Double-click on the email you received to view the details:
Click on the button. This will automatically address the email to the person that sent the email.
Type in the appropriate response. You will notice that the text of the email received is automatically included in the Reply.
Click ‘OK’ to send the reply and click Close to close the window.
If no further action is required, click on the 'actioned' checkbox in the Inbox next to this email to indicate that no further action is required with regard to this email:
To view the email that have been received and actioned, click on the ‘Show Actioned Items’ checkbox at the bottom of the window: