RFC 3464 Delivery Status Notifications January 2003 Table of Contents 1. Introduction ....................................................3 1.1 Purposes .....................................................3 1.2 Requirements .................................................4 1.3 Terminology ..................................................5 2. Format of a Delivery Status Notification ........................7 2.1 The message/delivery-status content-type .....................9 2.1.1 General conventions for DSN fields ........................9 2.1.2 "*-type" sub-fields .......................................9 2.1.3 Lexical tokens imported from RFC 822 .....................10 2.2 Per-Message DSN Fields ......................................11 2.2.1 The Original-Envelope-Id field ...........................11 2.2.2 The Reporting-MTA DSN field ..............................12 2.2.3 The DSN-Gateway field ....................................13 2.2.4 The Received-From-MTA DSN field ..........................14 2.2.5 The Arrival-Date DSN field ...............................14 2.3 Per-Recipient DSN fields ....................................14 2.3.1 Original-Recipient field .................................15 2.3.2 Final-Recipient field ....................................15 2.3.3 Action field .............................................16 2.3.4 Status field .............................................18 2.3.5 Remote-MTA field .........................................19 2.3.6 Diagnostic-Code field ....................................19 2.3.7 Last-Attempt-Date field ..................................20 2.3.8 final-log-id field .......................................20 2.3.9 Will-Retry-Until field ...................................20 2.4 Extension fields ............................................21 3. Conformance and Usage Requirements .............................22 4. Security Considerations ........................................23 4.1 Forgery .....................................................23 4.2 Confidentiality .............................................23 4.3 Non-Repudiation .............................................25 5. References .....................................................25 6. Acknowledgments ................................................26 Appendix A - Collected Grammar ....................................27 Appendix B - Guidelines for Gatewaying DSNS .......................29 Gatewaying from other mail systems to DSNs ......................29 Gatewaying from DSNs to other mail systems ......................30 Appendix C - Guidelines for Use of DSNS By Mailing List Exploders .30 Appendix D - IANA Registration Forms for DSN Types ................31 IANA registration form for address-type .........................32 IANA registration form for diagnostic-type ......................32 IANA registration form for MTA-name-type ........................32 Appendix E - Examples .............................................33 Simple DSN ......................................................34 Multi-Recipient DSN .............................................35 DSN from gateway to foreign system ..............................36 Moore & Vaudreuil Standards Track