There are many users that are using RainLoop since it is very easy to use since it is much easier to navigate and it has functions very similar to what common users are using which is gmail. What is RainLoop?

发现网上关于Dovecot2的配置资料相对较少，特别是直接采用用户名密码文件来进行安全认证，也是很少。 首先要说的是。。。Dovecot 不支持uid或gid取值为0的用户登录，也就是说不支持root登录，而且默认uid取值需要>=500。 可以通过查看Dovecot Wiki来了解详细，uid可以改变配置，但必须大于0，详细的我就不多说了。