RFC 1138 Mapping X.400(88) and 822 December 1989 1.10 Acknowledgements ..................................... 10 2. Service Elements ....................................... 10 2.1 The Notion of Service Across a Gateway ................ 10 2.2 RFC 822 ............................................... 11 2.3 X.400 ................................................. 15 3. Basic Mappings ........................................ 24 3.1 Notation .............................................. 24 3.2 ASCII and IA5 ......................................... 25 3.3 Standard Types ........................................ 25 3.4 Encoding ASCII in Printable String .................... 28 4. Addressing ............................................. 29 4.1 A textual representation of MTS.ORAddress ............. 30 4.2 Basic Representation .................................. 30 4.3 EBNF.822-address MTS.ORAddress .................... 34 4.4 Repeated Mappings ..................................... 43 4.5 Directory Names ....................................... 45 4.6 MTS Mappings .......................................... 45 4.7 IPMS Mappings ....... ................................. 48 5. Detailed Mappings ...................................... 52 5.1 RFC 822 -> X.400 ...................................... 52 5.2 Return of Contents .................................... 59 5.3 X.400 -> RFC 822 ...................................... 60 Appendix A Differences with RFC 987 ....................... 78 1. Introduction ........................................... 78 2. Service Elements ....................................... 78 3. Basic Mappings ......................................... 78 4. Addressing ............................................. 78 5. Detailed Mappings ...................................... 79 6. Appendices ............................................. 79 Appendix B Mappings specific to the JNT Mail .............. 79 1. Introduction ........................................... 79 2. Domain Ordering ........................................ 79 3. Acknowledge-To: ........................................ 79 4. Trace .................................................. 80 5. Timezone specification ................................. 80 6. Lack of 822-MTS originator specification ............... 80 Appendix C Mappings specific to UUCP Mail ................. 81 Appendix D Object Identifier Assignment ................... 82 Appendix E BNF Summary .................................... 82 Appendix F Format of address mapping tables ............... 89 References ................................................. 91 Chapter 1 -- Overview 1.1. X.400 This document relates to the CCITT 1988 X.400 Series Recommendations / ISO IEC 10021 on the Message Oriented Text Interchange Service Kille