This is common lately. On a website they say we will send you an email to validate your email. This was with Costco for one. I click in the box so they can send me an email, then I go look and there is no email. Tried many times to no avail. Other websites too, like, click the save 10% coupon then we will send it to your email entered on the website. No email received. By the way it doesn't seem to be a pop up blocker issue.