We are using Amazon Cloud service to send email notifications.  This service requires that your request to receive such notifications is confirmed.  Look for an email with the subject "AWS Notification - Subscription Confirmation", open it and click on the link provided to confirm your subscription. It is a one-time action that is required for every new email address added.

If you cannot find this email, look in your Spam and Trash folders.   You can always remove and then add an email address, a subscription confirmation request will be sent again.

Note that this is a free service provided by MySpool to owners of our devices.