Burnout

Category: Battle
Achievement: Malowned

To fight Postmaster Malown you first have to make him spawn. In order to do that find and right-click a letter that is lying hidden inside the dungeon. Once you've done that go to the mailbox at 57.8 13.6 (in the vicinity of Nefarious Terry) and he'll appear. Now you have 20 minutes to fight him. After that time Malown will disappear. Beating him rewards you with the achievement Malowned and the pet Burnout.

There are multiple points where the letter can spawn, though it's not guaranteed it will be there.

/way 68.9 54.0 Letter
/way 59.7 40.6 Letter
/way 56.9 50.8 Letter
/way 57.8 36.9 Letter
/way 40.2 10.4 Letter
/way 48.6 24.9 Letter
/way 57.8 13.6 Mailbox

All our strategies for the fight against Malown can be found here.