What is another word for "postal"?

Roget's Thesaurus (1911) lists these synonyms for "postal": analytical, arroba, avoirdupois, baby, balance, ballast, beam, billet, billet-doux, bulletin, burden, burdensome, burthen, carat, card, centigram, chit, chitty, circular, correspond, correspondence, counterpoise, cumber, cumbersome, cumbrous, despatch, dispatch, drachma, epistle, epistolary, favor, grain, gram, gravitate, gravitation, gravity, heaviness, heavy, hundredweight, incumbent.