We don't have synonyms for postmen yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are postman, ostmen and potmen.
(n) :
(chiefly UK, Ireland, Commonwealth) Someone who delivers the post (mail) to, and/or collects the post from, residential or commercial addresses, or from public mailboxes.
(n) :
(England, historical) One of the two most experienced barristers in the Court of Exchequer, who have precedence in motions, so called from the place where he sits, the other of the two being the tubman.
(n) :
(chiefly UK, Ireland, Commonwealth) Someone who delivers the post (mail) to, and/or collects the post from, residential or commercial addresses, or from public mailboxes.
(n) :
(England, historical) One of the two most experienced barristers in the Court of Exchequer, who have precedence in motions, so called from the place where he sits, the other of the two being the tubman.