New submitter cstacy writes "The United States Postal Service will be closing half of its processing centers this spring. Currently, 42% of first-class mail is delivered the following day for nearby residential and business customers. But that overnight mail will be a thing of the past, with delivery guaranteed only for 2-3 days. About 51% will be delivered in two days. Periodicals may take up to nine days. (Additional delays beyond this may come into play when Congress also authorizes USPS to close operations for some days each week.)"