This does happen from time to time . . . but it's not the email, it's your email settings!
Its an easy fix! You will just need to copy the hyperlink and paste it into your browser and you'll be able to continue on with the sign up.
If you have already attempted to copy and paste the link into your browser and you are still not getting to where you need to be, please send us an email at firstname.lastname@example.org.