There are a few common causes for verification emails not coming through to you.

1. Please try following the 'forgotten password' flow - this will allow you to verify your email address if the failure was a one off.

2. Please check with your email account administrator that they are not blocking emails from *@sans-foundations.com.

3. It is possible that you originally signed up with an incorrect email address. In this case, please try signing up again with the same license code and a new email address. The license code will still be valid up until the email address it is linked to is verified.