public function sendConfirmation()
    {
        $subject = _t(
            'SilverShop\ShopEmail.ConfirmationSubject',
            'Order #{OrderNo} confirmation',
            '',
            array('OrderNo' => $this->order->Reference)
        );
        return $this->sendEmail(
            'SilverShop/Model/Order_ConfirmationEmail',
            $subject,
            self::config()->bcc_confirmation_to_admin
        );
    }