Tilbar is in charge of mail deliveries within Altador, but has so much work to do that he often enlists others to help him.
You got a package to deliver? No?
Good! I'm up to here with packages already!
Listen, you ever need a job, I'm sure I could give you some delivery work on the side.
I've got a local quick jaunt to deliver a package. You want to do it?
Good! Get this package delivered to Symond at the Alchemist's Shop!
Due to a glitch, Tilbar does not normally appear in game. However, it is possible to make him appear and complete his delivery quests normally.