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draft-melnikov-mmhs-profile.html
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<title>Military Message Handling System (MMHS) over SMTP Profile </title>
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<link href="#rfc.toc" rel="Contents">
<link href="#rfc.section.1" rel="Chapter" title="1 Introduction">
<link href="#rfc.section.1.1" rel="Chapter" title="1.1 Overview">
<link href="#rfc.section.1.2" rel="Chapter" title="1.2 MMHS Profile Summary">
<link href="#rfc.section.2" rel="Chapter" title="2 Conventions Used in This Document">
<link href="#rfc.section.3" rel="Chapter" title="3 Elements of Service">
<link href="#rfc.section.3.1" rel="Chapter" title="3.1 Introduction">
<link href="#rfc.section.3.2" rel="Chapter" title="3.2 Profile Support">
<link href="#rfc.section.3.3" rel="Chapter" title="3.3 Basic Elements of Service">
<link href="#rfc.section.3.3.1" rel="Chapter" title="3.3.1 Access Management">
<link href="#rfc.section.3.3.2" rel="Chapter" title="3.3.2 Content Type Indication">
<link href="#rfc.section.3.3.3" rel="Chapter" title="3.3.3 Converted Indication">
<link href="#rfc.section.3.3.4" rel="Chapter" title="3.3.4 Delivery Time Stamp Indication">
<link href="#rfc.section.3.3.5" rel="Chapter" title="3.3.5 MM Identification">
<link href="#rfc.section.3.3.6" rel="Chapter" title="3.3.6 Message Identification">
<link href="#rfc.section.3.3.7" rel="Chapter" title="3.3.7 Non-delivery Notification">
<link href="#rfc.section.3.3.8" rel="Chapter" title="3.3.8 Original Encoded Information Types">
<link href="#rfc.section.3.3.9" rel="Chapter" title="3.3.9 Submission Time Stamp Indication">
<link href="#rfc.section.3.3.10" rel="Chapter" title="3.3.10 Typed Body">
<link href="#rfc.section.3.3.11" rel="Chapter" title="3.3.11 User/UA Capabilities Registration">
<link href="#rfc.section.3.4" rel="Chapter" title="3.4 Optional Elements of Service">
<link href="#rfc.section.3.4.1" rel="Chapter" title="3.4.1 Alternate Recipient Allowed">
<link href="#rfc.section.3.4.2" rel="Chapter" title="3.4.2 Alternate Recipient Assignment">
<link href="#rfc.section.3.4.3" rel="Chapter" title="3.4.3 Authorizing Users Indication">
<link href="#rfc.section.3.4.4" rel="Chapter" title="3.4.4 Auto-forwarded Indication">
<link href="#rfc.section.3.4.5" rel="Chapter" title="3.4.5 Blind Copy Recipient Indication">
<link href="#rfc.section.3.4.6" rel="Chapter" title="3.4.6 Body Part Encryption Indication">
<link href="#rfc.section.3.4.7" rel="Chapter" title="3.4.7 Conversion Prohibited">
<link href="#rfc.section.3.4.8" rel="Chapter" title="3.4.8 Conversion Prohibition in Case of Loss of Information">
<link href="#rfc.section.3.4.9" rel="Chapter" title="3.4.9 Cross Referencing Indication">
<link href="#rfc.section.3.4.10" rel="Chapter" title="3.4.10 Deferred Delivery">
<link href="#rfc.section.3.4.11" rel="Chapter" title="3.4.11 Deferred Delivery Cancellation">
<link href="#rfc.section.3.4.12" rel="Chapter" title="3.4.12 Delivery Notification">
<link href="#rfc.section.3.4.13" rel="Chapter" title="3.4.13 Designation of Recipient by Directory Name">
<link href="#rfc.section.3.4.14" rel="Chapter" title="3.4.14 Disclosure of Other Recipients">
<link href="#rfc.section.3.4.15" rel="Chapter" title="3.4.15 DL Expansion History Indication">
<link href="#rfc.section.3.4.16" rel="Chapter" title="3.4.16 DL Expansion Prohibited">
<link href="#rfc.section.3.4.17" rel="Chapter" title="3.4.17 Expiry Date Indication">
<link href="#rfc.section.3.4.18" rel="Chapter" title="3.4.18 Explicit Conversion">
<link href="#rfc.section.3.4.19" rel="Chapter" title="3.4.19 Forwarded MM Indication">
<link href="#rfc.section.3.4.20" rel="Chapter" title="3.4.20 Grade of Delivery Selection">
<link href="#rfc.section.3.4.21" rel="Chapter" title="3.4.21 Hold for Delivery">
<link href="#rfc.section.3.4.22" rel="Chapter" title="3.4.22 Incomplete Copy Indication">
<link href="#rfc.section.3.4.23" rel="Chapter" title="3.4.23 Language Indication">
<link href="#rfc.section.3.4.24" rel="Chapter" title="3.4.24 Latest Delivery Designation">
<link href="#rfc.section.3.4.25" rel="Chapter" title="3.4.25 Multi-destination Delivery">
<link href="#rfc.section.3.4.26" rel="Chapter" title="3.4.26 Multi-part Body">
<link href="#rfc.section.3.4.27" rel="Chapter" title="3.4.27 Non-receipt Notification Request Indication">
<link href="#rfc.section.3.4.28" rel="Chapter" title="3.4.28 Obsoleting Indication">
<link href="#rfc.section.3.4.29" rel="Chapter" title="3.4.29 Originator Indication">
<link href="#rfc.section.3.4.30" rel="Chapter" title="3.4.30 Originator Requested Alternate Recipient">
<link href="#rfc.section.3.4.31" rel="Chapter" title="3.4.31 Prevention of Non-delivery Notification">
<link href="#rfc.section.3.4.32" rel="Chapter" title="3.4.32 Primary and Copy Recipients Indication">
<link href="#rfc.section.3.4.33" rel="Chapter" title="3.4.33 Receipt Notification Request Indication">
<link href="#rfc.section.3.4.34" rel="Chapter" title="3.4.34 Redirection Disallowed by Originator">
<link href="#rfc.section.3.4.35" rel="Chapter" title="3.4.35 Redirection of Incoming Messages">
<link href="#rfc.section.3.4.36" rel="Chapter" title="3.4.36 Reply Request Indication">
<link href="#rfc.section.3.4.37" rel="Chapter" title="3.4.37 Replying MM Indication">
<link href="#rfc.section.3.4.38" rel="Chapter" title="3.4.38 Requested Preferred Delivery Method">
<link href="#rfc.section.3.4.39" rel="Chapter" title="3.4.39 Subject Indication">
<link href="#rfc.section.3.4.40" rel="Chapter" title="3.4.40 Use of Distribution List">
<link href="#rfc.section.3.5" rel="Chapter" title="3.5 Military Elements of Service">
<link href="#rfc.section.3.5.1" rel="Chapter" title="3.5.1 Primary Precedence">
<link href="#rfc.section.3.5.2" rel="Chapter" title="3.5.2 Copy Precedence">
<link href="#rfc.section.3.5.3" rel="Chapter" title="3.5.3 Message Type">
<link href="#rfc.section.3.5.4" rel="Chapter" title="3.5.4 Exempted Addresses">
<link href="#rfc.section.3.5.5" rel="Chapter" title="3.5.5 Extended Authorization Info">
<link href="#rfc.section.3.5.6" rel="Chapter" title="3.5.6 Distribution Code">
<link href="#rfc.section.3.5.7" rel="Chapter" title="3.5.7 Message Instructions">
<link href="#rfc.section.3.5.8" rel="Chapter" title="3.5.8 Clear Service">
<link href="#rfc.section.3.5.9" rel="Chapter" title="3.5.9 Other Recipient Indicator">
<link href="#rfc.section.3.5.10" rel="Chapter" title="3.5.10 Originator Reference">
<link href="#rfc.section.3.5.11" rel="Chapter" title="3.5.11 Use of Address List">
<link href="#rfc.section.3.6" rel="Chapter" title="3.6 Transition Elements of Service">
<link href="#rfc.section.3.6.1" rel="Chapter" title="3.6.1 Handling Instructions">
<link href="#rfc.section.3.6.2" rel="Chapter" title="3.6.2 Pilot Forwarded">
<link href="#rfc.section.3.6.3" rel="Chapter" title="3.6.3 Corrections">
<link href="#rfc.section.3.6.4" rel="Chapter" title="3.6.4 ACP 127 Message Identifier">
<link href="#rfc.section.3.6.5" rel="Chapter" title="3.6.5 Originator PLAD">
<link href="#rfc.section.3.6.6" rel="Chapter" title="3.6.6 Codress Message Indicator">
<link href="#rfc.section.3.6.7" rel="Chapter" title="3.6.7 ACP 127 Notification Request">
<link href="#rfc.section.3.6.8" rel="Chapter" title="3.6.8 ACP 127 Notification Response">
<link href="#rfc.section.4" rel="Chapter" title="4 Security Services">
<link href="#rfc.section.4.1" rel="Chapter" title="4.1 General Security Elements of Service">
<link href="#rfc.section.4.1.1" rel="Chapter" title="4.1.1 Access Control">
<link href="#rfc.section.4.1.2" rel="Chapter" title="4.1.2 Authentication of Origin">
<link href="#rfc.section.4.1.3" rel="Chapter" title="4.1.3 Non-repudiation of Origin">
<link href="#rfc.section.4.1.4" rel="Chapter" title="4.1.4 Message Integrity">
<link href="#rfc.section.4.1.5" rel="Chapter" title="4.1.5 Message Data Separation">
<link href="#rfc.section.4.1.6" rel="Chapter" title="4.1.6 Security Labels">
<link href="#rfc.section.4.1.7" rel="Chapter" title="4.1.7 Non-repudiation of Receipt">
<link href="#rfc.section.4.1.8" rel="Chapter" title="4.1.8 Secure Mailing Lists">
<link href="#rfc.section.4.1.9" rel="Chapter" title="4.1.9 Message Counter Signature">
<link href="#rfc.section.4.1.10" rel="Chapter" title="4.1.10 Certificate Binding">
<link href="#rfc.section.4.1.11" rel="Chapter" title="4.1.11 Compressed Data">
<link href="#rfc.section.4.2" rel="Chapter" title="4.2 Security Profile">
<link href="#rfc.section.4.2.1" rel="Chapter" title="4.2.1 S/MIME Cryptographic Message Syntax Content Types">
