Send an imessage to each other. How do you know if he received it?

When "delivered" is displayed at the back of the short message, it means that it has been received, but the other party's mobile phone needs to turn on the "send read receipt" function. If it is not opened, even if it is delivered, there is no prompt.

Taking the iPhone8 mobile phone as an example, there are the following steps to turn on the "Send Read Receipt" function:

First, open "Settings" on the phone desktop.

Second, open the "Settings", find the "Information" column, and click Enter.

3. Finally, click the button on the right side of "Send Read Receipt" in the "Information" page to open this function and complete the operation.