How do I know if the other party has received the text message?

If the SMS has a delivery report, as long as it is turned on, the system will automatically send the receipt information regardless of whether the SMS is sent successfully or not. If the sent information reaches the other party's mobile phone, you will see the report of successful sending. If it doesn't arrive (stop, etc. ), there will be no delivery report, and after a certain time limit, it will show that sending failed.

Extended data:

The short message receipt service refers to the service that the customer receives the receipt short message immediately after sending the point-to-point short message with the mobile phone (including status information and additional information on whether the receiver successfully received it). Specifically, after the user sends a short message, the system sends a receipt to the user in time to prompt whether the short message was sent successfully.

The length of additional information is limited to 44 characters (including punctuation marks), and the content involves cultural entertainment, life health, practical common sense, hot events and other fields. Customers can personalize the information content and receiving method of receipt SMS.

References:

Baidu encyclopedia-SMS receipt