An example of the Informed Delivery email. Courtesy of U.S. Postal Service hide caption toggle caption Courtesy of U.S. Postal Service All Tech Considered New USPS Service Gives You A Peek Into Your Mailbox Before You Get Home March 27, 2017 Remember when you were excited to see what's in the mail? These days it seems we're getting fewer letters and more junk, but the U.S. Postal Service will soon let you preview what's coming your way.