Send HTML content in email using JavaMail API

import java.util.*;  
import javax.mail.*;  
import javax.mail.internet.*;  
/**
 * This class is used to send email with HTML content.
 * @author w3spoint
 */
public class SendEmailWithHTML { 
 final String senderEmailId = "[email protected]";
 final String senderPassword = "****";
 final String emailSMTPserver = "smtpout.secureserver.net";
 
public SendEmailWithHTML(String receiverEmail, 
		String subject, String htmlContent, 
		String contentType) {		
	Properties props = new Properties();
	props.put("mail.smtp.auth", "true");
	props.put("mail.smtp.host", emailSMTPserver);
 
  try { 			
	Authenticator auth = new SMTPAuthenticator();
        Session session = Session.getInstance(props, auth);
	Message message = new MimeMessage(session);
	message.setFrom(new InternetAddress(senderEmailId));
	message.setRecipients(Message.RecipientType.TO, 
			InternetAddress.parse(receiverEmail));
	message.setSubject(subject);
	message.setContent(htmlContent, contentType);
 
	Transport.send(message); 
	System.out.println("Email send successfully."); 
  } catch (Exception e) {
	e.printStackTrace();
    System.err.println("Error in sending email.");
  }
}
 
private class SMTPAuthenticator extends 
  javax.mail.Authenticator {
    public PasswordAuthentication 
      getPasswordAuthentication() {
        return new PasswordAuthentication(senderEmailId, 
        		senderPassword);
    }
}
 
public static void main(String[] args) {
	new SendEmailWithHTML ("[email protected]", "Test Email", 
	 "<h1>This is a html content test email.</h1>", "text/html");
}
}

Email send successfully.