import org.apache.commons.mail.DefaultAuthenticator;
import org.apache.commons.mail.Email;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.SimpleEmail;

public class Malibu {

    public static void main(String[] args) throws EmailException {
        final String USERNAME = "user@gmail.com";//complete email address like jon_snow@gmail.com

        final String TO = "the_receiver@gmail.com";
        final String PASSWORD = "password_here";

        Email email = new SimpleEmail();
        email.setHostName("smtp.googlemail.com");
        email.setSmtpPort(465);
        email.setAuthenticator(new DefaultAuthenticator(USERNAME, PASSWORD));
        email.setSSLOnConnect(true);
        email.setFrom(USERNAME);
        email.setSubject("TestMail");
        email.setMsg("This is a test mail ... :-)");
        email.addTo(TO);
        System.out.println("sending");
        email.send();
        System.out.println("sent");
    }

}