RFC 3459 (rfc3459) - Page 2 of 24

Critical Content Multi-purpose Internet Mail Extensions (MIME) Parameter

RFC 3459           Critical Content of Internet Mail        January 2003


Table of Contents

   1.  Conventions used in this document..............................3
   2.  Introduction...................................................3
   3.  Handling Parameter.............................................4
       3.1. REQUIRED..................................................4
       3.2. OPTIONAL..................................................5
       3.3. Default Values............................................5
       3.4. Other Values..............................................5
   4.  Collected Syntax...............................................6
   5.  Notification...................................................6
       5.1. DSN vs. MDN Generation....................................7
       5.2. Summary...................................................7
   6.  Signed Content.................................................8
   7.  Encrypted Content..............................................9
   8.  Status Code...................................................10
   9.  Requirements for Critical Content.............................11
       9.1. Needs....................................................11
       9.2. Current Approaches.......................................12
   10. The Content Gateway...........................................13
       10.1. Integrated Content Gateway..............................14
       10.2. Disaggregated Delivery Network..........................14
   11. Backward Compatibility Considerations.........................15
   12. MIME Interactions.............................................15
       12.1. multipart/alternative...................................15
       12.2. multipart/related.......................................15
       12.3. message/rfc822..........................................15
       12.4. multipart/signed........................................16
       12.5. multipart/encrypted.....................................16
   13. Implementation Examples.......................................16
       13.1. Content Gateways........................................16
       13.2. Disaggregated Content Gateway...........................17
   14. OPES Considerations...........................................18
       14.1. Consideration (2.1): One-Party Consent..................18
       14.2. Consideration (2.2): IP-layer Communications............18
       14.3. Consideration (3.1): Notification - Sender..............18
       14.4. Consideration (3.2): Notification - Receiver............18
       14.5. Consideration (3.3): Non-Blocking.......................18
       14.6. Consideration (4.1): URI Resolution.....................18
       14.7. Consideration (4.2): Reference Validity.................19
       14.8. Consideration (4.3): Architecture Extensions............19
       14.9. Consideration (5.1): Privacy............................19
   15. Security Considerations.......................................19
   16. IANA Considerations...........................................19
   17. References....................................................20
       17.1 Normative References.....................................20
       17.2 Informative Reference....................................21
   18. Acknowledgments...............................................22



Burger                      Standards Track