EDIT 8/6/2017: email sending is back to normal. We’ve resent emails with activation codes to all users that registered during the period while the email service was not working properly.
As some of you reported, Freesound is experiencing problems with emails. We have identified the issue and worked out the fix, but are still waiting for our email provider to do some extra stuff. We hope that email sending will go back to normal in the following hours.
After all email problems have been fixed, we will re-send activation emails to those users who registered after the problems started and could not activate their accounts.
In the meanwhile please be patient 🙂