sendmail启动后出现的问题，希望哪位朋友指教
网络内部服务器的ip为192.168.0.249，安装的RHEL AS 3 U6，同时配置了named、vsftpd和sendmail，DNS和vsftpd都正常，就是sendmail配置完，只能在服务器上可以收发邮件，可是在客户端用outlook 就不行
提示如下：
您的服务器意外终止了连接。其可能原因包括服务器出错、网络出错或长时间处于非活动状态。 帐户: '192.168.0.249', 服务器: '192.168.0.249', 协议: POP3, 端口: 110, 安全(SSL): 否, 错误号: 0x800CCC0F
[root@server root]# host -t MX yjs.com
yjs.com mail is handled by 10 mail.yjs.com.
[root@server root]# host mail.yjs.com
mail.yjs.com has address 192.168.0.249
可以在服务上收发邮件：
[root@server root]# telnet mail.yjs.com 25
Trying 192.168.0.249...
telnet: Unable to connect to remote host: Connection refused
[root@server root]#
[root@server named]# netstat -tnl |grep :25
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
[root@server root]# telnet localhost 25
Trying 127.0.0.1...
Connected to server (127.0.0.1).
Escape character is '^]'.
220 localhost.localdomain ESMTP Sendmail 8.12.11/8.12.11; Mon, 1 Jan 2007 14:15:16 +0800
（这里的 localhost.localdomain 应该是内部域名mai.yjs.com才对吧？）
mail from:admin@yjs.com
250 2.1.0 admin@yjs.com... Sender ok
rcpt to:redhat@yjs.com
250 2.1.5 redhat@yjs.com... Recipient ok
data
354 Enter mail, end with "." on a line by itself
hello.
quit
[root@server root]# tail /var/log/maillog
Jan 1 13:56:28 server ipop3d[3905]: Mailbox vulnerable - directory /var/spool/mail must have 1777 protection
Jan 1 13:56:38 server ipop3d[3905]: Login user=admin host=[192.168.0.200] nmsgs=1/1
Jan 1 13:56:39 server ipop3d[3905]: Mailbox vulnerable - directory /var/spool/mail must have 1777 protection
Jan 1 13:56:39 server ipop3d[3905]: Logout user=admin host=[192.168.0.200] nmsgs=0 ndele=1
Jan 1 14:14:45 server sendmail[4115]: l016EUl0004115: Authentication-Warning: localhost.localdomain: server [127.0.0.1] didn't use HELO protocol
Jan 1 14:14:55 server sendmail[4115]: l016EUl0004115: Syntax error in parameters scanning "to;admin@yjs.com"
Jan 1 14:15:14 server sendmail[4115]: l016EUl0004115: from=redhat@yjs.com, size=0, class=0, nrcpts=0, proto=SMTP, daemon=MTA, relay=server [127.0.0.1]
Jan 1 14:15:35 server sendmail[4117]: l016FGHM004117: Authentication-Warning: localhost.localdomain: server [127.0.0.1] didn't use HELO protocol
Jan 1 14:16:47 server sendmail[4117]: l016FGHM004117: from=admin@yjs.com, size=25, class=0, nrcpts=1, msgid=<200701010615.l016FGHM004117@localhost.localdomain>, proto=SMTP, daemon=MTA, relay=server [127.0.0.1]
Jan 1 14:16:47 server sendmail[4118]: l016FGHM004117: to=redhat@yjs.com, ctladdr=admin@yjs.com (530/534), delay=00:01:00, xdelay=00:00:00, mailer=local, pri=30422, dsn=2.0.0, stat=Sent
[root@server root]#
用户查看自己收到的邮件：
[root@server root]# su - redhat
[redhat@server redhat]$ mail
Mail version 8.1 6/6/93. Type ? for help.
"/var/spool/mail/redhat": 1 message 1 new
>N 1 admin@yjs.com Mon Jan 1 14:16 19/482
&
Message 1:
From admin@yjs.com Mon Jan 1 14:16:47 2007
Date: Mon, 1 Jan 2007 14:15:16 +0800
From: admin@yjs.com
X-Authentication-Warning: localhost.localdomain: server [127.0.0.1] didn't use HELO protocol
hello.
&
named和sendmail都已经启动了：
[root@server named]# ps aux |grep named
named 3749 0.0 0.5 36292 3048 ? S 13:50 0:00 /usr/sbin/named -u named
root 4256 0.0 0.1 4936 680 pts/0 S 14:47 0:00 grep named
[root@server named]# ps aux |grep sendmail
root 3818 0.0 0.4 6104 2496 ? S 13:50 0:00 sendmail: accepting connections
smmsp 3827 0.0 0.4 5992 2196 ? S 13:50 0:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue
root 4258 0.0 0.1 4932 680 pts/0 S 14:47 0:00 grep sendmail
这个问题困扰的实在是搞不明白了，请朋友们帮帮我，十分感谢。
