The U.S. Senate passed a bill Saturday preventing the postal service from raising postage rates past the rate of inflation during the next ten years. The new law would stabilize rates for households and bulk mailers. It will also help the postal service battle against delivery companies. By agreeing to the change, the post office will be relieved of billions of dollars' worth of debt related to pensions and health care. This new bill will be the first major change for the postal service since 1970.