Informed Delivery - Mail & Package Notifications | USPS
https://informeddelivery.usps.com/box/pages/intro/start.action
WEBInformed Delivery is a free service from USPS that shows you preview images of incoming mail, plus status updates about your incoming and outbound packages. Get notifications in a morning Daily Digest email, or at any time from the dashboard using your smartphone, computer, or USPS Mobile app.
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