mail clerk

noun3

1. •
   a person who does clerical work in a post office.
2. •
   a person who handles mail for a business or other establishment.
3. •
   a person who sorts mail in a mail car on a train.

   • Flange-stacked and cone-nosed, a Nashville, Chattanooga & St. Louis J-3 4-8-4 gives the mail clerks a look at the trim Alco as she leads the Dixie Limited out of Smyrna, Ga. — 1959