用CI框架写发送邮件程序，为什么会报错呢？

A PHP Error was encountered

Severity: Warning

Message: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set()

Filename: libraries/Email.php

Line Number: 1540
Unable to send email using PHP mail(). Your server might not be configured to send mail using this method.

你本机不是邮件服务器 你可以修改php.ini 对应其它的邮件服务器
推荐用 phpmailer