For example, if your notification class supports sending notifications through e-mail and to cellular phones using Short Message Service (SMS), you would configure two delivery protocols: SMTP and SMS.

• 例如,如果通知类支持通过电子邮件发送通知,以及使用短信服务(SMS)来向移动电话发送通知,则应配置以下两种传递协议:SMTP和SMS。