public function sendNotification()
    {
        if (($from = self::config()->get('mail_sender')) && empty($from)) {
            $from = Config::inst()->get('Email', 'admin_email');
        }

        if (($to = self::config()->get('mail_receiver')) && empty($to)) {
            $to = Config::inst()->get('Email', 'admin_email');
        }

        $email = new Email();
        $email->setSubject(_t(
            'NotificationMail.TITLE',
            'Nieuwe reservering voor {event}',
            null, array('event' => $this->Event()->Title)
        ));

        $email->setFrom($from);
        $email->setTo($to);
        $email->setTemplate('NotificationMail');
        $email->populateTemplate($this);
        $this->extend('updateNotificationMail', $email);
        return $email->send();
    }