包里有安装文档的，其实就是把包解压缩到原来Extmail的位置，然后修改一下配置文件webmail.cf
==================================================================
Config extmail
==============
1)Restart apache, and try to access
http://mail.example.com/, your browser
will be redirected to /extmail/cgi/index.cgi if everything works fine.
2)Configure /var/www/extsuite/extmail/webmail.cf
copy the webmail.cf.default as webmail.cf, then edit webmail.cf
Change SYS_AUTH_TYPE to your favorite type, ldap or mysql, and fill out
SYS_MYSQL_* parameters if you chose mysql, the same as ldap.
Please read webmail.cf for parameters explanation in detail.
3)Try to login with your existing account and password.
==================================================================
只是好像1.04的mysql的用户名、密码配置不是在这个文件里面，所以照抄1.04的配置文件可能会出错，如果忘记原来mysql的用户名密码的话重新建一个好了：）
