title: Jenkins test mail configuration error. java connection error
body: <p>when i configured <code>jenkins</code> mail java connection erro is displayed</p>
  
  <p>i'm using smtp@gmail.com serevr</p>
  
  <p>error :</p>
  
  <pre><code>java.net.ConnectException: Connection refused: connect
  
      at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
  
      at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
  
      at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
  
      at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
  
      at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
  
      at java.net.PlainSocketImpl.connect(Unknown Source)
  
      at java.net.SocksSocketImpl.connect(Unknown Source)
  
      at java.net.Socket.connect(Unknown Source)
  
      at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:286)
  
      at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:231)
  
      at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1900)
  
  Caused: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465;
    nested exception is:
      java.net.ConnectException: Connection refused: connect
  
      at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1934)
  
      at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:638)
  
      at javax.mail.Service.connect(Service.java:317)
  
      at javax.mail.Service.connect(Service.java:176)
  
      at javax.mail.Service.connect(Service.java:125)
  
      at javax.mail.Transport.send0(Transport.java:194)
  
      at javax.mail.Transport.send(Transport.java:124)
  
      at hudson.tasks.Mailer$DescriptorImpl.doSendTestMail(Mailer.java:591)
  
      at java.lang.invoke.MethodHandle.invokeWithArguments(Unknown Source)
  
      at org.kohsuke.stapler.Function$MethodFunction.invoke(Function.java:396)
  
      at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:408)
  
      at org.kohsuke.stapler.interceptor.RequirePOST$Processor.invoke(RequirePOST.java:77)
  
      at org.kohsuke.stapler.PreInvokeInterceptedFunction.invoke(PreInvokeInterceptedFunction.java:26)
  
      at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:212)
  
      at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:145)
  
      at org.kohsuke.stapler.MetaClass$11.doDispatch(MetaClass.java:537)
  
      at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
  
      at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:739)
  
      at org.kohsuke.stapler.Stapler.invoke(Stapler.java:870)
  
      at org.kohsuke.stapler.MetaClass$4.doDispatch(MetaClass.java:282)
  
      at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:58)
  
      at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:739)
  
      at org.kohsuke.stapler.Stapler.invoke(Stapler.java:870)
  
      at org.kohsuke.stapler.Stapler.invoke(Stapler.java:668)
  
      at org.kohsuke.stapler.Stapler.service(Stapler.java:238)
  
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
  
      at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:865)
  
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1655)
  
      at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:154)
  
      at jenkins.telemetry.impl.UserLanguages$AcceptLanguageFilter.doFilter(UserLanguages.java:128)
  
      at hudson.util.PluginServletFilter$1.doFilter(PluginServletFilter.java:151)
  
      at hudson.util.PluginServletFilter.doFilter(PluginServletFilter.java:157)
  
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
  
      at hudson.security.csrf.CrumbFilter.doFilter(CrumbFilter.java:99)
  
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
  
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:84)
  
      at hudson.security.UnwrapSecurityExceptionFilter.doFilter(UnwrapSecurityExceptionFilter.java:51)
  
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  
      at jenkins.security.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:117)
  
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  
      at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
  
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  
      at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
  
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  
      at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
  
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  
      at jenkins.security.BasicHeaderProcessor.doFilter(BasicHeaderProcessor.java:93)
  
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  
      at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
  
      at hudson.security.HttpSessionContextIntegrationFilter2.doFilter(HttpSessionContextIntegrationFilter2.java:67)
  
      at hudson.security.ChainedServletFilter$1.doFilter(ChainedServletFilter.java:87)
  
      at hudson.security.ChainedServletFilter.doFilter(ChainedServletFilter.java:90)
  
      at hudson.security.HudsonFilter.doFilter(HudsonFilter.java:171)
  
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
  
      at org.kohsuke.stapler.compression.CompressionFilter.doFilter(CompressionFilter.java:49)
  
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
  
      at hudson.util.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:82)
  
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
  
      at org.kohsuke.stapler.DiagnosticThreadNameFilter.doFilter(DiagnosticThreadNameFilter.java:30)
  
      at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1642)
  
      at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)
  
      at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
  
      at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
  
      at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
  
      at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
  
      at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
  
      at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
  
      at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1340)
  
      at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
  
      at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
  
      at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
  
      at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
  
      at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1242)
  
      at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
  
      at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
  
      at org.eclipse.jetty.server.Server.handle(Server.java:503)
  
      at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
  
      at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
  
      at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
  
      at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
  
      at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
  
      at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
  
      at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
  
      at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
  
      at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
  
      at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
  
      at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
  
      at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
  
      at java.lang.Thread.run(Unknown Source)
  </code></pre>