protected function sendActivationEmail()
    {
        $forum = Podium::getInstance()->podiumConfig->get('name');
        $email = Content::fill(Content::EMAIL_REGISTRATION);
        if ($email !== false) {
            $link = Url::to(['account/activate', 'token' => $this->activation_token], true);
            return Email::queue(
                $this->email,
                str_replace('{forum}', $forum, $email->topic),
                str_replace('{forum}', $forum, str_replace('{link}',
                    Html::a($link, $link), $email->content)),
                !empty($this->id) ? $this->id : null
            );
        }
        return false;
    }