Problem faced in using the Java Mail Api

i tried to use exactly the same steps for using Java Mail Api as defined

Sun Site for Implementing Java Mail

This is the code that i have written for this

private String mailhost = "smtp.gmail.com";
        private String username = "abc";
        private String password = "xxxxxxx";
        Properties props = new Properties();
        props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.host", mailhost);
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
        Session session = Session.getInstance(props,null);
        MimeMessage message = new MimeMessage(session);
        message.setSubject("hi there");
        message.setText("Hi There, testing using Java Mail..!!!");
        Address address = new InternetAddress("abc@gmail.com", "abc");
        message.setFrom(address);
        Address toAddress = new InternetAddress("abc@gmail.com");
        message.addRecipient(Message.RecipientType.TO, toAddress);
        message.saveChanges();
        Transport transport = session.getTransport("smtp");
        transport.connect(mailhost,username,password);
        transport.sendMessage(message,message.getAllRecipients());
        transport.close();

but some days back i tried using the java mail api using another code which is without any authentication checks or giving the user name and password, it worked. but this does not seem to work. can somebody please help me out here.
[ February 17, 2008: Message edited by: Rakesh Shah ]

All kinds of things could go wrong when trying to send email. Turn on JavaMail debugging by calling "session.setDebug(true)". That will print all kinds of info to standard out from which you should be able to figure out what's going wrong.

i did turn on the debug mode and the java code run gets stuck here.
i mean it doesnt move forward from this point on
here is the log for that

That port on that server is open for business. Could this be a firewall issue that blocks this port somewhere along the line?

If you let the code run longer it should eventually time out and provide a more detailed error message.

hi Ulf, i kept it for some more time and this exception came up.

DEBUG: setDebug: JavaMail version 1.4.1
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 465, isSSL false
DEBUG SMTP: exception reading response: java.net.SocketException: Connection reset
Exception in thread "main" javax.mail.MessagingException: Exception reading response;
  nested exception is:
        java.net.SocketException: Connection reset
        at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1611)
        at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1369)
        at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)
        at javax.mail.Service.connect(Service.java:288)
        at javax.mail.Service.connect(Service.java:169)
        at javaapplication2.Trial.send(Trial.java:42)
        at javaapplication2.Trial.main(Trial.java:49)
Caused by: java.net.SocketException: Connection reset
        at java.net.SocketInputStream.read(SocketInputStream.java:168)
        at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:110)
        at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
        at java.io.BufferedInputStream.read(BufferedInputStream.java:235)
        at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:88)
        at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1589)
        ... 6 more
Java Result: 1

Can you telnet into that port, in other words, reach it at all?