The preposterous part is that you can send EX items (which aren't tradeable to anybody at all) but you cannot send normal items which are marked as "no-AH" that can be traded or bazaared.
That's really ridiculous, it makes no sense with the logic with how EX items were created.
Their reply as to why they're not making some of these items (namely in that example it was Beastly Shanks) sendable made even less sense.