Variable: message-mailer-swallows-blank-line

message-mailer-swallows-blank-line is a customizable variable defined in message.el.gz.

Value

nil

Documentation

Set this non-nil if the system's mailer runs the header and body together.

(This problem exists on Sunos 4 when sendmail is run in remote mode.)
The value should be an expression to test whether the problem will actually occur.

Source Code

;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
;; Note: could use /usr/ucb/mail instead of sendmail;
;; options -t, and -v if not interactive.
(defcustom message-mailer-swallows-blank-line
  (if (and (string-match "sparc-sun-sunos\\(\\'\\|[^5]\\)"
			 system-configuration)
	   (file-readable-p "/etc/sendmail.cf")
	   (with-temp-buffer
             (insert-file-contents "/etc/sendmail.cf")
             (goto-char (point-min))
             (let ((case-fold-search nil))
               (re-search-forward "^OR\\>" nil t))))
      ;; According to RFC 822 and its successors, the field name must
      ;; consist of printable US-ASCII characters other than colon,
      ;; i.e., decimal 33-56 and 59-126.
      '(looking-at "[ \t]\\|[][!\"#$%&'()*+,./0-9;<=>?@A-Z\\^_`a-z{|}~-]+:"))
  "Set this non-nil if the system's mailer runs the header and body together.
\(This problem exists on Sunos 4 when sendmail is run in remote mode.)
The value should be an expression to test whether the problem will
actually occur."
  :group 'message-sending
  :link '(custom-manual "(message)Mail Variables")
  :risky t
  :type 'sexp)