A registration bug was reported where users who unchecked the "receive email from administrators" box did not receive the activation email needed to activate their accounts. Users had to register again with the box checked to successfully receive the activation email. There was confusion about whether users could still receive emails even if they opted out, with the consensus being that spam filters might discard these emails. It was clarified that the confirmation email could be sent but not seen due to spam filtering. The discussion highlights the importance of checking spam settings when facing email issues during account registration.