text/html; unshare -n -r w3m -I %{charset} -T text/html; copiousoutput;
image/*; mutt_bgrun /usr/bin/feh --action1 ";dragon -x '\%F'" -. %s; test=test -n "$DISPLAY"
application/pdf; mutt_bgrun /usr/bin/zathura %s; test=test -n "$DISPLAY"