They if they let us do this they won't make money on everyone who has all the extra retainers... so it'll neeeever happen.

Your best bet is to find an FC that's generous enough to allow you to use a page on the CC to move items between characters. If you're logging and grabbing right away it shouldn't be a problem.... or you can ask a friend you trust to trade / or mail it back to you.

I understand its more convenient to just be able to mail yourself something but it wont happen, cause money.