To my knowledge, that problem doesn't exist anymore (if it does, the hotfix is still posted below). If you know of anyone having problems with registering, please PM me. If you can't register, please leave me a comment on my Steam profile (link) and add me (note, I won't accept you if you don't leave a comment)
You'll find the old post below following line.
we have been pointed to the fact that lately some people encounter problems when trying to register on this forum.
Apparently, this occurs when you're trying to register using an e-mail "[at]hotmail.com" as Microsoft puts "[at]focus-home.com" into a blocked domain. Hence, the mail will never arrive in your inbox, not even in the spam.
- Go to Inbox Options in live.com for Outlook (press the little cog next to your name in the top right -> More Email Settings)
- Click on Safe and blocked senders (below the caption "Preventing junk email"), click on safe senders
- Add "[at]focus-home.com" to the list
- Go back to forums and have activation account re-sent.
Thanks to Commissar Fuklaw for identifying the problem and providing a solution.