Postal boxes, also known as mailboxes, are secure containers used for collecting outgoing mail. They are typically found in public places, such as streets or post offices, and are designed to keep letters and packages safe until they are collected by postal workers. Postal boxes come in various sizes and colors, often marked with the logo of the local postal service, like the United States Postal Service. People can drop off their mail in these boxes, which are emptied regularly by postal employees. The mail is then sorted and delivered to its destination. Postal boxes play a crucial role in the postal system, ensuring that communication remains efficient and secure.