Send Mails Using JAVA MAIL API

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class Main {

 
    private static String RECIPIENT = "UserName1@gmail.com";

    public static void main(String[] args) {
        String from = "UserName1@gmail.com";
        String pass = "PassWord1";
        String[] to = { RECIPIENT }; // list of recipient email addresses
        String subject = "Java send mail example";
        String body = "Welcome to vijay java mail Api!";

        sendFromGMail(from, pass, to, subject, body);
    }

    private static void sendFromGMail(final String from, final String pass, String[] to, String subject, String body) {
        Properties props = System.getProperties();
        String host = "smtp.gmail.com";
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", host);
        //props.put("mail.smtp.user", from);
        //props.put("mail.smtp.password", pass);
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.auth", "true");
        props.put("smtp.EnableSsl", "true");
       
    

        Session session = Session.getInstance(props, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                // TODO Auto-generated method stub
                return new PasswordAuthentication("UserName@gmail.com", "Password");
            }
        });
       
        MimeMessage message = new MimeMessage(session);

        try {
            message.setFrom(new InternetAddress(from));
            InternetAddress[] toAddress = new InternetAddress[to.length];

            // To get the array of addresses
            for( int i = 0; i < to.length; i++ ) {
                toAddress[i] = new InternetAddress(to[i]);
            }

            for( int i = 0; i < toAddress.length; i++) {
                message.addRecipient(Message.RecipientType.TO, toAddress[i]);
            }

            message.setSubject(subject);
            message.setText(body);
            Transport transport = session.getTransport("smtp");
          
            transport.connect(host, from, pass);
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();
            System.out.println("Message delevered.");
        }
        catch (AddressException ae) {
            ae.printStackTrace();
        }
        catch (MessagingException me) {
            me.printStackTrace();
        }
    }
   
    public static Authenticator getAuthentication(final String userName, final String password){
        Authenticator authenticator = null;
        authenticator = new Authenticator() {
            private PasswordAuthentication passwordAuthentication = new PasswordAuthentication(userName, password);
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                // TODO Auto-generated method stub
                return passwordAuthentication;
            }
        };
       
         return authenticator;
    }
}