Ralph wrote:
> Does the 76 historically come from 78 - strlen("> ") to allow for a
> simple single-level of quoting?
It's the encoded length, though of course "> " would encode
without change. This is all I could find in a quick grep of the
RFCs, in Appendix B of RFC 1521:
The following guidelines may be useful to anyone devising a data
format (Content-Type) that will survive the widest range of
networking technologies and known broken MTAs unscathed.
[...]
(4) Lines longer than 76 characters may be wrapped or
truncated in some environments.
David
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