<link href="#rfc.section.4.2.1.1" rel="Chapter" title="4.2.1.1 Data Content Type">
<link href="#rfc.section.4.2.1.2" rel="Chapter" title="4.2.1.2 Signed-data Content Type">
<link href="#rfc.section.4.2.1.2.1" rel="Chapter" title="4.2.1.2.1 SignedData Type">
<link href="#rfc.section.4.2.1.2.2" rel="Chapter" title="4.2.1.2.2 SignerInfo Type">
<link href="#rfc.section.4.2.1.3" rel="Chapter" title="4.2.1.3 Enveloped-data Content Type">
<link href="#rfc.section.4.2.1.3.1" rel="Chapter" title="4.2.1.3.1 EnvelopedData Type">
<link href="#rfc.section.4.2.1.3.1.1" rel="Chapter" title="4.2.1.3.1.1 RecipientInfo Type">
<link href="#rfc.section.4.2.1.4" rel="Chapter" title="4.2.1.4 Compressed-Data Content Type">
<link href="#rfc.section.4.2.1.4.1" rel="Chapter" title="4.2.1.4.1 CompressedData Type">
<link href="#rfc.section.4.2.2" rel="Chapter" title="4.2.2 S/MIME Triple Wrapping">
<link href="#rfc.section.4.2.3" rel="Chapter" title="4.2.3 Organisation to Organisation Security">
<link href="#rfc.section.4.2.4" rel="Chapter" title="4.2.4 DKIM Digital Signatures">
<link href="#rfc.section.4.2.5" rel="Chapter" title="4.2.5 Security Labels">
<link href="#rfc.section.4.2.6" rel="Chapter" title="4.2.6 Message Header Fields">
<link href="#rfc.section.5" rel="Chapter" title="5 Requirements on Mail User Agents">
<link href="#rfc.section.5.1" rel="Chapter" title="5.1 Standards Compliance">
<link href="#rfc.section.5.2" rel="Chapter" title="5.2 Audit Trail and Logging">
<link href="#rfc.section.6" rel="Chapter" title="6 Requirements on Mail Submission Agents">
<link href="#rfc.section.6.1" rel="Chapter" title="6.1 Standards Compliance">
<link href="#rfc.section.6.2" rel="Chapter" title="6.2 Audit Trail and Logging">
<link href="#rfc.section.7" rel="Chapter" title="7 Requirements on Mail Transfer Agents">
<link href="#rfc.section.7.1" rel="Chapter" title="7.1 Standards Compliance">
<link href="#rfc.section.7.2" rel="Chapter" title="7.2 Audit Trail and Logging">
<link href="#rfc.section.8" rel="Chapter" title="8 IANA Considerations">
<link href="#rfc.section.9" rel="Chapter" title="9 Security Considerations">
<link href="#rfc.references" rel="Chapter" title="10 References">
<link href="#rfc.references.1" rel="Chapter" title="10.1 Normative References">
<link href="#rfc.references.2" rel="Chapter" title="10.2 Informative References">
<link href="#rfc.appendix.Appendix%20A" rel="Chapter" title="Appendix A Acknowledgements">
<link href="#rfc.authors" rel="Chapter">
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<meta name="dct.abstract" content="A Military Message Handling System (MMHS) processes formal messages ensuring release, distribution, security, and timely delivery across national and international strategic and tactical networks. The MMHS Elements of Service have been defined as a set of extensions to the ITU-T X.400 (1992) international standards and are specified in STANAG 4406 Edition 2 or ACP 123. " />
<meta name="description" content="A Military Message Handling System (MMHS) processes formal messages ensuring release, distribution, security, and timely delivery across national and international strategic and tactical networks. The MMHS Elements of Service have been defined as a set of extensions to the ITU-T X.400 (1992) international standards and are specified in STANAG 4406 Edition 2 or ACP 123. " />
<meta name="keywords" content="MMHS, SMTP, email, elements of service" />
</head>
<body>
<table class="header">
<tbody>
<tr>
<td class="left">Network Working Group</td>
<td class="right">A. Melnikov</td>
</tr>
<tr>
<td class="left">Internet-Draft</td>
<td class="right">Isode Ltd</td>
</tr>
<tr>
<td class="left">Intended status: Informational</td>
<td class="right">G. Lunt</td>
</tr>
<tr>
<td class="left"></td>
<td class="right">A. Ross</td>
</tr>
<tr>
<td class="left"></td>
<td class="right">SMHS Ltd</td>
</tr>
<tr>
<td class="left"></td>
<td class="right">2014</td>
</tr>
</tbody>
</table>
<p class="title">Military Message Handling System (MMHS) over SMTP Profile <br />
<span class="filename">draft-melnikov-mmhs-profile-08</span></p>
<h1 id="rfc.abstract"><a href="#rfc.abstract">Abstract</a></h1>
<p>A Military Message Handling System (MMHS) processes formal messages ensuring release, distribution, security, and timely delivery across national and international strategic and tactical networks. The MMHS Elements of Service have been defined as a set of extensions to the ITU-T X.400 (1992) international standards and are specified in STANAG 4406 Edition 2 or ACP 123. </p>
<p>This document specifies how a messaging service that meets these service definitions can be provided using the SMTP family of protocols. It defines a profile that can be used by those wishing to ensure that these services are provided. </p>
<h1 id="rfc.status"><a href="#rfc.status">Status of this Memo</a></h1>
<p>This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.</p>
<p>Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/.</p>
<p>Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."</p>
<h1 id="rfc.copyrightnotice"><a href="#rfc.copyrightnotice">Copyright Notice</a></h1>
<p>Copyright (c) 2014 IETF Trust and the persons identified as the document authors. All rights reserved.</p>
<p>This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.</p>
<hr class="noprint" />
<h1 class="np" id="rfc.toc"><a href="#rfc.toc">Table of Contents</a></h1>
<ul class="toc">
<li>1. <a href="#rfc.section.1">Introduction</a>
</li>
<li>1.1. <a href="#rfc.section.1.1">Overview</a>
</li>
<li>1.2. <a href="#rfc.section.1.2">MMHS Profile Summary</a>
</li>
<li>2. <a href="#rfc.section.2">Conventions Used in This Document</a>
</li>
<li>3. <a href="#rfc.section.3">Elements of Service</a>
</li>
<li>3.1. <a href="#rfc.section.3.1">Introduction</a>
</li>
<li>3.2. <a href="#rfc.section.3.2">Profile Support</a>
</li>
<li>3.3. <a href="#rfc.section.3.3">Basic Elements of Service</a>
</li>
<li>3.3.1. <a href="#rfc.section.3.3.1">Access Management</a>
</li>
<li>3.3.2. <a href="#rfc.section.3.3.2">Content Type Indication</a>
</li>
<li>3.3.3. <a href="#rfc.section.3.3.3">Converted Indication</a>
</li>
<li>3.3.4. <a href="#rfc.section.3.3.4">Delivery Time Stamp Indication</a>
</li>
<li>3.3.5. <a href="#rfc.section.3.3.5">MM Identification</a>
</li>
<li>3.3.6. <a href="#rfc.section.3.3.6">Message Identification</a>
</li>
<li>3.3.7. <a href="#rfc.section.3.3.7">Non-delivery Notification</a>
</li>
<li>3.3.8. <a href="#rfc.section.3.3.8">Original Encoded Information Types</a>
</li>
<li>3.3.9. <a href="#rfc.section.3.3.9">Submission Time Stamp Indication</a>
</li>
<li>3.3.10. <a href="#rfc.section.3.3.10">Typed Body</a>
</li>
<li>3.3.11. <a href="#rfc.section.3.3.11">User/UA Capabilities Registration</a>
</li>
<li>3.4. <a href="#rfc.section.3.4">Optional Elements of Service</a>
</li>
<li>3.4.1. <a href="#rfc.section.3.4.1">Alternate Recipient Allowed</a>
</li>
<li>3.4.2. <a href="#rfc.section.3.4.2">Alternate Recipient Assignment</a>
</li>
<li>3.4.3. <a href="#rfc.section.3.4.3">Authorizing Users Indication</a>
</li>
<li>3.4.4. <a href="#rfc.section.3.4.4">Auto-forwarded Indication</a>
</li>
<li>3.4.5. <a href="#rfc.section.3.4.5">Blind Copy Recipient Indication</a>
</li>
<li>3.4.6. <a href="#rfc.section.3.4.6">Body Part Encryption Indication</a>
</li>
<li>3.4.7. <a href="#rfc.section.3.4.7">Conversion Prohibited</a>
</li>
<li>3.4.8. <a href="#rfc.section.3.4.8">Conversion Prohibition in Case of Loss of Information</a>
</li>
<li>3.4.9. <a href="#rfc.section.3.4.9">Cross Referencing Indication</a>
</li>
<li>3.4.10. <a href="#rfc.section.3.4.10">Deferred Delivery</a>
</li>
<li>3.4.11. <a href="#rfc.section.3.4.11">Deferred Delivery Cancellation</a>
</li>
<li>3.4.12. <a href="#rfc.section.3.4.12">Delivery Notification</a>
</li>
<li>3.4.13. <a href="#rfc.section.3.4.13">Designation of Recipient by Directory Name</a>
</li>
<li>3.4.14. <a href="#rfc.section.3.4.14">Disclosure of Other Recipients</a>
</li>
<li>3.4.15. <a href="#rfc.section.3.4.15">DL Expansion History Indication</a>
</li>
<li>3.4.16. <a href="#rfc.section.3.4.16">DL Expansion Prohibited</a>
</li>
<li>3.4.17. <a href="#rfc.section.3.4.17">Expiry Date Indication</a>
</li>
<li>3.4.18. <a href="#rfc.section.3.4.18">Explicit Conversion</a>
</li>
<li>3.4.19. <a href="#rfc.section.3.4.19">Forwarded MM Indication</a>
</li>
<li>3.4.20. <a href="#rfc.section.3.4.20">Grade of Delivery Selection</a>
</li>
<li>3.4.21. <a href="#rfc.section.3.4.21">Hold for Delivery</a>
</li>
<li>3.4.22. <a href="#rfc.section.3.4.22">Incomplete Copy Indication</a>
</li>
<li>3.4.23. <a href="#rfc.section.3.4.23">Language Indication</a>
</li>
<li>3.4.24. <a href="#rfc.section.3.4.24">Latest Delivery Designation</a>
</li>
<li>3.4.25. <a href="#rfc.section.3.4.25">Multi-destination Delivery</a>
</li>
<li>3.4.26. <a href="#rfc.section.3.4.26">Multi-part Body</a>
</li>
<li>3.4.27. <a href="#rfc.section.3.4.27">Non-receipt Notification Request Indication</a>
</li>
<li>3.4.28. <a href="#rfc.section.3.4.28">Obsoleting Indication</a>
</li>
<li>3.4.29. <a href="#rfc.section.3.4.29">Originator Indication</a>
</li>
<li>3.4.30. <a href="#rfc.section.3.4.30">Originator Requested Alternate Recipient</a>
</li>
<li>3.4.31. <a href="#rfc.section.3.4.31">Prevention of Non-delivery Notification</a>
</li>
<li>3.4.32. <a href="#rfc.section.3.4.32">Primary and Copy Recipients Indication</a>
</li>
<li>3.4.33. <a href="#rfc.section.3.4.33">Receipt Notification Request Indication</a>
</li>
<li>3.4.34. <a href="#rfc.section.3.4.34">Redirection Disallowed by Originator</a>
</li>
<li>3.4.35. <a href="#rfc.section.3.4.35">Redirection of Incoming Messages</a>
</li>
<li>3.4.36. <a href="#rfc.section.3.4.36">Reply Request Indication</a>
</li>
<li>3.4.37. <a href="#rfc.section.3.4.37">Replying MM Indication</a>
</li>
<li>3.4.38. <a href="#rfc.section.3.4.38">Requested Preferred Delivery Method</a>
</li>
<li>3.4.39. <a href="#rfc.section.3.4.39">Subject Indication</a>
</li>
<li>3.4.40. <a href="#rfc.section.3.4.40">Use of Distribution List</a>
</li>
<li>3.5. <a href="#rfc.section.3.5">Military Elements of Service</a>
</li>
<li>3.5.1. <a href="#rfc.section.3.5.1">Primary Precedence</a>
</li>
<li>3.5.2. <a href="#rfc.section.3.5.2">Copy Precedence</a>
</li>
<li>3.5.3. <a href="#rfc.section.3.5.3">Message Type</a>
</li>
<li>3.5.4. <a href="#rfc.section.3.5.4">Exempted Addresses</a>
</li>
<li>3.5.5. <a href="#rfc.section.3.5.5">Extended Authorization Info</a>
</li>
<li>3.5.6. <a href="#rfc.section.3.5.6">Distribution Code</a>
</li>
<li>3.5.7. <a href="#rfc.section.3.5.7">Message Instructions</a>
</li>
<li>3.5.8. <a href="#rfc.section.3.5.8">Clear Service</a>
</li>
<li>3.5.9. <a href="#rfc.section.3.5.9">Other Recipient Indicator</a>
</li>
<li>3.5.10. <a href="#rfc.section.3.5.10">Originator Reference</a>
</li>
<li>3.5.11. <a href="#rfc.section.3.5.11">Use of Address List</a>
</li>
<li>3.6. <a href="#rfc.section.3.6">Transition Elements of Service</a>
</li>
<li>3.6.1. <a href="#rfc.section.3.6.1">Handling Instructions</a>
</li>
<li>3.6.2. <a href="#rfc.section.3.6.2">Pilot Forwarded</a>
</li>
<li>3.6.3. <a href="#rfc.section.3.6.3">Corrections</a>
</li>
<li>3.6.4. <a href="#rfc.section.3.6.4">ACP 127 Message Identifier</a>
</li>
<li>3.6.5. <a href="#rfc.section.3.6.5">Originator PLAD</a>
</li>
<li>3.6.6. <a href="#rfc.section.3.6.6">Codress Message Indicator</a>
</li>
<li>3.6.7. <a href="#rfc.section.3.6.7">ACP 127 Notification Request</a>
</li>
<li>3.6.8. <a href="#rfc.section.3.6.8">ACP 127 Notification Response</a>
</li>
<li>4. <a href="#rfc.section.4">Security Services</a>
</li>
<li>4.1. <a href="#rfc.section.4.1">General Security Elements of Service</a>
</li>
<li>4.1.1. <a href="#rfc.section.4.1.1">Access Control</a>
</li>
<li>4.1.2. <a href="#rfc.section.4.1.2">Authentication of Origin</a>
</li>
<li>4.1.3. <a href="#rfc.section.4.1.3">Non-repudiation of Origin</a>
</li>
<li>4.1.4. <a href="#rfc.section.4.1.4">Message Integrity</a>
</li>
<li>4.1.5. <a href="#rfc.section.4.1.5">Message Data Separation</a>
</li>
<li>4.1.6. <a href="#rfc.section.4.1.6">Security Labels</a>
</li>
<li>4.1.7. <a href="#rfc.section.4.1.7">Non-repudiation of Receipt</a>
</li>
<li>4.1.8. <a href="#rfc.section.4.1.8">Secure Mailing Lists</a>
</li>
<li>4.1.9. <a href="#rfc.section.4.1.9">Message Counter Signature</a>
</li>
<li>4.1.10. <a href="#rfc.section.4.1.10">Certificate Binding</a>
</li>
<li>4.1.11. <a href="#rfc.section.4.1.11">Compressed Data</a>
</li>
<li>4.2. <a href="#rfc.section.4.2">Security Profile</a>
</li>
<li>4.2.1. <a href="#rfc.section.4.2.1">S/MIME Cryptographic Message Syntax Content Types</a>
</li>
<li>4.2.1.1. <a href="#rfc.section.4.2.1.1">Data Content Type</a>
</li>
<li>4.2.1.2. <a href="#rfc.section.4.2.1.2">Signed-data Content Type</a>
</li>
<li>4.2.1.2.1. <a href="#rfc.section.4.2.1.2.1">SignedData Type</a>
</li>
<li>4.2.1.2.2. <a href="#rfc.section.4.2.1.2.2">SignerInfo Type</a>
