How to view read receipts for messages
To see if a message was read, visit the message under your Sent folder. It should say "Read: Time and Date" in green.
Additionally, when a DocbookMD message is sent, you have the option of placing a priority, and they are as follows -
1. No priority - This type of message is not urgent, by default it will not emit an audio notification (unless changed under Settings), and will not notify the sender if it was read.
2. 30 minutes priority - This type of message is somewhat urgent and will notify the sender if the message is not read within 30 minutes.
3. 5 minute priority - This message is very important and will notify the sender if the recipient has not read the message within 5 minutes.
You can change your audio notifications for all priorities under Settings.
The message sender will not receive a read receipt, but they will be notified if the message is not read.