What is the name of the optional, free daily preview of mail pieces to be delivered?

The name of the optional, free daily preview of mail pieces to be delivered is known as Informed Delivery. This service allows users to see images of their incoming mail, along with the delivery date, in their email or online account. By providing this preview, Informed Delivery enhances the customer experience by allowing them to anticipate and manage their mail effectively. Users can see which letters and packages will be arriving, adding a layer of convenience and security, especially for those concerned about missing important deliveries. This utility aligns well with the growing trend of digital solutions to improve traditional mailing services.

The other options listed don't accurately represent this specific service. Mail Tracking typically refers to the ability to monitor the location and status of a package, Package Notification implies alerts specifically for packages, and Mail Alerts might suggest notifications for mail but does not specifically denote a preview service like Informed Delivery does.