javamail报错问题?报错

[23889631@qtp-5450181-4 - /app/remoting/ConsultService] ERROR utils.mails.MailsServiceImpl - toAddress:[XXXXX@qq.com],fromAddress:user@126.com,send mail fail:
org.springframework.mail.MailSendException: Failed messages: javax.mail.MessagingException: Exception reading response;
  nested exception is:
java.net.SocketTimeoutException: Read timed out
at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:440) ~[spring-context-support-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:340) ~[spring-context-support-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:355) ~[spring-context-support-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:344) ~[spring-context-support-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at utils.mails.MailsServiceImpl.sendMimeMessage(MailsServiceImpl.java:108) ~[classes/:na]
at cn.com.service.Impl.ComplaintConsultServiceImpl.sendCompliaintConsultEmail(ComplaintConsultServiceImpl.java:143) [classes/:na]
at cn.com.service.Impl.ComplaintConsultServiceImpl.saveComplaintConsult(ComplaintConsultServiceImpl.java:50) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_23]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_23]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_23]
at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_23]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) [spring-aop-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) [spring-aop-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) [spring-aop-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.remoting.support.RemoteInvocationTraceInterceptor.invoke(RemoteInvocationTraceInterceptor.java:77) [spring-context-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) [spring-aop-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) [spring-aop-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at $Proxy55.saveComplaintConsult(Unknown Source) [na:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_23]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) ~[na:1.6.0_23]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_23]
at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_23]
at org.springframework.remoting.support.RemoteInvocation.invoke(RemoteInvocation.java:205) [spring-context-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.remoting.support.DefaultRemoteInvocationExecutor.invoke(DefaultRemoteInvocationExecutor.java:38) [spring-context-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.remoting.support.RemoteInvocationBasedExporter.invoke(RemoteInvocationBasedExporter.java:78) [spring-context-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.remoting.support.RemoteInvocationBasedExporter.invokeAndCreateResult(RemoteInvocationBasedExporter.java:114) [spring-context-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter.handleRequest(HttpInvokerServiceExporter.java:73) [spring-web-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter.handle(HttpRequestHandlerAdapter.java:49) [spring-webmvc-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790) [spring-webmvc-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) [spring-webmvc-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:669) [spring-webmvc-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:585) [spring-webmvc-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) [servlet-api-2.5-20081211.jar:na]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) [servlet-api-2.5-20081211.jar:na]
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221) [jetty-6.1.26.jar:6.1.26]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) [spring-web-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) [spring-web-3.0.6.RELEASE.jar:3.0.6.RELEASE]
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.Server.handle(Server.java:322) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) [jetty-6.1.26.jar:6.1.26]
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) [jetty-util-6.1.26.jar:6.1.26]
java.lang.Exception: send mail fail
at utils.mails.MailsServiceImpl.sendMimeMessage(MailsServiceImpl.java:112)
有时候报错，有时候正常，报错的时候邮件能收到，哪位大侠帮忙看看