FeedbackExpress regularly pulls in your Amazon open listings.
Depending on your Amazon notification settings, they might email you each time one of these reports is generated.
You can easily turn these notifications off via your Amazon seller account following these steps:
- Login to your Amazon Seller Central Account.
- Click 'Settings' on the top right.
- Click 'Notification Preferences'.
- Under 'Reports', find 'Opening Listings Report', untick the box and save.