Haraka - a Node.js Mail Server

https://github.com/baudehlo/Haraka#readme

看作者的自述：Haraka is a project started by Matt Sergeant, a 10 year veteran of the email and anti-spam world. Previous projects have been the project leader for SpamAssassin and a hacker on Qpsmtpd, a perl based mail server which is quite similar to Haraka (but not as fast due to perl being slower than Javascript).

貌似不是一个蛋疼的项目... 刚刚发布 0.6.0 版本

Why Use Haraka?

Haraka's primary purpose is to provide you with a much easier to extend mail server than most available SMTP servers out there such as Postfix, Exim or Microsoft Exchange, yet while still running those systems for their excellent ability to deliver mail to users.

postfix 一直没有增加 libevent 的支持，对一个这么活跃的项目，以及这么被广泛使用的服务来说有点异乎寻常。从理论上来说，一个邮件系统的I/O能力是被其磁盘信件队列的I/O能力限制住了，所以网络I/O不追求高并发也可以理解。

但是考虑到垃圾邮件，潜在的DDoS攻击，在 postfix 之前弄一个这玩意确实值得考虑。

以前曾经想过用 twisted 做类似的东东，现在看来又多了一个新选择。

最后要说的是，node/v8 的 gc 确实很蛋疼