Sending Mails using java

using javax.mail package

//Main.java

import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;



public class Main
{
   public static void main(String[] az) throws Exception
          {
    String  d_email = "yourgmailid@gmail.com",
            d_password = "your password",
            d_host = "smtp.gmail.com",
            d_port  = "465";
    String  m_to = "paruchuri.vigneswara@gmail.com";
    String  m_subject ="hi";
    String  m_text = "hello";
     
        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();
 
        Authenticator auth = new SMTPAuthenticator(d_email,d_password);
            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));
            System.out.println("hi");
            Transport.send(msg);
            System.out.println("hi");
        }
 
   
}


SMPTAuthenticator.java

 import javax.mail.*;
 public class SMTPAuthenticator extends javax.mail.Authenticator
    {
        String d_email;
    String d_password;
    SMTPAuthenticator(String u,String p){
    d_email=u;
    d_password=p;
    }
        public PasswordAuthentication getPasswordAuthentication()
        {
            return new PasswordAuthentication(d_email,d_password);
        }
    }