Java example

Here's a sample of the Java client creating a default JavaMail session:


   private Properties mailServerProperties;
   private Session getMailSession;
   private MimeMessage generateMailMessage;

   public void completeClientSend() throws AddressException, MessagingException {
      // Step1
      logger.info("n 1st ===> setup Mail Server Properties..");
      mailServerProperties = System.getProperties();
      mailServerProperties.put("mail.smtp.port", "587");
      mailServerProperties.put("mail.smtp.auth", "true");
      mailServerProperties.put("mail.smtp.starttls.enable", "true");
      logger.info("Mail Server Properties have been setup successfully..");
      // Step2
      logger.info("nn 2nd ===> get Mail Session..");
      getMailSession = Session.getDefaultInstance(mailServerProperties, null);
      generateMailMessage = new MimeMessage(getMailSession);
      generateMailMessage.addRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
      generateMailMessage.addRecipient(Message.RecipientType.CC, new InternetAddress("[email protected]"));
      generateMailMessage.setSubject("Greetings from Vige..");
      String emailBody = "Test email by Vige.it JavaMail API example. " + "<br><br> Regards, <br>Vige Admin";
      generateMailMessage.setContent(emailBody, "text/html");
      logger.info("Mail Session has been created successfully..");
      // Step3
      logger.info("nn 3rd ===> Get Session and Send mail");
      Transport transport = getMailSession.getTransport("smtp");
      // Enter your correct gmail UserID and Password
      // if you have 2FA enabled then provide App Specific Password
      transport.connect("smtp.gmail.com", "<----- Your GMAIL ID ----->", "<----- Your GMAIL PASSWORD ----->");
      transport.sendMessage(generateMailMessage, generateMailMessage.getAllRecipients());
      transport.close();
  }
}

In this code, you need to remove the comments and put the credential access to connect to Gmail as a server:

<----- Your GMAIL ID ----->", 
"<----- Your GMAIL PASSWORD ----->

The resulting output will be as follows:

1st ===> setup Mail Server Properties..
Mail Server Properties have been setup successfully..
2nd ===> get Mail Session..
Mail Session has been created successfully..
3rd ===> Get Session and Send mail
===> Your Java Program has just sent an Email successfully. Check your email..

Google can block the access by an external application. If it happens, the mail account configured as server will receive the message of access attempt. To allow the access, you must simply configure the Gmail account through the Google web console connecting to https://www.google.com/settings/security/lesssecureapps.

A simpler example is to inject the mail session of WildFly in your own code. The following is a smarter way of sending emails:

@Resource(name = "java:jboss/mail/Default")
private Session session;
...
Message message = new MimeMessage(session);
message.setRecipients(TO, InternetAddress.parse(addresses));
message.setSubject(topic);
message.setText(textMessage);
Transport.send(message);

WildFly has a default configured session. The session contains all the information of the SMTP server, such as the server URL, port, and credentials. This configuration will be seen in the next paragraph.

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Java example