As a mail carrier, your duties are to sort, process, deliver, and collect letters, postcards, and packages from a customer’s house, a mailbox, or a sorting facility. Depending on where you live, you may drive a mail truck or car or deliver mail by bicycle or on foot. If you live in a rural area, your responsibilities may include carrying postal supplies, such as envelopes and stamps for sale. Mail carriers must interact with people on a daily basis and provide customer service, such as giving people change of address forms or other official documents.