Good Afternoon @JohnT2!
Thank you for your post. Once a message is sent an email notification should be sent to the user if they are offline and show a notification on their end. The features for messaging can be found in this article https://docs.powerschool.com/UCHT/communication/messages. While there is not a specific feature to show an end user when their messages have been received and/or read by the other party, we appreciate you sharing your feedback with us. We will be happy to share that with our Product Team on your behalf!
PowerSchool Community Admin