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Message Transmission Protocol :: RFC0680

Network Working Group                                            T. Myer
Request for Comment: 680                                    D. Henderson
NIC: 32116                                                     BBN-TENEX
                                                          April 30, 1975

                     Message Transmission Protocol

                            Theodore H. Myer

                          D. Austin Henderson


   This document defines a number of message fields beyond those
   discussed in RFC 561.  The overall message format is compatible with
   RFC 561; it makes extensive use of the miscellaneous fileds defined
   within RFC 561.  The purpose of this document is to establish ARPANET
   standards with regard to the syntax and semantics for these
   additional fields.  It is fully expected that all fields discussed
   herein will not be automatically processed by all Message Servers;
   however, the standard is necessary so that sites which wish to make
   use of these fields have a standard to work with.

   This document attempts to tread the narrow line between features for
   human processing and features for machine processing.  The general
   feeling is that the fields listed are useful to people even if
   automatic processing is not supplied.  In most cases, machine-
   readable notations have been enclosed in angle brackets (<>) to allow
   easy non-ambiguous ways for automatic processes to know whether and
   where to look in any field.  The entire specifications has been made
   excessively general to allow for experimentation. Future documents
   based on experience will try to be more specific.  This is simply the
   next step following .

   This document is contained in two sections.  Section I contains the
   relevant parts of RFC 561 which define the basic message syntax.
   Section II lists the new (and existing) header fields together with
   their proposed uses.

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RFC 680


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