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8bit
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... header field is not present.
The values "8bit", "7bit", and "binary" all mean that NO encoding has
...
... US-ASCII data.
"8bit" means that the lines are short, but there may be
non-ASCII characters (octets with the high-order
bit ...
... bit-width Content-Transfer-Encoding token must be used (e.g., "8bit"
for unencoded 8 bit wide data). If the body contains binary data ...
... NOTE: The distinction between the Content-Transfer-Encoding values
of "binary", "8bit", etc. may seem unimportant, in that all of
them really mean "none" -- that is, there has been no encoding of
...
... Encoding is not permitted to have any value other than a bit width
(e.g., "7bit", "8bit", etc.) or "binary".
It should be noted that email ...
... Content-Types. In particular, it is expressly forbidden to use any
encodings other than "7bit", "8bit", or "binary" with any Content-
Type that recursively includes other Content-Type fields, notably the
...
... Content-Transfer-Encoding field,
no encoding other than "7bit", "8bit", or "binary" is permitted for
entities of type "multipart". The multipart delimiters and header
fields are always represented as 7-bit ...
... Content-Transfer-Encoding field,
no encoding other than "7bit", "8bit", or "binary" is permitted for
messages or parts of type "message". Even stronger restrictions
apply to the subtypes "message/partial" and "message/external-body ...
... transport, the use of a
content-transfer-encoding of "8bit" or "binary" is explicitly
prohibited for entities of type message/partial.
...
... transport, the use of a content-transfer-
encoding of "8bit" or "binary" is explicitly prohibited for entities
of type message/external-body.
...
... Specifically, only "7bit" is permitted for "message/partial" or
"message/external-body", and only "7bit", "8bit", or "binary" are
permitted for other subtypes of "message".
______________________________________________________________
...
... body" are now required to use only the "7bit" transfer-encoding.
(Specifically, "binary" and "8bit" are not permitted.)
11. The "application/oda" content-type ...
... Klensin, J., (WG Chair), Freed, N., (Editor), Rose, M., Stefferud, E., and D. Crocker, "SMTP Service Extension for 8bit-MIME transport", RFC 1426(-> 1652draft) ...