The term DHL Alternative can refer to two different services: UPS (3 letters) and USMAIL (6 letters). UPS, or United Parcel Service, is a global package delivery company that offers express delivery services. USMAIL, or United States Postal Service, is a government-run postal service that provides mail delivery services throughout the United States. Both UPS and USMAIL offer alternative services to DHL, a German-based international courier, parcel, and express mail service.