JAVA: Send email from JAVA? Can OR Not?

* Warning: Technical Entry


Salam and good day,

We meet again in another Technical topic. This time it's about JAVA Mail. In this tutorial, we'll use javamail api. Cut the crap now and get ready.

Pre-requisites:

• javamail-1.4.3.zip - We may need only mail.jar
• A simple project (I Used MVC)

Step-by-step guide:
0. Import the required library onto your project folder. (Use of IDE also can ma: Right click, import libraries, yada yada yada, you know the drill)

1. Create your function that send mail from your service more-or-less like this.

      //Declare this on class header  

   private static final String SMTP_AUTH_USER = "someemailaccount";

   private static final String SMTP_AUTH_PWD = "someemailpassword";

   

   public void postMail(String[] recipients, String subject, String message, 

                         String from, String portalUserName, 

                         String feedbackType) throws MessagingException {

        logger.info("Inside postMail");

        boolean debug = false;

        //Set the host smtp address

        Properties props = new 

        props.put("mail.smtp.host", "email.test.gov.

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

        Authenticator auth = new SMTPAuthenticator();

        // create some properties and get the default Session

        Session session = Session.getInstance(props, auth);

        session.setDebug(debug);

        // create a message

        Message msg = new MimeMessage(session);

        // set the from and to address

        InternetAddress addressFrom = new InternetAddress(from);

        msg.setFrom(addressFrom);

        InternetAddress[] addressTo = new InternetAddress[recipients.length];

        for (int i = 0; i < recipients.length; i++) {

            addressTo[i] = new InternetAddress(recipients[i]);

        }

        msg.setRecipients(Message.RecipientType.TO, addressTo);

        // Optional : You can also set your custom headers in the Email if you want

        //msg.addHeader("Feedback Type: " + feedbackType, 

                     // "\nAs reported by " + portalUserName + ".");

        String header = 

            "Portal KPT telah menerima maklumbalas seperti berikut:\n\n";

        String namaPengadu = "Nama: " + portalUserName;

        String emailPengadu = "\nEmel: " + from;

        String kategoriAduan = "\nKategori: " + feedbackType;

        String keterangan = "\nKeterangan: \n\n" + message;

        String footer = 

            "\n\n---\nIni adalah emel janaan automatik. Sebarang kemusykilan teknikal tentang maklumbalas ini boleh emel ke test@test.test.my.";

        message = 

                header + namaPengadu + emailPengadu + kategoriAduan + keterangan + 

                footer;

        //message = message;

        // Setting the Subject and Content Type

        msg.setSubject(subject);

        msg.setContent(message, "text/plain");

        Transport.send(msg);

        logger.info("Leaving postMail");

    }

    private class SMTPAuthenticator extends javax.mail.Authenticator {

        public PasswordAuthentication getPasswordAuthentication() {

            String username = SMTP_AUTH_USER;

            String password = SMTP_AUTH_PWD;

            return new PasswordAuthentication(username, password);

        }

    }

2. Create String recipientAddress[] in your model. Not to forget getter and setter.

    String recipientAddress();

3. Call the function from your controller.

                   feedbackModel.setRecipientAddress({ "receiverEmail@testServer.gov.my" }); 

          feedbackService.postMail(feedbackModel.getRecipientAddress(), 

                                         "Portal Feedback: "+feedbackModel.getPortalUserName()+"- "+feedbackModel.getFeedbackType(), 

                                         feedbackModel.getFeedbackMessage(), 

                                         feedbackModel.getPortalUserEmail(), 

                                         feedbackModel.getPortalUserName(),

                                         feedbackModel.getFeedbackType());

4. Compile and test send an email.

5. Check your email. make sure that the email is sent.

6. Tada!! my work is done!

As usual. Any comment are highly appreciated?