fetchmail收邮件的时候出了点小问题，帮忙看一下错误

zhenli1981

[root@localhost root]# fetchmail -u zhenli -p pop3 -a mars.swjtu.edu.cn
Enter password for zhenli@mars.swjtu.edu.cn:
1 message for zhenli at mars.swjtu.edu.cn (628 octets).
reading message zhenli@mars.swjtu.edu.cn:1 of 1 (628 octets) fetchmail: SMTP connect to localhost failed
fetchmail: SMTP transaction error while fetching from mars.swjtu.edu.cn
fetchmail: Query status=10 (SMTP)
为什么SMTP连接本地失败呢？