The letter addresses the deplorable state of the postal service, criticizing the current routing system and excessive spending by the Postmaster General, Mr. Bolger. The author suggests that motorized service should be implemented in residential areas and that city parcel delivery should be discontinued. The letter also mentions problems with mis-sent letters and proposes that a billion-dollar zip code system would be confusing and unnecessary. The author urges Congress to take action and improve the postal service.