mailboxes

A mailbox is a receptacle designed to receive incoming mail from postal services. They range from small wall-mounted units for individual homes to larger housings servicing multiple residences, and from curbside mailboxes to parcel lockers. In many countries, mailboxes are part of a formal postal-delivery system with guidelines on placement and security.

Common configurations include curbside or street-level mailboxes mounted on a post near the curb; wall-mounted mailboxes installed at a residence or business; cluster mailbox units (CBUs) used in new housing developments; and parcel lockers located in apartment buildings, shopping centers, or transit hubs that deliver packages securely.

Materials and features vary: metal (galvanized steel, aluminum, or stainless) and weather-resistant plastics are common. Many mailboxes have a hinged door with a seal and, in many jurisdictions, a locking mechanism. A flag is often used on curbside boxes to signal outgoing mail. Size varies for letters, flats, and small parcels. In the United States, curbside and wall-mounted mailboxes are subject to postal-service standards for installation, size, and placement to ensure reliable delivery.

Placement and maintenance: mailboxes should be installed at an accessible height and distance from the curb, with durable mounting to resist wind and tampering. Owners must comply with local regulations and homeowners associations. Security concerns include vandalism and theft; locking boxes and sturdy designs are used in higher-risk areas.

Global variations: some countries use integrated mailbox systems in entranceways, while others rely on PO boxes at post offices. The rise of e-commerce has increased the use of parcel lockers and secure delivery options to reduce doorstep theft.