function _Logger($str) {
    $str = (string) $str; // casting for luck
    if(strlen($str) > 0) {
	$str = "\nLog @ ". strftime('%c')."\n".$str."\n";
	$logdir = '/path/to/_tmp_log/';
	if(!is_dir($logdir)) {
	    mkdir($logdir);
	}
	$logfile = $logdir.'fudmaildump.txt';
	$fh = fopen($logfile, 'a');
	fwrite($fh, $str); fclose($fh);
    }
}