开发四年只会写业务代码，分布式高并发都不会还做程序员？->>> dockerfile创建ubuntu16.04,官网源 ubuntu安装完成，执行dockerfile后续命令。 到这一步， RUN apt-get install -y dovecot-imapd dovecot-pop3d postfix 终端dovecot安装完，postfix安装时出现选择项： Selecting ...

So, we have installed OTRS on a machine to use as a ticketing system, but it's sort of useless without being able to email back and forth. I installed the postfix package and can't tell whether or not ...