"Express Mail" is designed to provide a premium service that includes guaranteed overnight delivery and tracking, making it a reliable option for urgent mailing needs. The guarantee of next-day delivery ensures that customers can trust their important documents or packages will arrive promptly, which is a significant advantage for both personal and business correspondences. The tracking feature enhances this service further by allowing senders and recipients to monitor the progress of their shipment in real-time, providing peace of mind and enhancing accountability.
Other options such as standard delivery, extended delivery times, or lower postage rates do not align with the nature of Express Mail. This service is specifically tailored to meet the needs of customers who require fast and secure mail delivery rather than standard or slower options. Moreover, Express Mail rates reflect the expedited nature of the service, which typically come at a premium rather than offering lower postage rates. Thus, the features of Express Mail focus primarily on speed, security, and reliable tracking capabilities.