After a long search I came across this sample Java code for sending email into an SMTP server which required authentication and secure (TLS) connection. Hence I thought, I will re-publish it. I found this piece of code from Java developer forums.....I could not trace back the link... Thanks to good soul who published it. I thought of re-publishing it due its rarity.

I have used Java Mail 1.4.

------------------------------- Java code ---------------------------
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;

public class Main
{
String d_email = "ADDRESS@gmail.com",
d_password = "PASSWORD",
d_host = "smtp.gmail.com",
d_port = "465",
m_to = "EMAIL ADDRESS",
m_subject = "Testing",
m_text = "Hey, this is the testing email.";

public Main()
{
Properties props = new Properties();
props.put("mail.smtp.user", d_email);
props.put("mail.smtp.host", d_host);
props.put("mail.smtp.port", d_port);
props.put("mail.smtp.starttls.enable","true");
props.put("mail.smtp.auth", "true");
//props.put("mail.smtp.debug", "true");
props.put("mail.smtp.socketFactory.port", d_port);
props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.socketFactory.fallback", "false");

SecurityManager security = System.getSecurityManager();

try
{
Authenticator auth = new SMTPAuthenticator();
Session session = Session.getInstance(props, auth);
//session.setDebug(true);

MimeMessage msg = new MimeMessage(session);
msg.setText(m_text);
msg.setSubject(m_subject);
msg.setFrom(new InternetAddress(d_email));
msg.addRecipient(Message.RecipientType.TO, new InternetAddress(m_to));
Transport.send(msg);
}
catch (Exception mex)
{
mex.printStackTrace();
}
}

public static void main(String[] args)
{
Main blah = new Main();
}

private class SMTPAuthenticator extends javax.mail.Authenticator
{
public PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(d_email, d_password);
}
}
}