User registration

I check through my forum database and screen through the inactive users list. There's one user called view_rance which registered on April 17th with email of view_rance@yahool.com.I supposed if user enters the wrong email, hence forummer cant receives the verification email. For those who wish to access the forum, you need to enter the right email. After receive the verification email, kindly forward to me together with your name and unit no.

Upon receiving this info, only your account will be approved for activation. As you can see, my forum is subject to spammer attack. I cant determine the genuine registration based on the username. Your help is much appreciated.