You can enable a reminder for an E-Mail. This function creates a task and reminds you of the due date.
How to activate the E-Mail reminder:
Select an E-Mail.
Click the More icon in the toolbar. Select Reminder from the menu.
You can also use the Actions icon in the detail view.
Complete the details in the Remind me window. Select a time from the Remind me drop-down field. Click on Create reminder.