bedezign\yii2\audit\controllers\MailController::actionDownload PHP Method

    public function actionDownload($id)
    {
        $model = AuditMail::findOne($id);
        if (!$model) {
            throw new NotFoundHttpException('The requested mail does not exist.');
        }
        Yii::$app->response->sendContentAsFile(Helper::uncompress($model->data), $model->id . '.eml');
    }