final Properties props = new Properties();
props.put("mail.smtp.host", "SMTPHOST");
props.put("mail.smtp.port", "PORTNUMBER");
props.put("mail.transport.protocol","smtp");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.tls", "true");
props.put("mail.smtp.ssl.checkserveridentity", "true");

final javax.mail.Authenticator auth = new javax.mail.Authenticator() {
   @Override
   public PasswordAuthentication getPasswordAuthentication() {
      return new PasswordAuthentication("EXAMPLENAME@PROVIDER.COM","PASSWORD");
   }
};

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

Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress("EXAMPLENAME@PROVIDER.COM", "EXAMPLENAME"));
msg.addRecipient(Message.RecipientType.TO, new InternetAddress("TOEXAMPLE@EXAMPLEPROVIDER.COM", "TOEXAMPLE"));
msg.setSubject("SUBJECT");
msg.setText("THE MESSAGE");
msg.saveChanges();
Transport.send(msg);