In the U.S. the carrier remains on the road, stops at a roadside mailbox and places mail in it without leaving the vehicle.
U.S. Mail carriers always get out of their vehicles when delivering mail.
mnli hypothesis: U.S. Mail carriers always get out of their vehicles when delivering mail. premise: In the U.S. the carrier remains on the road, stops at a roadside mailbox and places mail in it without leaving the vehicle.