Sending JavaMail Through A Particular Gateway Or Firewall

Question

Sending Java Mail through a particular Gateway or Firewall. I am having the problem while sending mail through Java Mail. This is the code being used for sending mail.
Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
          Properties props = new Properties();
          String timeOutVal="50000";
          props.setProperty("mail.transport.protocol","smtp");
          props.setProperty("mail.host","smtp.gmail.com");
          props.put("mail.smtp.auth","true");//we will use the smtp authentication
          props.put("mail.smtp.port","465");
          props.put("mail.smtp.socketFactory.port","465");
          props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
          props.put("mail.smtp.socketFactory.fallback","false");
          props.put("mail.smtp.quitwait","false");
          props.put("mail.smtp.connectiontimeout",timeOutVal);
          props.put("mail.smtp.timeout",timeOutVal);
          final String emailId ="[email protected]";
          final String password ="test123";
          if(emailId != null && password != null){
               Session session = Session.getDefaultInstance(props,new javax.mail.Authenticator(){
                    protected PasswordAuthentication getPasswordAuthentication(){
                         return new PasswordAuthentication(emailId.trim(),password.trim());
                    MimeMessage message = new MimeMessage(session);
                    message.setSender(new InternetAddress(emailId.trim()));
                    if(subject != null){
                         message.setSubject(subject.trim());
                    }else{
                         message.setSubject("");
                    //message.setContent("text","text/plain");
                    message.setContent(msg,"text/plain");
                    String recipients = emailIds.trim();
                    message.setRecipients(Message.RecipientType.TO,InternetAddress.parse(recipients));
                    Transport.send(message);
                    return 0;
          }else{
               return 1;
          }After the Applications sends the mail the following error displays in the console log.
     14:39:59,090 INFO  [STDOUT] javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 465;
       nested exception is:
        java.net.SocketTimeoutException: connect timed out
     14:39:59,090 INFO  [STDOUT]     at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:911)
     14:39:59,090 INFO  [STDOUT]     at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:158)
     14:39:59,090 INFO  [STDOUT]     at javax.mail.Service.connect(Service.java:310)
     14:39:59,090 INFO  [STDOUT]     at javax.mail.Service.connect(Service.java:169)
     14:39:59,090 INFO  [STDOUT]     at javax.mail.Service.connect(Service.java:118)
     14:39:59,090 INFO  [STDOUT]     at com.sun.mail.smtp.SMTPTransport.connect(SMTPTransport.java:95)
     14:39:59,090 INFO  [STDOUT]     at javax.mail.Transport.send0(Transport.java:188)
     14:39:59,090 INFO  [STDOUT]     at javax.mail.Transport.send(Transport.java:118)          Troubleshooting Done
     Added Firewall ip in the Gateway List, and removed other gateway.
     Then it works.But it blocks other remote servers from accessing the local server.
     as the other gateway is being removed from the local server.
     Please help me to solve the issue.
Thanks and Regards
Rasa.

Answer 1

Your configuration code is unnecessarily complex. Please read the JavaMail FAQ for the simpler way
to configure access to Gmail.
Also, the JavaMail FAQ has tips for debugging connection problems.
If you're having trouble configuring your gateway, talk to your network administrator.