(David Goldman | The Associated Press) In this Feb. 7, 2013, file photo, U.S. Postal Service letter carrier Jamesa Euler turns down the flag on a mailbox while delivering mail in the Cabbagetown of Atlanta. The U.S. Postal Service delivers mail to 11 million more homes, offices and other addresses than it did a decade ago, even as the amount of mail that people in the United States receive has dropped sharply. That combination may be financially dicey, some analysts say.