If you have received a private message or an announcement, you will see a notification on the envelope icon in the mobile application.
To see your messages within the app, simply select the envelope icon on the bottom navigation.
You have four options:
Inbox: In your Inbox you can see all messages that you have received, and mark them as unread, or delete them.
Sent: Your Sent folder shows all messages you have sent, and gives you the option to delete them.
Trash: The Trash folder shows all deleted messages. You can recover deleted messages.
Away message: Allows you to set up an automated response for when you are out-of-office.
Note that deleting messages only deletes them on your side. The sender or recipient can still see this message.
Check also: Sending Personal Messages [mobile app]