java-ee The Javamail API Sending an email to a POP3 email server

Example

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("[email protected]");
      InternetAddress to = new InternetAddress("[email protected]");

      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.