Java Send mail via gmail

In this post, I am going to explain how to send mail programmatically.

Login to your gmail and go to following link and Turn on secure apps.

https://www.google.com/settings/security/lesssecureapps

Following utility class send mail. Update the variables senderMailId, password, receiverMailId in MailUtil class.

import java.util.Properties;

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

public class MailUtil {

 private static final String senderMailId = "";
 private static final String password = "";
 private static String receiverMailId = "";
 private static Properties props = new Properties();

 static {
  loadProperties();
 }

 private static void loadProperties() {
  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");
 }

 public static boolean sendEmail(final String to, final String subject,
   final String body) {

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

  try {

   Message message = new MimeMessage(session);
   message.setFrom(new InternetAddress(senderMailId));
   message.setRecipients(Message.RecipientType.TO,
     InternetAddress.parse(to));
   message.setSubject(subject);
   message.setText(body);

   Transport.send(message);

   System.out.println("Message send to " + to);
   return true;

  }

  catch (MessagingException e) {
   System.out.println("Email sending failed " + e.getMessage());
   return false;
  }
 }

 public static boolean isValidEmailAddress(String email) {
  String ePattern = "^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\])|(([a-zA-Z\\-0-9]+\\.)+[a-zA-Z]{2,}))$";
  java.util.regex.Pattern p = java.util.regex.Pattern.compile(ePattern);
  java.util.regex.Matcher m = p.matcher(email);
  return m.matches();
 }

 public static void main(String args[]) {
  sendEmail(receiverMailId, "Hello", "Have a good day PTR");
 }
}