R. David Murray <[email protected]> added the comment:
>From RFC 2047:
(3) As a replacement for a 'word' entity within a 'phrase', for example,
one that precedes an address in a From, To, or Cc header. The ABNF
definition for 'phrase' from RFC 822 thus becomes:
phrase = 1*( encoded-word / word )
In this case the set of characters that may be used in a "Q"-encoded
'encoded-word' is restricted to: <upper and lower case ASCII
letters, decimal digits, "!", "*", "+", "-", "/", "=", and "_"
(underscore, ASCII 95.)>. An 'encoded-word' that appears within a
'phrase' MUST be separated from any adjacent 'word', 'text' or
'special' by 'linear-white-space'.
The reason for this is that things like '@' are syntactically significant in
headers and so must be encoded.
----------
nosy: +r.david.murray
resolution: -> not a bug
stage: -> resolved
status: open -> closed
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