private function log($message, $party = null, $exception = false) {
		if (!$this->config->getDebugMode()) return;
		
		if (!$party) {
			$party = $message instanceof SmtpResponse ? 'server' : 'client';
		}
		// @todo: add logger possibility
		$eol = self::EOL;
		echo "SMTP " . strtoupper($party) . ":{$eol}{$message}{$eol}";
		
	}