"We simply need fewer facilities to process less mail," Megan Brennan, said chief operating officer of the Postal Service.
 
The postal service has experienced fast decline in First Class mail due to the Internet, as more people use e-mail and online bill pay instead. In the last five years, for example, First Class mail volume has dropped 25 percent. Single-piece first class mail -- letters and such sent with a stamp -- has declined 50 percent in the past decade.