Mailboxes come in all shapes and sizes and include curbside boxes, wall mounts, mail slots and lock and key boxes.
Curbside or post-mounted mailboxes are on the side of the road and generally appear in rural and suburban locations.
Wall-mounted mailboxes are common in urban areas; the box mounts by the front door of a home, and the postal worker deposits the mail inside.
Mail slots are an opening in the front door. The postal worker places mail into the slot so it falls to the floor inside.
Lock and key
Post-office boxes are examples of lock and key mailboxes. Businesses often use these secure boxes, as do people who want a stable private address. Boxes can be rented from post offices on a month-to-month or annual basis.
Wall-mounted and curbside boxes also have lockable versions. Apartments often have wall mount clusters in the lobby of the building. Each apartment has a secure box within the cluster.
A variation on this design is the neighborhood cluster for homeowners. Some U.S. neighborhoods have pedestal cluster boxes where each homeowner on the street receives mail to a particular box within the grouping. Neighborhood clusters are often at the side of the road.