HDC调试需求开发（15万预算）,能者速来！>>>
翻阅了N篇搭建教程，最后感觉烂泥的写的较详细，于是按照
http://www.ilanni.com/?s=postfix的做法一步一步的实验
但是最后仍然出现一堆问题
telnet mailserver 25可以登录，telnet mailserver 110，telnet mailserver 143都提示出错
systemctl status postfix
systemctl status dovecot
都显示
postfix/proxymap: error: unsupported dictionary type: mysql

telenet server.example.com 110之后，dovecot显示
dovecot: auth: Fatal: Unknown database driver 'mysql'
dovecot: master: Error: service(auth): command startup failed, throttling for 2 secs