Bonsoir je developpe une application JSP-SERVLET qui doit envoyer des emails, bon je'ai essayé de faire un petit teste mais j'ai une du genre :

534-5.7.14 <https://accounts.google.com/ContinueSignIn?sarp=1&scc=1&plt=AKgnsbvZx
534-5.7.14 SYodgumQ_n8W2EF1YM3hHwAuGTHAyupR-Jhx28vAilu1GchVPxh6sKrPw62Hk2ejM1JRHr
534-5.7.14 ns3Sbts2ndM4vionZ6hIFPkVphudgP1SAG51quxegaZie6xAbfacB6YUZHo0YzvgszfmcD
534-5.7.14 gwwwjdVqCqjZOpC9pihk_gD0tlnUxnhswg7D8mQMhvQCkXQhC8M9TPi2UOop976dddYXeX
534-5.7.14 XVxnJUA> Please log in via your web browser and then try again.
534-5.7.14 Learn more at
534 5.7.14 https://support.google.com/mail/bin/answer.py?answer=78754 w8sm16918549wja.4 - gsmtp

 et mon code java :

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

/**
 *
 * @author acer E1-510
 */
public class SendMail {
    
    public boolean SendMail() throws MessagingException{
          String smtpHost = "smtp.gmail.com";
    String from = "hornellama9@gmail.com";
    String to = "hlama@live.fr";
    String username = "hornellama9@gmail.com";
    String password = "Hornel91";
 
    Properties props = new Properties();
    props.put("mail.smtp.host", smtpHost);
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.port", "587");
 
    Session session = Session.getDefaultInstance(props);
    session.setDebug(true);
 
    MimeMessage message = new MimeMessage(session);   
    message.setFrom(new InternetAddress(from));
    message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
    message.setSubject("Hello");
    message.setText("Hello World");
 
    Transport tr = session.getTransport("smtp");
    tr.connect(smtpHost, username, password);
    message.saveChanges();
 
    // tr.send(message);
    /** Genere l'erreur. Avec l authentification, oblige d utiliser sendMessage meme pour une seule adresse... */
 
    tr.sendMessage(message,message.getAllRecipients());
    tr.close();
    return true;
    }
}