Junk Mail, the Environment, and Market Access

Over at the Conglomerate, Gordon Smith complains about all the junk mail he gets and says: "... I am willing to vote for the presidential candidate who proclaims, 'I look forward to nailing the going out of business sign on the front door of the United States Postal Service.'"  Of course, there's not much chance of this actually happening.  But putting reality aside for a moment, couldn't this be a great "win-win" for trade and the environment?  Cutting out all that wasted paper from unwanted junk mail would save a lot of trees.  And getting rid of a domestic monopoly would make foreign competitors very happy with their improved market access possibilities.