I'll have a poke over our forum's email server just to double check things are working properly but I've been receiving all notification emails from it.
Looks like Microsoft's ever over-zealous IP blocking managed to peg the forum's email server for some reason. This should be fixed right up in a few hours.
Since you're using live.com for mail this is why you didn't get the emails - they bounced. Nothing else is listed so everything except Microsoft mail has been working fine.