The mail notifier causes Exception [user james as MailServer]

it's my configurations:
-------------------------------------------------------------
plexus.xml
...........
<resource>
<name>mail/Session</name>
<type>javax.mail.Session</type>
<properties>
<property>
<name>mail.smtp.host</name>
<value>qtx.cn</value>
</property>
<property>
<name>mail.smtp.port</name>
<value>25</value>
</property>

<!-- account -->
<property>
<name>mail.smtp.auth</name>
<value>true</value>
</property>
<property>
<name>mail.smtp.user</name>
<value>qtx@qtx.cn</value>
</property>
<property>
<name>password</name>
<value>1111111</value>
</property>
<property>
<name>mail.smtp.debug</name>
<value>true</value>
</property>
<property>
<name>mail.smtp.starttls.enable</name>
<value>true</value>
</property>
<property>
<name>mail.smtp.socketFactory.class</name>
<value>javax.net.ssl.SSLSocketFactory</value>
</property>
</properties>
</resource>
---------------------------------------------------------------------------------
pom.xml:
<ciManagement>
<system>Continuum</system>
<url>http://localhost:8080/continuum</url>
<notifiers>
<notifier>
<type>mail</type>
<address>tianxiang@qtx.cn</address>
</notifier>

<notifier>
<type>mail</type>
<address>qtx@qtx.cn</address>
</notifier>
</notifiers>
</ciManagement>

The Exception logged in continuum log file :
--------------------------------------------------------------------------------
org.codehaus.plexus.notification.NotificationException: Exception while sending message.
at org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendMessage(MailContinuumNotifier.java:566)
at org.apache.maven.continuum.notification.mail.MailContinuumNotifier.buildComplete(MailContinuumNotifier.java:387)
at org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendNotification(MailContinuumNotifier.java:254)
at org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDis
at org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDis
at org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.buildComplete(DefaultContinuumNotificationDispat
at org.apache.maven.continuum.buildcontroller.DefaultBuildController.endBuild(DefaultBuildController.java:221)
at org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:175)
at org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:50)
at org.codehaus.plexus.taskqueue.execution.ThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ThreadedTaskQueueExecutor.java:116)
at edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
at edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:176)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.codehaus.plexus.mailsender.MailSenderException: Error while sending the message.
at org.codehaus.plexus.mailsender.javamail.AbstractJavamailMailSender.send(AbstractJavamailMailSender.java:226)
at org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendMessage(MailContinuumNotifier.java:562)
... 14 more
Caused by: javax.mail.MessagingException: Exception reading response;
nested exception is:
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1462)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1260)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
at javax.mail.Service.connect(Service.java:275)
at org.codehaus.plexus.mailsender.javamail.AbstractJavamailMailSender.send(AbstractJavamailMailSender.java:212)
... 15 more
Caused by: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
at com.sun.net.ssl.internal.ssl.InputRecord.handleUnknownRecord(InputRecord.java:523)
at com.sun.net.ssl.internal.ssl.InputRecord.read(InputRecord.java:355)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:789)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1096)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:744)
at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75)
at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:97)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:75)
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1440)
... 19 more
2008-04-04 17:57:20,671 [pool-1-thread-1] INFO org.codehaus.plexus.notification.notifier.Notifier:mail - Message Subject: '[continuum]
2008-04-04 17:57:20,671 [pool-1-thread-1] INFO org.codehaus.plexus.notification.notifier.Notifier:mail - Sending message: From '"Conti
2008-04-04 17:57:20,671 [pool-1-thread-1] INFO org.codehaus.plexus.notification.notifier.Notifier:mail - Recipient: To '<qtx@qtx.cn>'.
DEBUG: setDebug: JavaMail version 1.4ea
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "qtx.cn", port 25, isSSL false
DEBUG SMTP: exception reading response: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
2008-04-04 17:57:20,687 [pool-1-thread-1] ERROR org.apache.maven.continuum.notification.ContinuumNotificationDispatcher:default - Error
org.codehaus.plexus.notification.NotificationException: Exception while sending message.
at org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendMessage(MailContinuumNotifier.java:566)
at org.apache.maven.continuum.notification.mail.MailContinuumNotifier.buildComplete(MailContinuumNotifier.java:387)
at org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendNotification(MailContinuumNotifier.java:254)
at org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDis
at org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.sendNotification(DefaultContinuumNotificationDis
at org.apache.maven.continuum.notification.DefaultContinuumNotificationDispatcher.buildComplete(DefaultContinuumNotificationDispat
at org.apache.maven.continuum.buildcontroller.DefaultBuildController.endBuild(DefaultBuildController.java:221)
at org.apache.maven.continuum.buildcontroller.DefaultBuildController.build(DefaultBuildController.java:175)
at org.apache.maven.continuum.buildcontroller.BuildProjectTaskExecutor.executeTask(BuildProjectTaskExecutor.java:50)
at org.codehaus.plexus.taskqueue.execution.ThreadedTaskQueueExecutor$ExecutorRunnable$1.run(ThreadedTaskQueueExecutor.java:116)
at edu.emory.mathcs.backport.java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
at edu.emory.mathcs.backport.java.util.concurrent.FutureTask.run(FutureTask.java:176)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665)
at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.codehaus.plexus.mailsender.MailSenderException: Error while sending the message.
at org.codehaus.plexus.mailsender.javamail.AbstractJavamailMailSender.send(AbstractJavamailMailSender.java:226)
at org.apache.maven.continuum.notification.mail.MailContinuumNotifier.sendMessage(MailContinuumNotifier.java:562)
... 14 more
Caused by: javax.mail.MessagingException: Exception reading response;
nested exception is:
javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1462)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1260)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
at javax.mail.Service.connect(Service.java:275)
at org.codehaus.plexus.mailsender.javamail.AbstractJavamailMailSender.send(AbstractJavamailMailSender.java:212)
... 15 more
Caused by: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?
at com.sun.net.ssl.internal.ssl.InputRecord.handleUnknownRecord(InputRecord.java:523)
at com.sun.net.ssl.internal.ssl.InputRecord.read(InputRecord.java:355)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:789)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1096)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:744)
at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75)
at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:97)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
at java.io.BufferedInputStream.read(BufferedInputStream.java:237)
at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:75)
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1440)
... 19 more

Thanks!