public function queue($from, $to, $subject, $text, $priority = 0, $files = [], $bcc = null)
    {
        if (is_array($bcc)) {
            $bcc = implode(', ', $bcc);
        }

        $model = new Message();
        $model->from = $from;
        $model->to = $to;
        $model->subject = $subject;
        $model->text = $text;
        $model->priority = $priority;
        $model->files = $files;
        $model->bcc = $bcc;

        return $model->save();
    }