You can turn off these notification emails by following the steps below.
1.) Login to Member Zone
2.) Under 'Email', click 'Manage Spam & Virus Protection'
3.) Click 'Preferences'
4.) Click 'Notifications' (right under 'Manage User Account')
5.) Select 'Never'
6.) Press 'Submit Changes'
This should stop all notifications from being sent. You can change this back to Weekly or Daily whenever you wish.