posts on horseback. couriers on horseback. Haman's "posts" were runners on foot (Esther 3:13; Esther 3:15), hut speed was now essential. See Esther 9:1.
Related Commentaries of Esther 8:10
Esther 8:10
10 And he wrote in the king Ahasuerus' name, and sealed it with the king's ring, and sent letters by posts on horseback, and riders on mules, camels, and young dromedaries: