postfix + courierimap + squirrelMail 邮件服务器

Postfix+courier-imap:

  ubuntu下用postfix搭建邮件服务器

  http://blog.csdn.net/bird_wang/article/details/4225113

  PostfixBasicSetupHowto

  https://help.ubuntu.com/community/PostfixBasicSetupHowto

courier-imap +squirrelMail:

  在ubuntu下用squirrelmail架设webmail

  http://blog.csdn.net/bird_wang/article/details/4228222

  SquerrilMail介绍及安装配置

  http://blog.csdn.net/bird_wang/article/details/4228550

相关：

　使用mailx发送邮件

　http://www.cnblogs.com/softwaretesting/archive/2011/11/23/2260520.html

　mailx发送邮件

　http://blog.csdn.net/v_love/article/details/7762016

　Postfix 学习 -- Linux添加/删除用户和用户组

　http://blog.csdn.net/xueye3000/article/details/7547142

　以单独的用户和用户组运行Apache

　http://www.chinaz.com/web/2011/0728/202173_2.shtml

　Ubuntu下安装和配置Apache2

　http://www.blogjava.net/duanzhimin528/archive/2010/03/05/314564.html

常见问题：　

> "Bad sequence of commands - Server replied: 503 Error: authentication not enabled"

This is a mail server/SquirrelMail configuration problem.  SquirrelMail needs to 
be configured NOT to use authentication with connecting with the mail server or 
the mail server needs to have authentication enabled.