log4j配置e-mail有关问题。答出马上给分

log4j配置e-mail问题。在线等，答出马上给分！
我在工程的lib目录下发入了log4j.jar   /   activation.jar   /   mail.jar

以下是我log4j.xml的配置文件,放在工程的classes目录下:

<?xml   version= "1.0 "   encoding= "UTF-8 "   ?>
<!DOCTYPE   configuration>

<configuration   xmlns= "http://jakarta.apache.org/log4j/ ">

<appender   name= "MAIL_LOG "   class= "org.apache.log4j.net.SMTPAppender ">
<param   name= "BufferSize "   value= "1 "/>
<param   name= "SMTPHost "   value= "smtp.163.com "/>
<param   name= "From "   value= "test@163.com "/>
<param   name= "To "   value= "test@163.com "/>
<param   name= "Subject "   value= "Tools   Application   message "/>

<layout   class= "org.apache.log4j.PatternLayout ">
<param   name= "ConversionPattern "   value= "%d   %-5p   [%t]   %l   -   %m%n "/>
</layout>

<filter   class= "org.apache.log4j.varia.LevelRangeFilter ">
<param   name= "LevelMin "   value= "DEBUG "/>
<param   name= "LevelMax "   value= "ERROR "/>
</filter>
</appender>


<root>
<level   value= "ALL "/>
<appender-ref   ref= "MAIL_LOG "/>
</root>

</configuration>

问题是：为什么我的邮箱收不到邮件阿？是配置有问题吗？


------解决方案--------------------
smtp要邮箱密码

------解决方案--------------------
ding...
------解决方案--------------------
看网上说是要将javamail的类进行改造，加入邮箱代理部分就可以了。
自己搜一下。。。