Java Program to Send Mail with an Attachment

import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
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.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;


public class  JavaMailWithImageAttachment {

    static Properties mailServerProperties;
    static Session getMailSession;
    static MimeMessage msg;

    public static void main(String args[]) throws AddressException, MessagingException {

        System.out.println("\n1st ===> setup Mail Server Properties..");

        final String sourceEmail = "sivasankarmsccs@gmail.com"; // requires valid Gmail id
        final String password = "----------------------"; // correct password for Gmail id
        final String toEmail = "sivasankarmsccs@gmail.com"; // any destination email id

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

     
        Authenticator authentication = new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(sourceEmail, password);
            }
        };
        Session session = Session.getInstance(props, authentication);
        generateAndSendEmail(
                session,
                toEmail,
                "JavaMail API example with Image Attachment",
                "Greetings, <br><br>Test email from sagan. Please find the attachment."
                        + "<br><br> Regards, <br>Shiva Sagan");

    }

    public static void generateAndSendEmail(Session session, String toEmail, String subject,
            String body) {
        try {
            System.out.println("\n3rd ===> generateAndSendEmail() starts..");

            MimeMessage msg = new MimeMessage(session);
            msg.addHeader("Content-type", "text/HTML; charset=UTF-8");
            msg.addHeader("format", "flowed");
            msg.addHeader("Content-Transfer-Encoding", "8bit");

            msg.setFrom(new InternetAddress("sivasankarmsccs@gmail.com",
                    "NoReply"));
            msg.setReplyTo(InternetAddress.parse("sthalavai@apptivo.co.in", false));
            msg.setSubject(subject, "UTF-8");
            msg.setSentDate(new Date());
            msg.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse(toEmail, false));

            // Create the message body part
            BodyPart messageBodyPart = new MimeBodyPart();
            messageBodyPart.setContent(body, "text/html");

            // Create a multipart message for attachment
            Multipart multipart = new MimeMultipart();

            // Set text message part
            multipart.addBodyPart(messageBodyPart);

            messageBodyPart = new MimeBodyPart();

            // Valid file location
            String filename = "wall.jpg";
            DataSource source = new FileDataSource(filename);
            messageBodyPart.setDataHandler(new DataHandler(source));
            messageBodyPart.setFileName(filename);
            // Trick is to add the content-id header here
            messageBodyPart.setHeader("Content-ID", "image_id");
            multipart.addBodyPart(messageBodyPart);

            System.out.println("\n4th ===> third part for displaying image in the email body..");
            messageBodyPart = new MimeBodyPart();
            messageBodyPart.setContent("<br><h3>Attachments : </h3>"
                    + "<img src='cid:image_id'>", "text/html");
            multipart.addBodyPart(messageBodyPart);
            msg.setContent(multipart);

            System.out.println("\n5th ===> Finally Send message..");

            // Finally Send message
            Transport.send(msg);

            System.out
                    .println("\n6th ===> Email Sent Successfully With Image Attachment. Check your email now..");
            System.out.println("\n7th ===> generateAndSendEmail() ends..");

        } catch (MessagingException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}



Output: