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+;;; messcompat.el --- making message mode compatible with mail mode
+
+;; Copyright (C) 1996-2017 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; Keywords: mail, news
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This file tries to provide backward compatibility with sendmail.el
+;; for Message mode.  It should be used by simply adding
+;;
+;; (require 'messcompat)
+;;
+;; to the .emacs file.  Loading it after Message mode has been
+;; loaded will have no effect.
+
+;;; Code:
+
+(require 'sendmail)
+
+(defvar message-from-style mail-from-style
+  "*Specifies how \"From\" headers look.
+
+If nil, they contain just the return address like:
+	king@grassland.com
+If `parens', they look like:
+	king@grassland.com (Elvis Parsley)
+If `angles', they look like:
+	Elvis Parsley <king@grassland.com>
+
+Otherwise, most addresses look like `angles', but they look like
+`parens' if `angles' would need quoting and `parens' would not.")
+
+(defvar message-interactive mail-interactive
+  "Non-nil means when sending a message wait for and display errors.
+nil means let mailer mail back a message to report errors.")
+
+(defvar message-setup-hook mail-setup-hook
+  "Normal hook, run each time a new outgoing message is initialized.
+The function `message-setup' runs this hook.")
+
+(if (boundp 'mail-mode-hook)
+    (defvar message-mode-hook mail-mode-hook
+      "Hook run in message mode buffers."))
+
+(defvar message-indentation-spaces mail-indentation-spaces
+  "*Number of spaces to insert at the beginning of each cited line.
+Used by `message-yank-original' via `message-yank-cite'.")
+
+(defvar message-signature mail-signature
+  "*String to be inserted at the end of the message buffer.
+If t, the `message-signature-file' file will be inserted instead.
+If a function, the result from the function will be used instead.
+If a form, the result from the form will be used instead.")
+
+;; Deleted the autoload cookie because this crashes in loaddefs.el.
+(defvar message-signature-file mail-signature-file
+  "*File containing the text inserted at end of the message buffer.")
+
+(defvar message-default-headers mail-default-headers
+  "*A string containing header lines to be inserted in outgoing messages.
+It is inserted before you edit the message, so you can edit or delete
+these lines.")
+
+(defvar message-send-hook mail-send-hook
+  "Hook run before sending messages.")
+
+(defvar message-send-mail-function send-mail-function
+  "Function to call to send the current buffer as mail.
+The headers should be delimited by a line whose contents match the
+variable `mail-header-separator'.")
+
+(provide 'messcompat)
+
+;;; messcompat.el ends here