Update: E-mail service is restored. Please allow a few hours for the queued e-mails to make it to your inbox (also, always check the spam folder).
We are currently experiencing an issue with e-mail send outs via the Forum. The issue is located at our domain provider and there is currently not much we can do except awaiting their fix. In the meantime we will manually approve account requests via Twitter, @AirportCEO.
Thank you and have a pleasant day!