private function Run_Cmd($_cmd, $_args = '')
    {
        if ( $_args != '' )
        {
            if ( $_cmd == '' ) $_cmd = $_args;
            else $_cmd = $_cmd." ".$_args;
            //$_cmd == ''?$_cmd = $_args:$_cmd." ".$_args;
        }

        fputs($this->Smtp_Socket, $_cmd."\r\n");
        return $this->Smtp_Ok();  //return the response code
    }