there is no forward command in WoW for email the items are detached and re attached by addons that have one, thus binding it. Furthermore trying to forward the mount to another account would be an exploit and this is not allowed to be discussed here.

As for where to get the mount, if you used a game card (and this only works with game cards) go the the RAF screen on the vet and choose what toon it should be mailed to, and it will appear in a few hours or less. (mine took two tries before it took and was there instantly when it did) If you did not pay by game card, you will need to wait two billing cycles to get it.