JavaMail and Gmail

[Khushbu Arora]

Hi!

The program of JavaMail to send email by using gmail SMTP server was working correctly in Windows 7. When I tested the program in Windows XP in a different machine, then the email is not going. Either Messaging or SendMail exception comes. I have used JDK1.6 and NetBeans 5.5 in both the machines.

Kindly let me know whether the problem is because of change of OS (in which case some changes in coding may be needed) or some setting needs to be done in NetBeans, which was taken automatically in Windows 7.

The code is=

package utility;

import java.io.Console;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
import java.util.*;

public class SendMail {

         String username=null;
         String password=null;

        /** Creates a new instance of SendMail */
        public SendMail() {
        }

        public void postMail( String recipients[ ], String subject, String message, String from, String pwd) throws MessagingException
        {
                 boolean debug = false;

                 //Set the host smtp address
                 Properties props = new Properties();

                 //props.put("mail.smtp.host", "smtp.live.com");

                 String host="smtp.gmail.com";
                 props.put("mail.smtps.auth", "true");

                 // Authenticator a1= new PopupAuthenticator();

                 // create some properties and get the default Session
                 Session session = Session.getDefaultInstance(props, null);
                 session.setDebug(debug);

                 // create a message
                 Message msg = new MimeMessage(session);

                // set the from and to address
                //InternetAddress addressFrom = new InternetAddress(from);
                //msg.setFrom(addressFrom);

                InternetAddress[] addressTo = new InternetAddress[recipients.length]; 
                for (int i = 0; i < recipients.length; i++)
                {
                         addressTo[i] = new InternetAddress(recipients[i]);
                }
                msg.setRecipients(Message.RecipientType.TO, addressTo);

                // Setting the Subject and Content Type
                msg.setSubject(subject);
                msg.setContent(message, "text/plain");

               //msg.setText(message);
               //Transport.send(msg); 

               username = from;
               password = pwd; 

               Transport t = session.getTransport("smtps");
               try {
                           t.connect(host, username, password);
                           //t.connect(host, username);
                           t.sendMessage(msg, msg.getAllRecipients());
               } 
               catch(Exception ex){
                           out.println(ex);
              }
               finally {
                           t.close();
               }

        }

} 

[Rob Spoor]

Please UseCodeTags. You can use the edit button to add them.

[David Newton]

And correct the indentation.

Also, please see ItDoesntWorkIsUseless: what's actually happening? Are the same ports open on both machines? Are the machine's firewall/etc. settings the same?

[Khushbu Arora]

I'm getting MessagingException and SendFailedException. How to check for the opened ports in Windows? In Windows XP, I have disabled firewall but its enabled with few settings in Windows 7. In spite of the fact that firewall is enabled in Win 7, there are no issues with the program. On the contrary, disabling the firewall in Windows XP didn't solve my problem.

I think the issue is with the ports only. Can you please help me in finding out the closed ports in Win? For gmail smtp server (since I'm sending and receiving messages in gmail only through my application), what should be the port number to be checked?

[Ulf Dittmer]

It would help if you posted the complete error messages with their respective stack traces.

[Rob Spoor]

Have you already read How do I access Gmail with JavaMail?

[Khushbu Arora]

Following exception is generated:

javax.mail.MessagingException: can't determine local email address




Yes, I've already gone through that text but the code which I wrote is already working in one machine with Win 7. So, I think the issue should not be with the code only.

[Mark E Hansen]

Khushbu Arora wrote:Following exception is generated:

javax.mail.MessagingException: can't determine local email address




Yes, I've already gone through that text but the code which I wrote is already working in one machine with Win 7. So, I think the issue should not be with the code only.

That, Sir, is a very dangerous assumption. Just because some code works in one environment doesn't mean the code is correct. If you close yourself off to possibilities which other, possibly more experienced developers are pointing out to you, you run the risk of never solving your problem.