📮 A postbox is a sturdy, typically metal, container with a hinged door that serves as a receptacle for outgoing mail. It is usually mounted on a street corner or in a public area, allowing individuals to conveniently deposit their letters and packages for collection by postal workers. Postboxes often feature distinctive colors and markings to indicate their purpose and are an essential part of the postal system, facilitating the efficient delivery of mail to its intended recipients.