Internet Message Protocol
RFC 759
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(August 1980; No errata)
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2013-03-02
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IEN: 113
RFC: 759
INTERNET MESSAGE PROTOCOL
Jonathan B. Postel
August 1980
Information Sciences Institute
University of Southern California
4676 Admiralty Way
Marina del Rey, California 90291
(213) 822-1511
August 1980
Internet Message Protocol
TABLE OF CONTENTS
PREFACE ........................................................ iii
1. INTRODUCTION ..................................................... 1
1.1. Motivation ................................................... 1
1.2. Scope ........................................................ 1
1.3. The Internetwork Environment ................................. 2
1.4. Model of Operation ........................................... 2
1.5. Interfaces ................................................... 4
2. FUNCTIONAL DESCRIPTION ........................................... 5
2.1. Terminology .................................................. 5
2.2. Assumptions ................................................. 5
2.3. General Specification ........................................ 6
2.4. Mechanisms ................................................... 7
2.5. Relation to Other Protocols ................................. 10
3. DETAILED SPECIFICATION .......................................... 13
3.1. Overview of Message Structure ............................... 13
3.2. Message Structure ........................................... 14
3.3. Identification .............................................. 15
3.4. Command ..................................................... 15
3.5. Document .................................................... 19
3.6. Message Objects ............................................. 20
3.7. Data Elements ............................................... 27
4. OTHER ISSUES .................................................... 35
4.1. Accounting and Billing ...................................... 35
4.2. Addressing and Routing ...................................... 36
4.3. Encryption .................................................. 37
5. The MPM: A Possible Architecture ............................... 39
5.1. Interfaces .................................................. 39
5.2. MPM Organization ............................................ 40
6. EXAMPLES & SCENARIOS ............................................ 45
Example 1: Message Format ........................................ 45
Example 2: Delivery and Acknowledgment ........................... 47
Postel [Page i]
August 1980
Internet Message Protocol
Table Of Contents
7. SPECIFICATION SUMMARY ........................................... 55
7.1. Message Fields .............................................. 55
7.2. Deliver Message ............................................. 58
7.3. Acknowledge Message ......................................... 59
7.4. Probe Message ............................................... 61
7.5. Response Message ............................................ 62
7.6. Cancel Message .............................................. 64
7.7. Canceled Message ............................................ 66
7.8. Data Element Summary ........................................ 68
REFERENCES .......................................................... 69
[Page ii] Postel
August 1980
Internet Message Protocol
PREFACE
This is the second edition of this specification and should be treated
as a request for comments, advice, and suggestions. A great deal of
prior work has been done on computer aided message systems and some of
this is listed in the reference section. This specification was shaped
by many discussions with members of the ARPA research community, and
others interested in the development of computer aided message systems.
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