You just need to scroll past the understandable ranting of disgusted customers and the terrible answers by Microsoft support staff - you'll find an answer from "Windows Live John Dominic U.", that apparently helped out the guys in that thread that had that problem. Cliff notes: when sending an email, WLM assumes, that you use Hotmail anyway, because that's just how MS rolls, and creates an album online. Now when you don't use Hotmail or w/e MS ****, then that step fails, and it produces the error number you get, for which apparently 90% of MS staff can't tell what it means. The solution is to send it as an attachment instead of inline - or so I guess, I mainly skimmed that thread. But following that guy's guidelines seems to help.
(Cacher) Si vous ne consultez que quelques uns des forums de discussions sur une base régulière, vous pouvez les ajouter à la liste de vos forums favoris en allant sur la page du Forum et en cliquant sur "Ajouter à la liste des forums favoris". (pauloaguia) (Montrer toutes les astuces)