public class Client {
    public static void main(String[] args) {
        String to = "rookedsysc36@google.com";
        String from = "holmes0306@naver.com";
        String host = "localhost";
 
        Properties properties = System.getProperties();
        properties.setProperty("mail.smtp.host", host);
 
        Session session = Session.getDefaultInstance(properties);
 
        try {
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(from));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            message.setSubject("This is the Subject Line!");
            message.setText("This is actual message");
            Transport.send(message);
            System.out.println("Sent message successfully....");
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}