You need to enter an e-mail address when you register for an account on the Official Spacetime Studios Message Forums. As you proceed to finish the registration, the forums will send you an e-mail with a link that you need to click to finish creating your account. If you do not click the link, you will not be able to post.
Please click the activation link in the email you were sent, or visit the page at: https://www.spacetimestudios.com/register.php?do=requestemail to resend the activation email. If you did not receive the email then it's possible it was blocked by your email client. In this case you can either disable your blocker software or enter a new email address in your profile at: https://www.spacetimestudios.com/profile.php?do=editpassword
If you cannot get it set up, submit a request using the "Email Us" link on the right side of the page.