public function send()
    {
        if (empty($this->mailer->Subject) || empty($this->mailer->Body)) {
            throw new Exception("Mail subject() and body() can not be empty in order to send mail.");
        }
        if (!$this->getMailer()->send()) {
            Yii::error($this->getError(), __METHOD__);
            return false;
        }
        return true;
    }