Manually approve and reject newly registered users before they can log in to their account. You can also as block and unblock users whenever you want.
Stop Spam Registrations
When a user that is blocked or yet to be approved tries to log in, they are locked out.
As an admin, you can approve pending users, block and unblock user accounts.
Customizable Triggered Notifications
You can customize the content of the email sent when a user is approved, rejected, blocked and unblocked as well as the notification to admin when a user is pending approval.