Just had a couple of experiences with prestashop/One page checkout I would love to avoid, the way prestashop/One page checkout is checking if an email is valid, is not living up to what I am used to. A normal thing to do is to validate if the domain first of all got an mx record, it looks like prestashop is not doing this ad all, we just had a costumer entering Hotmail.con instead of .com and it validated that, I would normally use checkdnsrr, and filter_var($email, FILTER_VALIDATE_EMAIL). Just wondering why leave something flawed when there is methods that could help you avoid running in to issues like this? I am not 100% sure if it’s Prestashop or One Page checkout that’s validating the e-mail, but no matter what it’s flawed, and I need to figure out a way to either edit the core and ad some sort of better e-mail validation, or find a module that actually ads it.