OSS File Download Triggers Email Sending

This lab mainly uses the Alibaba Cloud Direct Mail service. It demonstrates how to use the event listening mechanism of Object Storage Service (OSS) to send a message to a message queue when a file is downloaded. It also demonstrates how to use Direct Mail SDK to send this message to a target mailbox. Direct Mail is an easy-to-use, reliable mail delivery service that is built on Alibaba Cloud. It allows you to send transactional emails, notification emails, and batch emails rapidly to tar