// Create some properties and get the default Session.
Properties props = System.getProperties();
props.put("mail.host", host);
props.put("mail.transport.protocol", "smtp");
// Set debug on the Session so we can see what is going on
// Passing false will not echo debug info, and passing true
// will.
mailSession.setDebug(sessionDebug);
// Instantiate a new MimeMessage and fill it with the
// required information.
Message msg = new MimeMessage(mailSession);