I want to create an system to check some emails from a list, if there are blacklisted or not. More example, I want to create a MySQL table where is put some emails like @gmail.com or @yahoo.com
Now, I want to create a PHP function that check if email is on blacklist, for example on a registration form, user try to join with an email like [email protected], I want to return error, because @yahoo.com is on blacklist. I don't know to explain better, but I think you understand what I want.