Problem with Java Mail Program

Question

Hi Everyone...
Please help me to sort out this problem...
I am getting this Exception while executing the code pasted below...
javax.mail.AuthenticationFailedException
at javax.mail.Service.connect(Service.java:306)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at javax.mail.Transport.send0(Transport.java:168)
at javax.mail.Transport.send(Transport.java:98)
at JDCSend.main(JDCSend.java:38)
It's just a simple java program to send an email using JavaMail API
import java.io.*;
import java.util.*;
import javax.mail.*;
import javax.mail.event.*;
import javax.mail.internet.*;
import java.util.Properties;
public class JDCSend {
       public static void main (String args[]) {
          try{
              String from = "[email protected]";
              String to = "[email protected]";
               String host = "smtp.yahoo.com";
    // Get system properties
              Properties props = System.getProperties();
               props.put("mail.smtp.host", host);
               props.put("mail.smtp.port", 465);
               props.put("mail.smtp.auth", "true");
               props.put("mail.smtp.starttls.enable","true");
    // Get session
              Session session = Session.getDefaultInstance(props, null);
    // Define message
              MimeMessage message = new MimeMessage(session);
              message.setFrom(new InternetAddress(from));
              message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
              message.setSubject("Hello, JDC");
              message.setText("Welcome to the JDC");
    // Send message
              Transport.send(message);
          catch(Exception e){ e.printStackTrace(); }
}

Answer 1

You need to be identified by stmp server :
// Send message with authentication!
Transport tr = session.getTransport("smtp");
tr.connect(MailHost, user, pass);
message.saveChanges(); // don't forget this
tr.sendMessage(message, message.getAllRecipients());
tr.close();
Read JavaMail Faq please!