s-o-1036 June 1994
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6. Optional Headers
Many MAIL headers, and many of those specified in present
and future MAIL extensions, are potentially applicable to
news. Headers specific to MAIL's point-to-point transmis-
sion paradigm, e.g. To and Cc, SHOULD not appear in news
articles. (Gateways wishing to preserve such information
INTERNET DRAFT to be NEWS sec. 6
for debugging probably SHOULD hide it under different names;
prefixing "X-" to the original headers, resulting in e.g.
"X-To", is suggested.)
The following optional headers are either specific to news
or of particular note in news articles; an article MAY con-
tain some or all of them. (Note that there are some circum-
stances in which some of them are mandatory; these are
explained under the individual headers.) An article MUST
not contain two or more headers with any one of these header
names.
NOTE: The ban on duplicate header names does not
apply to headers not specified in this Draft at
all, such as "X-" headers. Software should not
assume that all header names in a given article
are unique.
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#Diff to first older
--- ../rfc1036/Optional_Headers.out December 1987
+++ ../s-o-1036/Optional_Headers.out June 1994
@@ -1,2 +1,29 @@
-2.2. Optional Headers
+6. Optional Headers
+
+Many MAIL headers, and many of those specified in present
+and future MAIL extensions, are potentially applicable to
+news. Headers specific to MAIL's point-to-point transmis-
+sion paradigm, e.g. To and Cc, SHOULD not appear in news
+articles. (Gateways wishing to preserve such information
+
+INTERNET DRAFT to be NEWS sec. 6
+
+
+for debugging probably SHOULD hide it under different names;
+prefixing "X-" to the original headers, resulting in e.g.
+"X-To", is suggested.)
+
+The following optional headers are either specific to news
+or of particular note in news articles; an article MAY con-
+tain some or all of them. (Note that there are some circum-
+stances in which some of them are mandatory; these are
+explained under the individual headers.) An article MUST
+not contain two or more headers with any one of these header
+names.
+
+ NOTE: The ban on duplicate header names does not
+ apply to headers not specified in this Draft at
+ all, such as "X-" headers. Software should not
+ assume that all header names in a given article
+ are unique.