# procmail spamfilter using whitelist (2006 Yargo Bonetti)
  # :: use at your own risk and any way you want! ::
  # whitelist: file containing one valid e-mail address per line
  # (only generic xxx@yyy.zz form, without "Name.." <*> parts)
  WHITELIST=$MAILDIR/.whitelist
  # spamfilter
  FROM=`formail -c -x 'From:'|sed -e 's/.*<\(.*@[^>]*\)>.*/\1/'`
  :0 hb:
  * ! ? grep -i -F -e "$FROM" $WHITELIST >/dev/null
  $MAILDIR/quarantine