U.S. Postal Service letter carrier Jamesa Euler, delivered mail in the rain in the Cabbagetown neighborhood, in Atlanta on Feb. 7. The U.S. Postal Service says it will delay plans to cut Saturday mail delivery because Congress isn't allowing the change. The Postal Service said in February that it planned to cut back in August to five-day-a-week deliveries for everything except packages, as a way to hold down losses.