postmasters

/P OW1 S T M AE0 S T ER0 Z/
noun
  1. 1

    The head of a post office.

  2. 2

    The administrator of an electronic mail system.

  3. 3

    A kind of scholar at Merton College, Oxford; portionist.

  4. 4

    One who has charge of a station for the accommodation of travellers; one who supplies post horses.

Source: https://en.wiktionary.org/wiki/postmaster, https://en.wiktionary.org/wiki/postmasters