Paper rustle as sheet of paper or letter stuffed into envelope.
Post office ambiance with crowd chatter, coughs, and working sounds in the distance.
Hockey puck hit, double tap, post ring
Hockey puck hit, impact post, metal clank
Metal pole bounces then settles on hollow wood.
Metal post hitting solid wood.
Letter post box flag put down
Letter post box. open and close
Letter post box open and close
post officer working sorting letters in a busy post office.