Abstract: A curbside mailbox kit, compliant with 39 U.S.C. 111 (Feb. 8, 2001), comprising: a base, two sides, an optional signaling flag, a roof, a rear side, and a front door, wherein the mailbox kit is provided in an unassembled form having a void cross section substantially less than 30 square inches, and having a void cross section when assembled of at least 30 square inches. A mailbox, comprising a base, hinged front panel, rear panel, two side panels, and a top, each of the two side panels being attached to the base by a hinge. A mailbox kit, comprising two planar sides, a planar base, a planar rear panel, a hinged planar front door, and a top, the sides, base, rear panel and front being provided in a package with their respective planes parallel, the kit being adapted to be assembled into a box.