File: rfc1153.txt

package info (click to toggle)
doc-rfc 20181229-2
  • links: PTS, VCS
  • area: non-free
  • in suites: buster
  • size: 570,944 kB
  • sloc: xml: 285,646; sh: 107; python: 90; perl: 42; makefile: 14
file content (227 lines) | stat: -rw-r--r-- 6,406 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227






Network Working Group                                          F. Wancho
Request for Comments: 1153                                          WSMR
                                                              April 1990


                         Digest Message Format

Status of this Memo

   This memo describes the de facto standard Digest Message Format.
   This is an elective experimental protocol.  Distribution of this memo
   is unlimited.

Background

   High traffic volume large mailing lists began to appear on the net in
   the mid-70s.  The moderators of those lists developed a digest
   message format to enclose several messages into one composite message
   for redistribution to the mailing list addressees.  This format
   reduces the mailer load in proportion to the number of messages
   contained within a digest message, and conserves network bandwidth by
   reducing the size of the headers of the enclosed messages.

   This RFC documents the digest message format so that others may
   follow this format in creating (digestifying) and separating
   (undigestifying) digest messages to maintain compatibility with the
   programs expecting this de facto standard.  Any editorial functions
   performed at the discretion of a digest moderator, such as discarding
   submissions, editing content to correct spelling and punctuation
   errors, inserting comments, and reformatting paragraphs to conform to
   width conventions are beyond the scope of this memo.

   This memo describes the de facto standard Digest Message Format.  It
   is not meant to supersede nor replace the generic message
   encapsulation format described in RFC 934.  It merely documents a
   particular message encapsulation format that existed well before RFC
   934 was published and continues to be the format of choice for digest
   messages.

Description

   A digest message is a conventional message consisting of a header and
   body conforming to RFC 822 as clarified in RFC 1123.  There is no
   fixed size.  Limitations may exist in intermediate mail gateways
   which restrict the size.  The typical digest size is 15,000
   characters.

   The header of a digest message should identify the digest in the



Wancho                                                          [Page 1]

RFC 1153                 Digest Message Format                April 1990


   Subject line by listname, the key word, Digest, the volume number
   (usually a sequential number either starting at 1 or the last two
   digits of the year and incremented by one starting with the first
   issue of the next calendar year), and an issue number starting at one
   for the first issue of a new calendar year.

   The body of a digest message must consist of a Preamble, one or more
   enclosed messages, and a Trailer.

   The Preamble usually contains a table of contents consisting of the
   subject line contents of the enclosed messages, usually indented or
   centered, and also may contain brief administrative or other
   announcements.

   The Preamble must be separated from the remainder of the message by a
   line of 70 hyphens followed by a blank line.

   Each enclosed message is a conventional message consisting of a
   header and body, separated by a blank line.  If they exist in the
   original message header, the following lines must be retained as-is
   in the reconstructed header: Date:, From:, To:, Cc:, Subject:,
   Message-ID:, and Keywords:, rearranged to appear in that order.
   Retaining the Summary: line is optional.  Lines include continuation
   lines as defined in the RFCs.  All other header lines should be
   discarded, especially Received lines.  All leading and trailing blank
   lines should be removed from the message body.  The message body may
   be scanned to replace with a blank the first character of any lines
   of exactly and only 30 hyphens.

   Each enclosed message must be separated from the the remainder of the
   digest message by a blank line before and after a line of 30 hyphens.

   The Trailer immediately follows the blank line of message separator
   following the last enclosed message.  The Trailer consists of two
   lines.  The first line must begin with the words, End of, followed by
   the listname a blank and the word Digest which is usually followed by
   volume and issue number on the same line.  The second and last line
   of the Trailer and the entire message is a line of asterisks serving
   to underline the line immediately above it.

Example

   The following example serves as a template for a digest message
   conforming to this memo.  It contains a header, and a body consisting
   of a Preamble, two enclosed messages, and a Trailer.  fqhn means
   Fully Qualified Host Name.  The Date: lines are examples only.





Wancho                                                          [Page 2]

RFC 1153                 Digest Message Format                April 1990


Date: ddd, dd mmm yy hh:mm:ss zzz
From: listname-REQUEST@fqhn
Reply-To: listname@fqhn
Subject: listname Digest Vyy #nn
To: listname@fqhn

listname Digest             ddd, dd mmm yy       Volume yy : Issue   nn

Today's Topics:
                          Message One Subject
                          Message Two Subject

Administrivia:

Messages from the list moderator or maintainer go here.

----------------------------------------------------------------------

Date: ddd, dd mmm yy hh:mm:ss zzz
From: Joe User <username@fqhn>
Subject: Message One Subject

This is the message body of the first message.

Joe

------------------------------

Date: ddd, dd mmm yy hh:mm:ss zzz
From: Jane User <username@fqhn>
Subject: Message Two Subject

This is the body of message two.

Jane

------------------------------

End of listname Digest Vyy Issue #nn
************************************











Wancho                                                          [Page 3]

RFC 1153                 Digest Message Format                April 1990


Security Considerations

   Security issues are not discussed in this memo.

Author's Address

   Frank J. Wancho
   USAISC-White Sands
   ASQNC-TWS-SS-C (F. Wancho, Building 1512)
   White Sands Missile Range, NM 88002-5506

   Phone: (505) 678-3009

   Email: WANCHO@WSMR-SIMTEL20.ARMY.MIL





































Wancho                                                          [Page 4]