letter carrier 
noun North American
A postman or postwoman: my letter carrier dropped off an envelope containing a press release...
- I'm a letter carrier and I walk 12 to 15 miles a day and I was on your diet.
- Once in Rhode Island, 94,000 letters were found buried at a letter carrier's home.
- A letter carrier for the U.S. Postal Service, she still dutifully sorts all the mail addressed to ‘One World Trade Center,’ and primes it for delivery.