/**
   * Sent the message to a plain SMTP server like Waldo
   *
   * @param mmd the MailMessageData to send
   * @return success or failure
   */
  private boolean smtpSend(Mail mail) {
    boolean retVal = true;
    Session session = null;

    try {
      // Create a properties object
      Properties smtpProps = new Properties();

      // Add mail configuration to the properties
      smtpProps.put("mail.transport.protocol", "smtp");

      smtpProps.put("mail.smtp.host", mailConfig.getUrlSmtp());
      smtpProps.put("mail.smtp.port", mailConfig.getPortSmtp());

      if (mailConfig.isSMTPAuth()) {
        Authenticator auth = new SMTPAuthenticator();
        session = Session.getInstance(smtpProps, auth);
      } else session = Session.getDefaultInstance(smtpProps, null);

      // Display the conversation between the client and server
      if (DEBUG) session.setDebug(true);

      // Create a new message
      MimeMessage msg = new MimeMessage(session);

      // Set the single from field
      msg.setFrom(new InternetAddress(mailConfig.getUserEmail()));

      // Set the To, CC, and BCC from their ArrayLists
      for (String emailAddress : mail.getToRecipients())
        msg.addRecipient(Message.RecipientType.TO, new InternetAddress(emailAddress, false));

      if (mail.getCcRecipients() != null)
        for (String emailAddress : mail.getCcRecipients())
          if (!emailAddress.equals(""))
            msg.addRecipient(Message.RecipientType.CC, new InternetAddress(emailAddress, false));

      if (mail.getBccRecipients() != null)
        for (String emailAddress : mail.getBccRecipients())
          if (!emailAddress.equals(""))
            msg.addRecipient(Message.RecipientType.BCC, new InternetAddress(emailAddress, false));

      // Set the subject
      msg.setSubject(mail.getSubject());

      // Set the message body
      msg.setText(mail.getContent());

      // Set some other header information
      msg.setHeader("X-Mailer", "Comp Sci Tech Mailer");
      msg.setSentDate(new Date());

      if (mailConfig.isSMTPAuth()) {
        Transport transport = session.getTransport();

        transport.connect();
        transport.sendMessage(msg, msg.getRecipients(Message.RecipientType.TO));
        transport.close();
      } else Transport.send(msg);

    } catch (NoSuchProviderException e) {
      e.printStackTrace();
      JOptionPane.showMessageDialog(
          null,
          "There is no server at the SMTP address.",
          "SMTP-NoSuchProviderException",
          JOptionPane.ERROR_MESSAGE);
      logger.log(Level.WARNING, "There is no server at the SMTP address.", e);
      retVal = false;
    } catch (AddressException e) {
      e.printStackTrace();
      JOptionPane.showMessageDialog(
          null,
          "There is an error in a recipient's address.",
          "SMTP-AddressException",
          JOptionPane.ERROR_MESSAGE);
      logger.log(Level.WARNING, "There is an error in a recipient's address.", e);
      retVal = false;
    } catch (MessagingException e) {
      e.printStackTrace();
      JOptionPane.showMessageDialog(
          null,
          "There is a problem with the message.",
          "SMTP-MessagingException",
          JOptionPane.ERROR_MESSAGE);
      logger.log(Level.WARNING, "There is a problem with the message.", e);
      retVal = false;
    } catch (Exception e) {
      e.printStackTrace();
      JOptionPane.showMessageDialog(
          null,
          "There has been an unknown error.",
          "SMTP-UnknownException",
          JOptionPane.ERROR_MESSAGE);
      logger.log(Level.WARNING, "There has been an unknown error.", e);
      retVal = false;
    }
    return retVal;
  }
  /**
   * Sent the message to a Gmail account
   *
   * @param mmd the MailMessageData to send
   * @return success or failure
   */
  public boolean gmailSend(Mail mail) {
    boolean retVal = true;
    Transport transport = null;

    try {
      // Create a properties object
      Properties smtpProps = new Properties();

      // Add mail configuration to the properties
      smtpProps.put("mail.transport.protocol", "smtps");
      smtpProps.put("mail.smtps.host", mailConfig.getUrlSmtp());
      smtpProps.put("mail.smtps.auth", "true");
      smtpProps.put("mail.smtps.quitwait", "false");

      // Create a mail session
      Session mailSession = Session.getDefaultInstance(smtpProps);

      // Display the conversation between the client and server
      if (DEBUG) mailSession.setDebug(true);

      // Instantiate the transport object
      transport = mailSession.getTransport();

      // Create a new message
      MimeMessage msg = new MimeMessage(mailSession);

      // Set the To, CC, and BCC from their ArrayLists
      for (String emailAddress : mail.getToRecipients())
        msg.addRecipient(Message.RecipientType.TO, new InternetAddress(emailAddress, false));

      if (mail.getCcRecipients() != null)
        for (String emailAddress : mail.getCcRecipients())
          msg.addRecipient(Message.RecipientType.CC, new InternetAddress(emailAddress, false));

      if (mail.getBccRecipients() != null)
        for (String emailAddress : mail.getBccRecipients())
          msg.addRecipient(Message.RecipientType.BCC, new InternetAddress(emailAddress, false));

      // Set the subject line
      msg.setSubject(mail.getSubject());
      // Set the message body
      msg.setText(mail.getContent());

      // Set some other header information
      msg.setHeader("X-Mailer", "Comp Sci Tech Mailer");
      msg.setSentDate(new Date());

      // Connect and authenticate to the server
      transport.connect(
          mailConfig.getUrlSmtp(),
          mailConfig.getPortSmtp(),
          mailConfig.getUserNamePop3(),
          mailConfig.getUserPassPop3());

      // Send the message
      transport.sendMessage(msg, msg.getAllRecipients());

      // Close the connection
      transport.close();

    } catch (NoSuchProviderException e) {
      e.printStackTrace();
      JOptionPane.showMessageDialog(
          null,
          "There is no server at the SMTP address.",
          "Gmail-NoSuchProviderException",
          JOptionPane.ERROR_MESSAGE);
      logger.log(Level.WARNING, "There is no server at the SMTP address.", e);
      retVal = false;
    } catch (AddressException e) {
      e.printStackTrace();
      JOptionPane.showMessageDialog(
          null,
          "There is an error in a recipient's address.",
          "Gmail-AddressException",
          JOptionPane.ERROR_MESSAGE);
      logger.log(Level.WARNING, "There is an error in a recipient's address.", e);
      retVal = false;
    } catch (MessagingException e) {
      e.printStackTrace();
      JOptionPane.showMessageDialog(
          null,
          "There is a problem with the message.",
          "Gmail-MessagingException",
          JOptionPane.ERROR_MESSAGE);
      logger.log(Level.WARNING, "There is a problem with the message.", e);
      retVal = false;
    } catch (Exception e) {
      e.printStackTrace();
      JOptionPane.showMessageDialog(
          null,
          "There has been an unknown error.",
          "Gmail-UnknownException",
          JOptionPane.ERROR_MESSAGE);
      logger.log(Level.WARNING, "There has been an unknown error.", e);
      retVal = false;
    }
    return retVal;
  }