UChome2.0 邮箱验证失败

Discuz7.0 邮箱验证成功（新浪邮箱）

Uchome2.0 验证失败（新浪邮箱），邮件设置部分肯定没问题了，检查过N多次。
Uchome2.0更换QQ邮箱，依然不行。。。

请高手帮忙解答一下，困扰好久的问题了。 感谢

附上日志：

<?PHP exit;?>        2009-10-02 11:19:30                60.23.27.98        0        /kaixin/do.php?ac=sendmail&rand=1254453571        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-08 17:02:41                60.23.27.98        11        /kaixin/do.php?ac=sendmail&rand=1254992562        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 02:00:35                119.114.209.217        16        /kaixin/do.php?ac=sendmail&rand=1255197634        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 13:24:21                220.190.205.115        17        /kaixin/do.php?ac=sendmail&rand=1255238656        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 17:07:36                210.90.199.218        22        /kaixin/do.php?ac=sendmail&rand=1255252052        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 17:16:35                222.129.30.162        4        /kaixin/do.php?ac=sendmail&rand=1255252595        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 17:43:38                222.129.30.162        1        /kaixin/do.php?ac=sendmail&rand=1255254195        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 17:44:44                222.129.30.162        1        /kaixin/do.php?ac=sendmail&rand=1255254284        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 17:47:30                222.129.30.162        1        /kaixin/do.php?ac=sendmail&rand=1255254429        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 17:59:40                222.129.30.162        1        /kaixin/do.php?ac=sendmail&rand=1255255179        (smtp@sina.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 18:10:06                222.129.30.162        3        /kaixin/do.php?ac=sendmail&rand=1255255806        (smtp@qq.com:25) CONNECT - Unable to connect to the SMTP server
<?PHP exit;?>        2009-10-11 18:10:45                222.129.30.162        3        /kaixin/do.php?ac=sendmail&rand=1255255845        (smtp@qq.com:25) CONNECT - Unable to connect to the SMTP server

foxmail 可以不。

Unable to connect to the SMTP server
无法连接SMTP服务器，这个是专门用于发送邮件的

费解的是discuz 可以发邮件啊

如果是邮箱问题、设置问题、或者服务器问题 那discuz 也不能发啊……

等答案   哪位大侠指点一下

多谢