usps sunday shipping

usps sunday shipping is limited primarily to specific parcel services such as Amazon Sunday delivery and Priority Mail Express. Unlike Saturday delivery, which is standard for USPS, Sunday operations are not widely available for general mail or packages unless they meet express-level urgency or fall under Amazon’s fulfillment arrangements. Retail customers should be aware that Sunday delivery may incur additional fees and isn’t universally available. It’s most useful for urgent items in high-density urban areas where USPS partners with Amazon for last-mile delivery.