There can be several reasons why you did not receive an activation email.

• There was a typo in the email address when you registered on edx.org.
• For some reason, you might not have successfully registered an account on edx.org.
• The automated activation email message was caught by your spam filter.
• Your email provider might have blocked the automated email message.

Here's what you can do.

• Check your spam or junk mail folder for an email from no-reply@registration.edx.org.
• Add no-reply@registration.edx.org to your email contacts or approved senders list.
• Try registering again with the same email address. If the account already exists, you'll see an error indicating that there is a duplicate email address.
• From the edx.org log in page, click "Reset my password". The password reset message will activate your account.