linux主机安装discuz！x2 不能发送邮件

错误代码如下：      看了不少解决办法都不行   请官方人员给解决一下   ！！！

<?PHP exit;?> 2011-11-13 19:06:32  192.168.0.105        4       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 19:06:33  192.168.0.105        4       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 19:06:33  192.168.0.105        4       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 19:06:33  192.168.0.105        4       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 19:06:33  192.168.0.105        4       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 19:06:34  192.168.0.105        4       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 19:06:34  192.168.0.105        4       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 19:06:34  192.168.0.105        4       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 20:54:16  192.168.0.101        1       /hxdc/admin.php?action=checktools&operation=mailcheck&frame=no  (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 20:54:16  192.168.0.101        1       /hxdc/admin.php?action=checktools&operation=mailcheck&frame=no  (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 21:17:39  192.168.0.101        1       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 21:21:30  192.168.0.101        1       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 21:22:04  192.168.0.101        1       /hxdc/testmail.php      (smtp.163.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:14:44  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:25),13,Permission denied, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:15:31  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:25),13,Permission denied, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:16:23  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:0),Failed to parse address "smtp.163.com",, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:18:33  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:0),Failed to parse address "smtp.163.com",, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:21:03  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:25),13,Permission denied, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:23:26  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:25),13,Permission denied, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:25:16  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:25),13,Permission denied, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:34:31  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:25),13,Permission denied, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:40:22  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:25),13,Permission denied, CONNECT - Unable to connect to the SMTP server
<?PHP exit;?> 2011-11-13 23:40:37  192.168.0.101        9       /hxdc/testmail.php      (smtp.163.com:25),13,Permission denied, CONNECT - Unable to connect to the SMTP server

不能连接163的smtp?在主机内ping下163看能否解析正常，如不正常，设置DNS

qq的也不好使

在服务器上使用tenter 连接好使

哈哈  问题解决了   是selinux的事

∵· 发表于 2011-12-2 15:29
哈哈  问题解决了   是selinux的事

怎么回事？能详细讲一下么？