import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class SimpleEmail {

    public String smtpHostname;
    public String smtpPort;
    public String smtpUser;
    public String smtpPassword;
    public String fromAddress;
    public String toAddress;
    public String useTLS = "false";
    public String useAuthentication = "true";

    public static void main(String[] args) throws Exception{
       SimpleEmail mail01 = new SimpleEmail();
       mail01.smtpHostname = "smtpservername";
       mail01.smtpPort = "587";
       mail01.fromAddress = "email@example.org";
       mail01.smtpUser = "domain\\username";
       mail01.smtpPassword = "password";
       mail01.toAddress = "email@example.org";
       mail01.sendEmail();
    }

    public void sendEmail() throws Exception{
    	// TODO check if all properties where set
        Properties props = new Properties();
        props.setProperty("mail.transport.protocol", "smtp");
        props.setProperty("mail.smtp.port", smtpPort);
        props.setProperty("mail.smtp.starttls.enable", useTLS);
        props.setProperty("mail.smtp.host", smtpHostname);
        props.setProperty("mail.smtp.auth", useAuthentication);

        Authenticator auth = new SMTPAuthenticator();
        Session mailSession = Session.getDefaultInstance(props, auth);
        // uncomment for debugging infos to stdout
        // mailSession.setDebug(true);
        Transport transport = mailSession.getTransport();

        MimeMessage message = new MimeMessage(mailSession);
        message.setContent("This is a test", "text/plain");
        message.setFrom(new InternetAddress(fromAddress));
        message.addRecipient(Message.RecipientType.TO,
             new InternetAddress(toAddress));

        transport.connect();
        transport.sendMessage(message,
            message.getRecipients(Message.RecipientType.TO));
        transport.close();
    }

    private class SMTPAuthenticator extends Authenticator {
        public PasswordAuthentication getPasswordAuthentication() {
           String username = smtpUser;
           String password = smtpPassword;
           return new PasswordAuthentication(username, password);
        }
    }
}