(the return value will be used), a variable (its value will be used)
or a list (it will be @code{eval}ed and the return value will be
used). The functions and sexps are called/@code{eval}ed in the
-message buffer that is being set up. The headers of the current
-article are available through the @code{message-reply-headers}
-variable, which is a @code{mail-header} object that can be accessed
-via the @code{mail-header-*} accessors.
+message buffer that is being set up.
In the case of a string value, if the @code{match} is a regular
expression, or if it takes the form @code{(header @var{match}
Replacing the Text that Matched, elisp, The Emacs Lisp Reference
Manual}.)
-@vindex message-reply-headers
-
If you wish to check whether the message you are about to compose is
meant to be a news article or a mail message, you can check the values
of the @code{message-news-p} and @code{message-mail-p} functions.