Mailemental

Source
The Mailemental is an achievement reward from Post Haste.

Pet Journal
''The Postmaster is often described as esoteric, mystical, even inexplicable. For the precious little known about the enigmatic mail-master, perhaps none outside of the wax seal can confirm the existence of the fantastical letter-loving Mailemental.''

Trivia

 * During the PTR, the mailemental used Life Exchange instead of Junk Mail.