Express Mail is a next-day delivery service offered by the U.S. Postal Service (USPS) that guarantees next-day delivery for shipments between major U.S. cities. This service is applicable for letters or packages weighing up to 70 pounds. Postage costs vary based on weight, distance, and the specific type of Express Mail service used.
FedEx Corporation, originally known as Federal Express, is a multinational delivery services company known for revolutionizing logistics and overnight shipping.
