Bestätigungsmail bei Nutzerregistrierung ersetzen

/**
* createUser function.
* 
* @access protected
* @param mixed $userid
* @return void
*/
public function createUser($email, $firstname, $lastname, array $usergroups)
{
    $user                         =         new JUser;    
    $username                    =        $email;
    $email                        =        $email;
    $name                         =         ucfirst($firstname)." ".ucfirst($lastname);    
$password                     =        JUserHelper::genRandomPassword();             


    $data                         =         array(
                                            "name"        =>        $name,
                                            "username"    =>        $username,
                                            "password"    =>        $password,
                                               "password2"    =>        $password,
                                               "email"        =>        $email,
                                            "block"        =>        0,
                                            "groups"    =>        $usergroups
                                            );


if(!$user->bind($data) OR !$user->save()) 
    {
        $this->errors[]            =        $user->getError();
    }


return $user;
}