As a postal service carrier, your responsibilities are to deliver mail along your designated route and provide your customers with customer service assistance. In rural areas, mail delivery jobs may include increased clerical and customer service duties to assist those who live very far from a post office. This includes providing customers with forms for change of address or selling them stamps. In a suburban or urban setting, a mailman delivers mail via a truck or by foot, depending on the size of their route. Some mail carriers also help clerks or sorters to sort mail before delivery.