java邮件服务器的问题。jwebmail
去开源社区找邮件服务器，发现一个jwebmail。
        下载下来就开始用。。
结果报错：WebMail/Java   Server   v0.7.10   going   up...
=====================================

Initalizing...
-   Checking   Java   Virtual   Machine   ...  
    *   Version:   1.5.0_11   ...   ok.
    *   Operating   System:   Windows   XP/x86   5.1   ...   warning.   WebMail   was   only   tested
      on   Solaris,   HP-UX   and   Linux   and   may   cause   problems   on   your   platform.
    *   User   name:   Administrator   ...   ok.
    *   WebMail   System   Properties:   ok!
    *   Setting   DTD-path   in   webmail.xml   ...   done!
-   Configuration   Scheme   Handler   ...   done!
-   Default   Locale:   英文   (美国)
-   Default   Theme:   bibop
-   Initializing   WebMail   Authenticator   Plugins   ...
2007-7-30   14:05:59   org.apache.catalina.core.ApplicationContext   log
严重:   StandardWrapper.Throwable
java.lang.NoClassDefFoundError:   javax/mail/MessagingException
at   java.lang.Class.forName0(Native   Method)
at   java.lang.Class.forName(Class.java:164)
at   net.wastl.webmail.server.AuthenticatorHandler.registerAuthenticators(AuthenticatorHandler.java:71)
at   net.wastl.webmail.server.AuthenticatorHandler. <init> (AuthenticatorHandler.java:54)
at   net.wastl.webmail.server.WebMailServer.doInit(WebMailServer.java:156)
at   net.wastl.webmail.server.WebMailServlet.init(WebMailServlet.java:124)
at   org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1139)
at   org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:791)
at   org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:127)
at   org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at   org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at   org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at   org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at   org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at   org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at   org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at   org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at   org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at   org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at   java.lang.Thread.run(Thread.java:595)
2007-7-30   14:05:59   org.apache.catalina.core.StandardWrapperValve   invoke

运行环境：windows   xp，   tomcat   5.5   ,   jdk   1.5   不知道大家遇到过没有。
不知道能不能解决。。
大家给推荐下好用的邮件服务器（开源的）。。

------解决方案--------------------
java.lang.NoClassDefFoundError: javax/mail/MessagingException

需要将javamail的包设置到classpath
------解决方案--------------------
需要JMAIL的支持
找个JMAIL.JAR放到你的LIB下面