</li>
<li>4.2.1.3. <a href="#rfc.section.4.2.1.3">Enveloped-data Content Type</a>
</li>
<li>4.2.1.3.1. <a href="#rfc.section.4.2.1.3.1">EnvelopedData Type</a>
</li>
<li>4.2.1.3.1.1. <a href="#rfc.section.4.2.1.3.1.1">RecipientInfo Type</a>
</li>
<li>4.2.1.4. <a href="#rfc.section.4.2.1.4">Compressed-Data Content Type</a>
</li>
<li>4.2.1.4.1. <a href="#rfc.section.4.2.1.4.1">CompressedData Type</a>
</li>
<li>4.2.2. <a href="#rfc.section.4.2.2">S/MIME Triple Wrapping</a>
</li>
<li>4.2.3. <a href="#rfc.section.4.2.3">Organisation to Organisation Security</a>
</li>
<li>4.2.4. <a href="#rfc.section.4.2.4">DKIM Digital Signatures</a>
</li>
<li>4.2.5. <a href="#rfc.section.4.2.5">Security Labels</a>
</li>
<li>4.2.6. <a href="#rfc.section.4.2.6">Message Header Fields</a>
</li>
<li>5. <a href="#rfc.section.5">Requirements on Mail User Agents</a>
</li>
<li>5.1. <a href="#rfc.section.5.1">Standards Compliance</a>
</li>
<li>5.2. <a href="#rfc.section.5.2">Audit Trail and Logging</a>
</li>
<li>6. <a href="#rfc.section.6">Requirements on Mail Submission Agents</a>
</li>
<li>6.1. <a href="#rfc.section.6.1">Standards Compliance</a>
</li>
<li>6.2. <a href="#rfc.section.6.2">Audit Trail and Logging</a>
</li>
<li>7. <a href="#rfc.section.7">Requirements on Mail Transfer Agents</a>
</li>
<li>7.1. <a href="#rfc.section.7.1">Standards Compliance</a>
</li>
<li>7.2. <a href="#rfc.section.7.2">Audit Trail and Logging</a>
</li>
<li>8. <a href="#rfc.section.8">IANA Considerations</a>
</li>
<li>9. <a href="#rfc.section.9">Security Considerations</a>
</li>
<li>10. <a href="#rfc.references">References</a>
</li>
<li>10.1. <a href="#rfc.references.1">Normative References</a>
</li>
<li>10.2. <a href="#rfc.references.2">Informative References</a>
</li>
<li>Appendix A. <a href="#rfc.appendix.Appendix%20A">Acknowledgements</a>
</li>
<li><a href="#rfc.authors">Authors' Addresses</a>
</li>
</ul>
<h1 id="rfc.section.1">
<a href="#rfc.section.1">1.</a> Introduction</h1>
<h1 id="rfc.section.1.1">
<a href="#rfc.section.1.1">1.1.</a> Overview</h1>
<p id="rfc.section.1.1.p.1">A Military Message Handling System (MMHS) processes formal messages ensuring release, distribution, security, and timely delivery across national and international strategic and tactical networks. The MMHS Elements of Service are defined as a set of extensions to the ITU-T X.400 (1992) international standards and are specified in STANAG 4406 Edition 2 or <a href="#ACP123">[ACP123]</a>. This document specifies an MMHS Profile for how a comparable messaging service can be provided using Email Message Format <a href="#RFC5322">[RFC5322]</a>, SMTP <a href="#RFC5321">[RFC5321]</a> and their extensions. </p>
<h1 id="rfc.section.1.2">
<a href="#rfc.section.1.2">1.2.</a> MMHS Profile Summary</h1>
<p id="rfc.section.1.2.p.1">This non-normative section provides a summary of the sections in this document that specifies the MMHS Profile; refer to the sections that follow for a normative specification of the MMHS Profile. </p>
<p id="rfc.section.1.2.p.2">The fundamental purpose of STANAG 4406 Edition 2 or <a href="#ACP123">[ACP123]</a> is to define a common message service to be provided between all participating organisations (or domains). STANAG 4406 Edition 2 and <a href="#ACP123">[ACP123]</a> achieve this by defining the Military Messaging Elements of Service (EoS) that are required to be supported. <a href="#ACP123">[ACP123]</a> defines EoS as 'abstractions that describe features of a system for which the user of that system has direct access'. Note for the purposes of this MMHS Profile a 'user' can be described as: an end user; an organisation (or domain); a Mail User Agent (MUA); a Mail Submission Agent (MSA); or, a Mail Transfer Agent (MTA). </p>
<p id="rfc.section.1.2.p.3">The MMHS Profile adopts the EoS defined in <a href="#ACP123">[ACP123]</a>. </p>
<p><a href="#Elements-of-Service">Section 3</a> provides a developer-friendly summary (<a href="#Profile-Support">Section 3.2</a>) and a detailed definition (<a href="#Basic-Elements-of-Service">Section 3.3</a>, <a href="#Optional-Elements-of-Service">Section 3.4</a> and <a href="#Military-Elements-of-Service">Section 3.5</a>) that specifies: </p>
<ul>
<li>the mandatory and optional EoS to be supported in order to claim conformance to this MMHS Profile; and, </li>
