Restore the last unsent message

If you accidentally exit the compose box while you are composing a message, you can restore your previous unsent message.

Open the compose box by composing a new message or reply.
Click the Restore draft link that appears between the A () and eye () icons in the bottom left corner of the compose box.
After clicking the Restore draft link, the compose box will be transformed to include the contents of your previous unsent message.