Smart Mailbox The Geek December 30, 2013 Most Recent Mr. Postman is a smart mailbox that will alert you when your mail has arrived. You can also lock the mailbox after delivery so that your mail is completely safe. If you go out of town, you can easily ask a friend to pick up your mail for you by sending them a special code to unlock your mailbox. Would you use a smart mailbox? Leave a Reply Cancel Reply You must be logged in to post a comment.