<li>the relevant IETF RFC Standard that provides the comparable EoS. </li>
</ul>
<p> </p>
<p><a href="#Security-Services">Section 4</a> describes generic security services independent of the mechanisms used to provide the security (<a href="#General-Security-Elements-of-Service">Section 4.1</a>) and profiles the use of Secure Multipurpose Internet Mail Extensions (S/MIME) protocols (<a href="#RFC5751">[RFC5751]</a>, <a href="#RFC5652">[RFC5652]</a> and <a href="#RFC2634">[RFC2634]</a>) and DomainKeys Identified Mail (DKIM) Signatures (<a href="#RFC6376">[RFC6376]</a>) for implementing these security services (<a href="#Security-Profile">Section 4.2</a>). </p>
<p id="rfc.section.1.2.p.6">In order to implement an MMHS a number of components are typically deployed to support <a href="#ACP123">[ACP123]</a>. The MMHS profile (defined in this document) identifies the requirements on the following SMTP MMHS components in order to claim conformance with the EoS specified in <a href="#Elements-of-Service">Section 3</a> and the security services specified in <a href="#Security-Services">Section 4</a> (Note: additional SMTP extensions that provide additional SMTP functionality but do not have equivalent <a href="#ACP123">[ACP123]</a> EoS are also included in these sections): </p>
<ul>
<li>Mail User Agent (<a href="#mua-reqs">Section 5</a>); </li>
<li>Mail Submission Agent (<a href="#msa-reqs">Section 6</a>); and, </li>
<li>Mail Transfer Agent (<a href="#mta-reqs">Section 7</a>); </li>
</ul>
<p> </p>
<h1 id="rfc.section.2">
<a href="#rfc.section.2">2.</a> Conventions Used in This Document</h1>
<p id="rfc.section.2.p.1">The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in <a href="#RFC2119">[RFC2119]</a>. </p>
<h1 id="rfc.section.3">
<a href="#rfc.section.3">3.</a> <a href="#Elements-of-Service" id="Elements-of-Service">Elements of Service</a>
</h1>
<h1 id="rfc.section.3.1">
<a href="#rfc.section.3.1">3.1.</a> Introduction</h1>
<p id="rfc.section.3.1.p.1">The military messaging elements of service are adopted from <a href="#ACP123">[ACP123]</a>. </p>
<p id="rfc.section.3.1.p.2">Many of these elements of service are derived from the X.400 standards upon which <a href="#ACP123">[ACP123]</a> is based. </p>
<p id="rfc.section.3.1.p.3">Note that some of the X.400 elements of service do not have an equivalent in a SMTP messaging system. It is not the intention of this profile to define additional SMTP functionality and consequently a number of the military messaging elements of service are not supported by this profile. </p>
<p id="rfc.section.3.1.p.4">Specifically, the physical delivery, conversion (implicit or explicit) and alternate recipient elements of service are not supported by this profile. </p>
<p id="rfc.section.3.1.p.5">This profile adopts, where appropriate, header fields that are defined in <a href="#RFC2156">[RFC2156]</a> to support X.400 elements of service that support military messaging elements of service. <a href="#RFC2156">[RFC2156]</a> has already addressed the issue of conveying many of the X.400 elements of service within an SMTP messaging system. </p>
<h1 id="rfc.section.3.2">
<a href="#rfc.section.3.2">3.2.</a> <a href="#Profile-Support" id="Profile-Support">Profile Support</a>
</h1>
<div id="#rfc.table.1"></div>
<table cellpadding="3" cellspacing="0" class="tt full center">
<thead><tr>
<th class="left">Element of Service</th>
<th class="left">ACP123 Reference</th>
<th class="left">Support</th>
<th class="left">SMTP Standard</th>
<th class="left">Header Field or SMTP Parameter</th>
</tr></thead>
<tbody>
<tr>
<td class="left">
<a href="#Access-Management">Access Management</a> <cite title="NONE">[Access-Management]</cite> </td>
<td class="left">205a </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC4954">[RFC4954]</a>, <a href="#RFC3207">[RFC3207]</a> </td>
<td class="left">N/A </td>
</tr>
<tr>
<td class="left">
<a href="#Content-Type-Indication">Content Type Indication</a> <cite title="NONE">[Content-Type-Indication]</cite> </td>
<td class="left">205b </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC6477">[RFC6477]</a>, 3.2 </td>
<td class="left">MMHS-Extended-Authorization-Info </td>
</tr>
<tr>
<td class="left">
<a href="#Converted-Indication">Converted Indication</a> <cite title="NONE">[Converted-Indication]</cite> </td>
<td class="left">205c </td>
<td class="left">N/A </td>
<td class="left">N/A </td>
<td class="left">N/A </td>
</tr>
<tr>
<td class="left">
<a href="#Delivery-Time-Stamp-Indication">Delivery Time Stamp Indication</a> <cite title="NONE">[Delivery-Time-Stamp-Indication]</cite> </td>
<td class="left">205d </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC5322">[RFC5322]</a>, 3.6.7 </td>
<td class="left">Received </td>
</tr>
<tr>
<td class="left">
<a href="#MM-Identification">MM Identification</a> <cite title="NONE">[MM-Identification]</cite> </td>
<td class="left">205e </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC5322">[RFC5322]</a>, 3.6.4 </td>
<td class="left">Message-ID </td>
</tr>
<tr>
<td class="left">
<a href="#Message-Identification">Message Identification</a> <cite title="NONE">[Message-Identification]</cite> </td>
<td class="left">205f </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC3461">[RFC3461]</a>, 4.4 </td>
<td class="left">ENVID </td>
</tr>
<tr>
<td class="left">
<a href="#Non-Delivery-Notification">Non-delivery Notification</a> <cite title="NONE">[Non-Delivery-Notification]</cite> </td>
<td class="left">205g </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC3461">[RFC3461]</a>, 4.1 </td>
<td class="left">NOTIFY=FAILURE </td>
</tr>
<tr>
<td class="left">
<a href="#Original-Encoded-Information-Types">Original Encoded Information Types</a> <cite title="NONE">[Original-Encoded-Information-Types]</cite> </td>
<td class="left">205h </td>
<td class="left">MAY </td>
<td class="left">
<a href="#RFC2156">[RFC2156]</a>, 2.3.1.1 </td>
<td class="left">Original-Encoded-Information-Types </td>
</tr>
<tr>
<td class="left">
<a href="#Submission-Time-Stamp-Indication">Submission Time Stamp Indication</a> <cite title="NONE">[Submission-Time-Stamp-Indication]</cite> </td>
<td class="left">205i </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC5322">[RFC5322]</a>, 3.6.7 </td>
<td class="left">Received </td>
</tr>
<tr>
<td class="left">
<a href="#Typed-Body">Typed Body</a> <cite title="NONE">[Typed-Body]</cite> </td>
<td class="left">205j </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC2045">[RFC2045]</a>, 5 </td>
<td class="left">Content-Type </td>
</tr>
<tr>
<td class="left">
<a href="#User-UA-Capabilities-Registration">User/UA Capabilities Registration</a> <cite title="NONE">[User-UA-Capabilities-Registration]</cite> </td>
<td class="left">205k </td>
<td class="left">N/A </td>
<td class="left">N/A </td>
<td class="left">N/A </td>
</tr>
<tr>
<td class="left">
<a href="#Alternate-Recipient-Allowed">Alternate Recipient Allowed</a> <cite title="NONE">[Alternate-Recipient-Allowed]</cite> </td>
<td class="left">206a </td>
<td class="left">N/A </td>
<td class="left">N/A </td>
<td class="left">N/A </td>
</tr>
<tr>
<td class="left">
<a href="#Alternate-Recipient-Assignment">Alternate Recipient Assignment</a> <cite title="NONE">[Alternate-Recipient-Assignment]</cite> </td>
<td class="left">206b </td>
<td class="left">N/A </td>
<td class="left">N/A </td>
<td class="left">N/A </td>
</tr>
<tr>
<td class="left">
<a href="#Authorizing-Users-Indication">Authorizing Users Indication</a> <cite title="NONE">[Authorizing-Users-Indication]</cite> </td>
<td class="left">206c </td>
<td class="left">MUST </td>
<td class="left">
<a href="#I-D.melnikov-mmhs-authorizing-users">[I-D.melnikov-mmhs-authorizing-users]</a> </td>
<td class="left">MMHS-Authorizing-Users </td>
</tr>
<tr>
<td class="left">
<a href="#Auto-Forwarded-Indication">Auto-forwarded Indication</a> <cite title="NONE">[Auto-Forwarded-Indication]</cite> </td>
<td class="left">206d </td>
<td class="left">MAY </td>
<td class="left">
<a href="#RFC2156">[RFC2156]</a>, 2.3.1.2 </td>
<td class="left">Autoforwarded </td>
</tr>
<tr>
<td class="left">
<a href="#Blind-Copy-Recipient-Indication">Blind Copy Recipient Indication</a> <cite title="NONE">[Blind-Copy-Recipient-Indication]</cite> </td>
<td class="left">206e </td>
<td class="left">MUST </td>
<td class="left">
<a href="#RFC5322">[RFC5322]</a>, 3.6.3 </td>
<td class="left">Bcc </td>
</tr>
<tr>
<td class="left">
<a href="#Body-Part-Encryption-Indication">Body Part Encryption Indication</a> <cite title="NONE">[Body-Part-Encryption-Indication]</cite> </td>