The Javamail API

Remarks#

The JavaMail page on the Oracle website describes it as follows

The JavaMail API provides a platform-independent and protocol-independent framework to build mail and messaging applications. The JavaMail API is available as an optional package for use with the Java SE platform and is also included in the Java EE platform.

The primary site for the JavaMail project is now on java.net. From there you can find the javadocs for many versions of the APIs, links to the source code repositories, links for downloads, examples and hints for using JavaMail with some popular Email service providers.

Sending an email to a POP3 email server

This example shows how to establish a connection to an SSL-enabled POP3 email server and send a simple (text only) email.

    // Configure mail provider
    Properties props = new Properties();
    props.put("mail.smtp.host", "smtp.mymailprovider.com");
    props.put("mail.pop3.host", "pop3.mymailprovider.com");
    // Enable SSL
    props.put("mail.pop3.ssl.enable", "true");
    props.put("mail.smtp.starttls.enable", "true");

    // Enable SMTP Authentication
    props.put("mail.smtp.auth","true");

    Authenticator auth = new PasswordAuthentication("user", "password");
    Session session = Session.getDefaultInstance(props, auth);

    // Get the store for authentication
    final Store store;
    try {
        store = session.getStore("pop3");
    } catch (NoSuchProviderException e) {
        throw new IllegalStateException(e);
    }

    try {
        store.connect();
    } catch (AuthenticationFailedException | MessagingException e) {
        throw new IllegalStateException(e);
    }
    
    try {
      // Setting up the mail
      InternetAddress from = new InternetAddress("sender@example.com");
      InternetAddress to = new InternetAddress("receiver@example.com");

      MimeMessage message = new MimeMessage(session);
      message.setFrom(from);
      message.addRecipient(Message.RecipientType.TO, to);

      message.setSubject("Test Subject");
      message.setText("Hi, I'm a Mail sent with Java Mail API.");

      // Send the mail
      Transport.send(message);
    } catch (AddressException | MessagingException e)
        throw new IllegalStateException(e);
    }

Caveats:

Various details have been hardwired into the code above for illustration purposes.
The exception handling is NOT examplary. The IllegalStateException is a bad choice, for a start.
No attempt has been made to handle resources correctly.

Send Simple Email

Send HTML Formatted Mail