Other forms: messengers
Use the noun messenger to refer to someone who brings you a message. Your mail carrier delivering a postcard and your gossipy friend calling to give you the latest news can each be described as a messenger.
Delivering messages for others is certainly a time-honored profession, since even the gods of Antiquity needed someone to do it — the Greeks had Hermes and the Romans had Mercury as their messenger gods. A messenger carries a message, and that's where the word itself comes from: the Latin root of message is missus, which means "a sending away, sending, dispatching" and is the past participle of mittere, "send."