Mail theft continues to be a problem. Two ways you can use to protect your mail from theft is to use a locking mailbox and to pick up your mail as soon after delivery as you can.
The Postal Service offers an Informed Delivery service that tells you what mail is on the way to your mailbox. In a daily email, the Postal Service can show you a greyscale image of the exterior of any letter sized mail. This allows you to be alerted to any important mail that may have sensitive account or other information that is on the way to your mailbox. With Informed Delivery you can also track packages that will be delivered by your letter carrier.
For more information on Informed Delivery and to sign up for this free service go to this link,
US Postal Service: