Dead letter mail or undeliverable mail is mail that cannot be delivered to the addressee or returned to the sender.ith increased collection and study of the postal markings originating from such offices, the body of literature on this obscure topic may grow. Many countries, including Canada and the United States, have issued special labels for envelopes that have travelled through the dead letter office.
For other uses, see Memphis (disambiguation). Memphis is a city in the southwestern corner of the U.S. state of Tennessee and the county seat of Shelby County. The city is located on the fourth Chickasaw Bluff, south of the confluence of the Wolf and Mississippi rivers. Memphis had a population of 653,450 in 2013, making it the largest city in the state of Tennessee.
Memphis had a population of 653,450 in 2013, making it the largest city in the state of Tennessee. It is the largest city on the Mississippi River, the third largest in the greater Southeastern United States, and the 23rd largest in the United States.