javax.mail.AuthenticationFailedException: 535 No SMTP server defined. Use real server address instead of 127.0.0.1 in your account.

I am trying to send mail using below program :- 

public class mail {

public static void main(String[] args) {

final String username = "****@gmail.com";
final String password = "****";

Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");

Session session = Session.getInstance(props,
 new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
 });

try {

Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("piyush.mundada89@gmail.com"));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse("piyush.mundada89@gmail.com"));
message.setSubject("Testing Subject");
message.setText("Dear Mail Crawler,"
+ "\n\n Hi" );

Transport.send(message);

System.out.println("Done");

} catch (MessagingException e) {
throw new RuntimeException(e);
}
}


But when I run this , I am getting below error

 javax.mail.AuthenticationFailedException: 535 No SMTP server defined. Use real server address instead of 127.0.0.1 in your account.

at com.sun.mail.smtp.SMTPTransport$Authenticator.authenticate(SMTPTransport.java:823)
at com.sun.mail.smtp.SMTPTransport.authenticate(SMTPTransport.java:756)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:673)
at javax.mail.Service.connect(Service.java:317)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:125)
at javax.mail.Transport.send0(Transport.java:194)
at javax.mail.Transport.send(Transport.java:124)
at mail.mail.main(mail_with_Attachment.java:68)

Please help me..........!