新加邮件发送rpc

     * @return bool

     */

    public function send(array $receiveUserId, $application, $templateId = 0, $sendUserId = 0, $replace = [], $content = ''): bool;

    /**

     * description:发送邮件

     * author: fuyunnan

     * @param array $userList ['111@qq.com','222@qq.com']

     * @param string $subject 邮件标题

     * @param string $body 邮件内容

     * @return bool

     * @throws

     * Date: 2020/9/10

     */

    public function sendMail($userList, $subject, $body): bool;

}