#!/bin/sh
#
# prevent-draft – prevent sending a message while an X-Draft header exists
#
# Copyright © 2010 martin f. krafft <madduck@madduck.net>
# Released under the terms of the Artistic Licence 2.0
#
set -eu

if grep -iq '^X-Draft:' $1; then
  echo >&2 "E: will not send this message while the X-Draft header is present"
  exit 1
fi