请教-安装sendmail用于VBB论坛收发信

newuser

请问哪里有傻瓜化点的sendmail安装配置方法，只要vbulletin能收发信件就行
我用论坛诊断功能发信测试得到如下错误，应该是sendmail没安装：

SMTP: localhost
sendmail_from: None
sendmail_path: /usr/sbin/sendmail -t -i

Results  
The mailing function returned an error while trying to send the mail.
Check your mail server to ensure it is configured correctly to allow PHP to send mail from it. You should also check your mail server's error log for more diagnostic information.

vps没有/usr/sbin/sendmail这个文件或目录