Variable: message-syntax-checks
message-syntax-checks is a customizable variable defined in
message.el.gz.
Value
((sender . disabled))
Documentation
Controls what syntax checks should not be performed on outgoing posts.
To disable checking of long signatures, for instance, add
(signature . disabled) to this list.
Don't touch this variable unless you really know what you're doing.
See the Message manual for the meanings of the valid syntax check types.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
(defcustom message-syntax-checks
(if message-insert-canlock '((sender . disabled)) nil)
"Controls what syntax checks should not be performed on outgoing posts.
To disable checking of long signatures, for instance, add
`(signature . disabled)' to this list.
Don't touch this variable unless you really know what you're doing.
See the Message manual for the meanings of the valid syntax check
types."
:group 'message-headers
:link '(custom-manual "(message)Message Headers")
:type '(alist
:key-type symbol
:value-type (const disabled)
:options (approved bogus-recipient continuation-headers
control-chars empty existing-newsgroups from illegible-text
invisible-text long-header-lines long-lines message-id
multiple-headers new-text newgroups quoting-style
repeated-newsgroups reply-to sender sendsys shoot
shorten-followup-to signature size subject subject-cmsg
valid-newsgroups)))