function RelayHostDelete()
{
    $ou = $_GET["ou"];
    $hostname = $_GET["hostname"];
    $main = new maincf_multi($hostname, $ou);
    $main->DELETE_KEY("relayhost_authentication");
    $main->DELETE_KEY("relayhost");
    $sock = new sockets();
    $sock->getFrameWork("cmd.php?postfix-multi-relayhost={$_GET["hostname"]}");
}