To change your email notification settings, navigate to the "Account" tab of your Dashboard. Then, under "My Stuff" on the left side of the page, click "Notification Settings."
From the "Notification Settings" tab, you can unsubscribe from any email notifications. To unsubscribe, simply uncheck the "Active" boxes to the right of the "Email Type" that you do not want to receive notifications from, or click "Unsubscribe from All" to end all email notifications.
Remeber to select "Save Changes" after you have made all of your adjustments.