Dec 28th 2011 4:14PM Slooooooooooww... yes please!
Dec 25th 2011 8:53PM North America please
Dec 19th 2011 10:26AM do want!
Dec 18th 2011 4:41PM pleasepleaseplease
Dec 17th 2011 9:48AM Kitteh!!
Dec 16th 2011 3:58PM Oooh stylin'! Chair please!
Dec 15th 2011 4:21PM ZOMG yes please!!!
Dec 15th 2011 10:48AM That'd be awesome!! *crosses fingers*
Nov 26th 2011 4:26PM Naw, those mailboxes are all magical mailboxes. Address your letter, put it in the box and blammo, it zooms off to the closest mailbox to the recipient, zipping from box to box until it's picked up. I can't imagine a mortal mail carrier trying to deliver mail from Azeroth to Outland. Magical mailboxes is the only solution I can think of.
TLDR: A wizard did it.