java web服务器如何监听服务器上的sendmail接收到了邮件，或者sendmail收到邮件后能通知web应用

Question

服务器用sendmail来收发邮件，我需要在sendmail收到邮件立刻通知web应用，然后用web应用来解析这个邮件，包括邮件里的附件，请问有什么办法
监听文件夹？监听端口？有这样的系统通知接口码？linux centos

Answer 1

This requirement can be fulfilled directly using a third-party email platform. Most of them have webhook functions. For example, the event types supported by domestic sendcloud webhooks include: request, send, open, click, unsubscribe, soft Bounce, report, invalid email.
For the selection of relevant email platforms, please read this article

Answer 2

https://portal.qiniu.com/wechat-app/about

Answer 3

Message queue, web program listening queue