The U.S. Postal Service considers mail to be delayed when it’s not processed in time to meet the established delivery day. Pretty straightforward, isn’t it? But determining whether mail is actually delayed — even when it’s reported as delayed — isn’t always a straightforward proposition. Take, for instance, what happened when we analyzed delayed mail volume at mail processing facilities nationwide from January 1 to December 31, 2020. We found the North Houston Processing and Distribution Center