Mail issues can also be aggrevated by local policies. I know a former regional postmaster from Wisconsin. I've since learned that during the Scott Walker years, they changed the service in WI so that all mail in the entire state is sorted in Milwaukee. So if I'm up in NW WI and I send a letter to someone a town over, the mail needs to be driven all the way across the state to Milwaukee, sorted there, and then driven all the way back. He says it's making what use to be a 1-day delivery into 3+.