\Events::addListener('on_user_add', function($event) {
 
   $user = $event->getUserInfoObject();
 
   $mh = \Core::make('helper/mail');
 
   if (\Config::get('concrete.user.registration.email_registration')) {
        $mh->addParameter('uName', $user->getUserEmail());
        \Log::info(sprintf('Added user %s', $user->getUserEmail()));        
    } else {
        $mh->addParameter('uName', $user->getUserName());
        \Log::info(sprintf('Added user %s', $user->getUserName()));
    }
 
    //generate hash that'll be used to authenticate user, allowing them to change their password
    $h = new \Concrete\Core\User\ValidationHash();
    $uHash = $h->add($user->uID, intval(UVTYPE_CHANGE_PASSWORD), true);
    $changePassURL = \View::url(
            '/login',
            'callback',
            'concrete',
            'change_password',
            $uHash);
 
    $mh->addParameter('changePassURL', $changePassURL);
 
    $fromEmail = (string) \Config::get('concrete.email.forgot_password.address');
 
    if (!strpos($fromEmail, '@')) {
        $adminUser = \UserInfo::getByID(USER_SUPER_ID);
        if (is_object($adminUser)) {
            $fromEmail = $adminUser->getUserEmail();
        } else {
            $fromEmail = '';
        }
    }
    if ($fromEmail) {
        $fromName = (string) Config::get('concrete.email.forgot_password.name');
        if ($fromName === '') {
            $fromName = t('Forgot Password');
        }
        $mh->from($fromEmail, $fromName);
    }
 
   $mh->to($user->getUserEmail());
   $mh->addParameter('siteName', tc('SiteName', \Config::get('concrete.site')));
   $mh->load('welcome'); //my custom email, which lives in application/mail
    @$mh->sendMail();
 
});