Missing Heirloom Weapon

Q u o t e:
i had an inactive account for a couple months and now i cant find one of my Heirloom 2h axe. it might have been in my mailbox.

If you have not checked the mailbox in awhile and the item was still in there, chances are it has been deleted, Derkk.

I was able to locate this Knowledge Base article that may be of some assistance:

What happens if I do not pick up my mail regularly?
http://us.blizzard.com/support/article/20139

Q u o t e:
Be sure to check mail regularly as it does expire after a certain period of time:

- Normal mail: expires in 30 days, upon which the item is deleted.
- Package: expires in 30 days, upon which the item is returned to sender.
- C.O.D.(Cash on Delivery): expires in 3 days, upon which the item is returned to sender.

For more information regarding the in-game mail system please visit: http://www.worldofwarcraft.com/info/basics/mail.html

If the mail has been deleted, the Game Masters are unable to recover the item.