There are 2 reasons you will receive emails from an Event Temple task:
A Task has been assigned to you
A Task that's assigned to you has Reminders set
To set Reminders on a Task follow these steps:
Edit an existing Task or create a new Task
If creating a new Task, enter all of the required information before adding your Reminder
Click Add Reminder at the bottom of the Edit Task window
Set the Reminder day/time (X amount of minutes, hours, days, weeks before the due date)
Click Save