This app offers several ways to mark an email as read or unread:
1. Tap the Sender Avatar to the left of a message to select it from the Message List.
2. Tap the Envelope icon in the Nav Bar.
1. From within an email, tap the Envelope icon in the Nav Bar.
2. The email will be marked as unread.
1. Slowly swipe the email in your inbox to the right until it is highlighted blue and the Envelope icon appears.
2. Release your finger and it will be marked read/unread.
Note: The email will appear as Read or Unread, depending on whether it has been opened or not.