The latest plans to save the U.S. Postal Service are in the mail.In a report released Wednesday, the agency announced plans to reduce hours at 241 post offices in Tennessee – including three in Warren County. Impacted will be post offices in Viola, Rock Island and Campaign.The move comes amid growing financial losses at the Postal Service. On Thursday, the agency reported a quarterly loss of $3.2 billion and blamed Congress for blocking its cost-cutting efforts to offset declining mail volume and mounting costs for future retiree health benefits.Unlike previous efforts to halt mail delivery on Saturday, which requires congressional approval, the Postal Service can reduce hours on its own.“We can move forward with this whether Congress approves it or not,” Postal Service media specialist David Walton told the Standard on Friday.