Sendmail 不能发信！

jiasm

从本机telnet:
[root@localhost root]# telnet localhost 25            
Trying 127.0.0.1...
Connected to localhost.localdomain (127.0.0.1).
Escape character is '^]'.
220 localhost.localdomain ESMTP Sendmail 8.12.8/8.12.8;
Tue, 1 Jul 2003 18:07:53 +0800
..................
quit
221 2.0.0 localhost.localdomain closing connection
Connection closed by foreign host.

然后从本机发信：
[root@localhost root]# mail jiasm@yeah.net
Subject: test
test
Cc:
[root@localhost root]# Who are you?: Permission denied

[root@localhost root]#
大家帮忙看看！急呀