http://mail.gnu.org/archive/html/phpgroupware-users/2002-02/msg00071.html
is an example of an archived message generated by MHonArc that has a
reply-to button that fills out appropriate headers including message-id. I
see at least three message headers are passed.
If mail.gnu.org has it, I don't imagine it would be too hard for Debian to
have this feature too. It looks like it may be an option in MHonArc.
Drew Daniels