Universal mail box mounting base

A mounting bracket for mail boxes, said mounting bracket comprises oppositely disposed sidewalls, opposed end walls, a top surface and a bottom surface, a plurality of interconnected rib walls extending between said respective end walls and sidewalls, compartments formed between said rib walls, a plurality of spacing elements removably secured within said compartments, said spacing elements having interconnecting means to one another and said adjacent rib walls within their respective compartments, some of said spacing elements are-of a known length less than that of said remaining spacing elements, flanges extending inwardly from said rib walls in spaced relation to one another defining said bottom surface, lug means on said flanges, some of said spacing elements define blocks having sidewalls, apertured end walls and integral top, means depending from said rib wall's bottom surface for securing the bracket to post means.