What personalized receiving modes can users set in the SMS receipt service?

Users can choose three personalized receiving modes according to their own short messages, namely: 1) full open mode (each short message will receive a receipt message). 2) Reminder mode (only when the message is not delivered in time will the receipt message be received, which is suitable for users with a large amount of messages). 3) Specify the mode (you will receive the receipt only if you send a short message to a specific mobile phone number). For more service offers, click on "official website" Customer Service 4 below to answer your questions.