java 上的邮件守护进程
我需要在 java 或 node.js 上创建类似邮件守护进程的东西。我们有一个用 PHP 编写的高负载项目，它会生成大量电子邮件注册/更新/等。目前，所有消息在处理（语言/模板）后都被放入 mongodb 中。我正在考虑编写一个小守护进程，它将每秒检查 mongo 中的新消息并将其发送出去。
我对 Java 或 Node.js 有点陌生，不想再创建一辆自行车。有人可以指出我正确的库或类似的东西吗？
PS：它应该是快速、异步和独立的。
I need to create something like mail daemon on java or node.js We have a highload project written on PHP which generates a lot of e-mail registrations/updates/etc. Currently all messages are being put into mongodb after processing (language/template). I'm considering writing a small daemon which will check for new messages in mongo every second and send them out.
I'm a little new to Java or node.js and don't want to create another bicycle. Can someone point me to the right lib or something like that?
PS: It should be fast, async and standalone.
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我建议在本地设置一个 SMTP 服务器，然后让 PHP 项目在生成邮件时将其直接发送到该 SMTP 服务器。这正是此类服务器所针对的优化场景。
您可以安装本机版本或 Apache James（用 Java 编写）。我可以推荐 postfix，它是 Ubuntu 的标准配置并且易于设置。我没有使用 Apache James 的个人经验，但它似乎是针对中低站点的完整服务器解决方案。
I would recommend setting up a SMTP-server locally, and just have the PHP project send the mails directly to that SMTP-server as they are generated. This is the exact scenario that such servers are optimized for.
Either you can install a native one or Apache James (which is written in Java). I can recommend postfix which is standard with Ubuntu and easy to setup. I do not have personal experience with Apache James, but it appears to be a complete server solution for low to medium sites.