The Inbox is a messaging tool used to communicate with a course, a group, an individual student, or a group of students. You can use the Inbox to communicate with other people in your course at any time.
When would I use the Inbox?
Use the Inbox to:
Send a message to someone in your course or group
Send a message to yourself (displays in your Sent folder)
Reply to messages from others in your course
Filter conversations by course or type
View and reply to assignment submission comments
You can adjust your notification preferences to receive messages using external channels.