Postmaster

The Postmaster is a human located in the Postmaster's Office in Dalaran. He is in charge of sending mail to characters and retrieval of items that were not rewarded into the player's inventory, usually because their inventory was full. He uses mailementals to help him sort mail.

Quests

 * Return to Sender (Legion)
 * A Huge Package
 * Priority Delivery
 * The Mail Must Flow

Gossip
The mail must go through!
 * Before completing the questline

Still plenty of letters to sort, if you're up to it!
 * Upon completing the questline

Or how about something more challenging? We also receive letters without a full address on them.

Think you can handle it?

Mail contents
Besides the lost item, the mail also contains the following text:

Trivia

 * When a player inquired on the EU General Forum as to who the Postmaster was, Aerythlea jokingly responded that the Postmaster's favorite color was grey. This is most likely in reference to when the Postmaster used to send every unlooted quality item to the character's mailbox.
 * The Postmaster questline was made by game designers Johnny Cash and Don Adams.
 * The Postmaster's office has tubes for delivering mail to all of the game's continents introduced up to Legion except for one,.