Java - Sending Email using JavaMail API

The Java Mail API provides support for sending and receiving electronic mail messages. The API provides a plug-in architecture where vendor’s implementation for their own proprietary protocols can be dynamically discovered and used at the run time. Sun provides a reference implementation and its supports the following protocols namely,

§  Internet Mail Access Protocol (IMAP)

§  Simple Mail Transfer Protocol (SMTP)

§  Post Office Protocol 3(POP 3)

In this tip, let us see how to send mail using the Java Mail API. Following is the complete code listing for sending a mail from a Java Application,

For this you have to download java-mail-1.4.4.jar

package com.mohan.javaexamples;

import java.io.UnsupportedEncodingException;

import java.util.Date;

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 SendGMail {

            public static void sendMail(String from, String to, String sub, String text)

                                    throws UnsupportedEncodingException, MessagingException {

//using TLS

                        Properties propsTLS = new Properties();

                        propsTLS.put("mail.transport.protocol", "smtp");

                        propsTLS.put("mail.smtp.host", "smtp.gmail.com");

                        propsTLS.put("mail.smtp.auth", "true");

                        propsTLS.put("mail.smtp.starttls.enable", "true");

                        Session session = Session.getDefaultInstance(propsTLS,

                                                new javax.mail.Authenticator() {

                                                            protected PasswordAuthentication getPasswordAuthentication() {

                                                                        return new PasswordAuthentication(

                                                                                                "gmailUsername@gmail.com", "gmailPassword");// Specify the Username and the PassWord

                                                            }

                                                });

                        session.setDebug(true);

                        Message message = new MimeMessage(session);

                        message.setFrom(new InternetAddress("gmailUsername@gmail.com",

                                                "Username"));

                        message.setRecipients(Message.RecipientType.TO,

                                                InternetAddress.parse("gmailReciverUsername@gmail.com"));

message.setSubject("Test mail program  using TLS techniques ....!"); //specify subject

                        message.setText("good job mohan ! keep it up .."); //specify text/body

                         message.setSentDate(new Date());

                        Transport transport = session.getTransport();

                        transport.connect("smtp.gmail.com", 587, "gmailUsername@gmail.com",

                                                "gmailPassword");

                        Transport.send(message, message.getAllRecipients());

                        transport.close();

                        System.out.println("------------------------------------------------------------------------");

//using SSL

                        Properties propSSL = new Properties();

                        propsTLS.put("mail.transport.protocol", "smtps");

                        propSSL.put("mail.smtps.host", "smtp.infostretch.com");

                        propSSL.put("mail.smtp.socketFactory.class",

                                                "javax.net.ssl.SSLSocketFactory");

       propSSL.put("mail.smtp.socketFactory.fallback", "false");

                        propSSL.put("mail.smtps.auth", "true");

                        Session session2 = Session.getDefaultInstance(propSSL,

                                                new javax.mail.Authenticator() {

                                                            protected PasswordAuthentication getPasswordAuthentication() {

                                                                        return new PasswordAuthentication(

                                                                                                "gmailUsername@gmail.com", "gmailPassword");// Specify the Username and the PassWord

                                                            }

                                                });

                        session2.setDebug(true);

                        Message message2 = new MimeMessage(session2);

                        message2.setFrom(new InternetAddress("gmailUsername@gmail.com",

                                                "Username"));

                        message2.setRecipients(Message.RecipientType.TO,

                                                InternetAddress.parse("gmailReciverUsername@gmail.com"));

                        message2.setSubject("Test mail program  using SSL!"); //specify subject

                        message2.setText("good job mohan ! keep it up .."); //specify text/body

                        message2.setSentDate(new Date());

                        Transport transportSSl = session2.getTransport();

                        transportSSl.connect("smtp.gmail.com", 465,"gmailUsername@gmail.com", "gmailPassword");

                        Transport.send(message2, message2.getAllRecipients());

                        transportSSl.close();

            }

            public static void main(String[] args) throws UnsupportedEncodingException,

                                    MessagingException {

                        System.out.println("sending mail .........!");

                        sendMail(null, null, null, null);

            }

}