Re: “This email appears invalid”
I saw something about a PHP function checkdnsrr being disabled in the latest build. That function is used in the bbPress function bb_verify_email.
I think the problem is that checkdnsrr is not available on Windows, and I’m not sure if it’s available on XAMPP. Here is how they fixed it in the latest trunk build:
https://trac.bbpress.org/browser/trunk/bb-includes/registration-functions.php
Here is the original bug report: