Envoyer un email avec Javax

import java.util.Properties;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
 
/**
 * Envoyer un email
 */
public class SendMail {
 
    private Session session = null;
    private Transport transport = null;
 
    /**
     * Fixer les propriétés
     */
    public void connect(String host, String user, String password) throws NoSuchProviderException, MessagingException {
        Properties properties = new Properties();
        properties.setProperty("mail.transport.protocol", "smtp");
        properties.put("mail.smtp.auth", "true");
        //   properties.setProperty("mail.smtp.port", "587"); 
        this.session = Session.getDefaultInstance(properties, null);
        this.transport = this.session.getTransport();
        this.transport.connect(host, user, password);
    }
 
    public void send(String from, String to, String subject, String body) throws MessagingException {
        MimeMessage message = new MimeMessage(this.session);
        message.setSubject(subject);
        message.setContent(body, "text/plain");
        message.addRecipient(Message.RecipientType.TO,  new InternetAddress(to));
        message.setFrom(new InternetAddress(from));
        this.transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
        this.transport.close();
    }
 
    /**
     * Exemple pour envoyer un email avec SMTP
     */
    public static void main(String args[]) {
        try {
            SendMail email = new SendMail();
            email.connect("smtp.xxx.fr", "xx@FAI.fr", "motdepasse");
            email.send("dest@FAI.fr", "from@FAI.fr", "Envoyer un email avec JAVA", "Je suis le corps du message");
 
        } catch (MessagingException ex) {
            Logger.getLogger(SendMail.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}