"> <https://www.rfc-editor.org/info/rfc5598>.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [RFC6973] Cooper, A., Tschofenig, H., Aboba, B., Peterson, J.,</td><td> </td><td class="right"> [RFC6973] Cooper, A., Tschofenig, H., Aboba, B., Peterson, J.,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
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<tr><td class="lineno" valign="top"></td><td class="left"> and Conformance (DMARC) and Indirect Email Flows",</td><td> </td><td class="right"> and Conformance (DMARC) and Indirect Email Flows",</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> RFC 7960, DOI 10.17487/RFC7960, September 2016,</td><td> </td><td class="right"> RFC 7960, DOI 10.17487/RFC7960, September 2016,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> <https://www.rfc-editor.org/info/rfc7960>.</td><td> </td><td class="right"> <https://www.rfc-editor.org/info/rfc7960>.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [RFC8020] Bortzmeyer, S. and S. Huque, "NXDOMAIN: There Really Is</td><td> </td><td class="right"> [RFC8020] Bortzmeyer, S. and S. Huque, "NXDOMAIN: There Really Is</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> Nothing Underneath", RFC 8020, DOI 10.17487/RFC8020,</td><td> </td><td class="right"> Nothing Underneath", RFC 8020, DOI 10.17487/RFC8020,</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> November 2016, <https://www.rfc-editor.org/info/rfc8020>.</td><td> </td><td class="right"> November 2016, <https://www.rfc-editor.org/info/rfc8020>.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">Appendix A. The Experiment</td><td> </td><td class="right">Appendix A. The Experiment</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0034" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> <span class="insert">There are two experimental questions addressed in this document: one</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> regarding mitigation of PSD related privacy concerns and the other on</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> the utility of specifying separate DMARC policies for non-existent</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> sub-domains.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> Aditionally, as of the writing of this document operational and</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> policy constraints prevent this experiment from being deployed</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> globally. If the experiment shows that PSD DMARC solves a real</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> problem and can be used at a large scale, the results could prove to</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> be useful in removing constraints outside of the IETF that would</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> permit broader deployment".</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">A.1. PSD DMARC Privacy Concern Mitigation</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> </td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> To mitigate the privacy concerns associated with Multi-organization</td><td> </td><td class="right"> To mitigate the privacy concerns associated with Multi-organization</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> PSDs that do not mandate DMARC usage, see Section 4.1, a mechanism to</td><td> </td><td class="right"> PSDs that do not mandate DMARC usage, see Section 4.1, a mechanism to</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> indicate which PSDs do not present this privacy risk is appropriate.</td><td> </td><td class="right"> indicate which PSDs do not present this privacy risk is appropriate.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> There are multiple approaches that are possible.</td><td> </td><td class="right"> There are multiple approaches that are possible.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> The experiment is to evaluate different possible approaches. The</td><td> </td><td class="right"> The experiment is to evaluate different possible approaches. The</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> experiment will be complete when there is rough consensus on a</td><td> </td><td class="right"> experiment will be complete when there is rough consensus on a</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> technical approach that is demonstrated to be operationally usable</td><td> </td><td class="right"> technical approach that is demonstrated to be operationally usable</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> and effective at mitigating the privacy concern.</td><td> </td><td class="right"> and effective at mitigating the privacy concern.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno"></td></tr>
<tr bgcolor="gray" ><td></td><th><a name="part-l6" /><small>skipping to change at</small><em> page 10, line 15</em></th><th> </th><th><a name="part-r6" /><small>skipping to change at</small><em> page 12, line 22</em></th><td></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> As of this writing, three approaches have been proposed. None of</td><td> </td><td class="right"> As of this writing, three approaches have been proposed. None of</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> them are ideal:</td><td> </td><td class="right"> them are ideal:</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> o An extension to the Public Suffix List at [PSL]</td><td> </td><td class="right"> o An extension to the Public Suffix List at [PSL]</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> o A dedicated registry queried via DNS - an example of such a</td><td> </td><td class="right"> o A dedicated registry queried via DNS - an example of such a</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> service is described in Appendix B.1 below</td><td> </td><td class="right"> service is described in Appendix B.1 below</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> o An IANA registry</td><td> </td><td class="right"> o An IANA registry</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0035" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert">A.2. Non-Existent Subdomain Policy</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> PSOs that plan to implement PSD DMARC have indicated that the ability</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> to describe distinct policies for existing and non- existing sub-</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> domains would facilitate PSD DMARC deployment. There are also</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> suggestions that it would be more generally useful for DMARC.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"></span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> During the period of the experiment, uptake of the new 'np' tag will</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> be evaluated to support assessment of the utility of including 'np'</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"><span class="insert"> in a future, non-experimental update.</span></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"></td><td> </td><td class="rblock"> </td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">Appendix B. DMARC PSD Registry Examples</td><td> </td><td class="right">Appendix B. DMARC PSD Registry Examples</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td><a name="diff0036" /></td></tr>
<tr><td class="lineno" valign="top"></td><td class="lblock"> To faciliate experimentation around data leakage mitigation, samples</td><td> </td><td class="rblock"> To facili<span class="insert">t</span>ate experimentation around data leakage mitigation, samples</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> of the DNS based and IANA like registries are available at</td><td> </td><td class="right"> of the DNS based and IANA like registries are available at</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [psddmarc.org].</td><td> </td><td class="right"> [psddmarc.org].</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left">B.1. DMARC PSD DNS Query Service</td><td> </td><td class="right">B.1. DMARC PSD DNS Query Service</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> A sample stand-alone DNS query service is available at</td><td> </td><td class="right"> A sample stand-alone DNS query service is available at</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> [psddmarc.org]. It was developed based on the contents suggested for</td><td> </td><td class="right"> [psddmarc.org]. It was developed based on the contents suggested for</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> an IANA registry in an earlier revision of this draft. Usage of the</td><td> </td><td class="right"> an IANA registry in an earlier revision of this draft. Usage of the</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"> service is described on the web site.</td><td> </td><td class="right"> service is described on the web site.</td><td class="lineno" valign="top"></td></tr>
<tr><td class="lineno" valign="top"></td><td class="left"></td><td> </td><td class="right"></td><td class="lineno" valign="top"></td></tr>
<tr><td></td><td class="left"></td><td> </td><td class="right"></td><td></td></tr>
<tr bgcolor="gray"><th colspan="5" align="center"><a name="end"> End of changes. 36 change blocks. </a></th></tr>
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<tr><td colspan="5" align="center" class="small"><br/>This html diff was produced by rfcdiff 1.41. The latest version is available from <a href="http://www.tools.ietf.org/tools/rfcdiff/" >http://tools.ietf.org/tools/rfcdiff/</a> </td></tr>
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