Answer:
Ancient Egyptians developed a postal service that dates back to 2000 B.C.; the oldest postal system in the world. The main mode of transportation was through the Nile River. The letters were placed in a box escorted by guards. At the time, the postal services were exclusive to the pharaohs. The postal museum displays messaged between Amenhotep and Akhenaten where they would update each other on political developments. As the methods of transportation developed, so did the post delivery service. The Ptolemaic era, 305 B.C., a new method of transportation was introduced. Carriers would deliver messages with the help of horses. This era also had the earliest documentation of what is now known as “express mail” and “regular mail”. The express mail services were exclusive to state officials and rulers while the latter was used by the wider public and was delivered by a postman on a donkey or mule.