ragectl said:

    I have noticed in Classic one of the mail boxes is showing in a strange location in The Barrens. It’s showing in the mountain between The Barrens and Dustwallow Marsh.
    I am Horde, so I don’t think there should be any mailbox for me in Dustwallow Marsh, and certainly not stuck in a mountain.
    The co-ords for the mailbox are listed as 50.68, 70.08 in The Barrens.
    I checked the list of mail boxes on WoWhead, and it’s not listing anything near that location.

    then that should be reported to blizzard