Variable: rfc2047-encode-max-chars
rfc2047-encode-max-chars is a variable defined in rfc2047.el.gz.
Value
76
Documentation
Maximum characters of each header line that contain encoded-words.
According to RFC 2047, it is 76. If it is nil, encoded-words will not be folded. Too small value may cause an error. You should not change this value.
Source Code
;; Defined in /usr/src/emacs/lisp/mail/rfc2047.el.gz
;; From RFC 2047:
;; 2. Syntax of encoded-words
;; [...]
;; While there is no limit to the length of a multiple-line header
;; field, each line of a header field that contains one or more
;; 'encoded-word's is limited to 76 characters.
;;
;; In `rfc2047-encode-parameter' it is bound to nil, so don't defconst it.
(defvar rfc2047-encode-max-chars 76
"Maximum characters of each header line that contain encoded-words.
According to RFC 2047, it is 76. If it is nil, encoded-words
will not be folded. Too small value may cause an error. You
should not change this value.")