Hi,
how could i modify the index.php of the your account module to force people to register with an email address from a certain domain. For example, a person must have an email account that ends in '@yahoo.com'. And if not, it displays an error, as if you entered invalid password or mismatched passwords, etc.

Thanks in advance. I dont think it should be too hard?

Nevermind, i decided to have users only register their username, before the domain. so only register jon.doe as opposed to jon.doe@yahoo.com