Hello and sorry you're having a problem with the Puzzlements mailer. If you're accessing the site from a school network or using a school email address, you'll need to contact your district's tech folks. They're almost certainly doing something funky.
Otherwise, here is my best advice if you're not receiving the emails:
If the links are being blocked somehow at your school, you'll (again) need to get your tech people to fix it since they are the ones who broke it!