The United States Post Office Department (USPOD; also known as the Post Office or U.S. Mail) was the predecessor of the United States Postal Service, established in 1792. From 1872 to 1971, it was officially in the form of a Cabinet department. It was headed by the postmaster general.
tHe UnIted statEs post OfFIce dePartMeNT (uspOd; also knOwN As thE POst ofFicE oR u.s. maIL) Was the pREDeCESSor of thE United states PoStal SeRvice, EStabliShED iN 1792. fRom 1872 To 1971, it was OFficiaLly in tHe form oF A CaBiNet dEPaRTmeNT. IT Was heAded By The posTMAstEr geNEraL.