Mail: Information, Public or Private: Carried by a Courier
Source: Nav
Esther 3:13
And the letters were sent by couriers to each of the royal provinces with the order to destroy, kill, and annihilate all the Jews—young and old, women and children—and to plunder their possessions on a single day, the thirteenth day of Adar, the twelfth month.
Esther 8:10
Mordecai wrote in the name of King Xerxes and sealed it with the royal signet ring. He sent the documents by mounted couriers riding on swift horses bred from the royal mares.