It seems like the confirmation emails are okay now, but I just picked up the domain name "quadcopterforum.com", so I'm going to be redirecting the forum to that name. Messages may go to the spam folder once again until email gateways realize that the messages are legitimate. Gmail and others like to send messages to the Spam folder when they start seeing email being sent from a new domain until enough people mark them as "not spam".
Please continue to check your Spam folder if you don't see your confirmation email and if it's in there, be sure to mark it as "not spam".
If you have any issues, please use the "Contact Us" link at the bottom of the page, or email us at admin (at) quadcopterforum.com
Thanks!