Enviar email desde Java 2º parte

Para usar el SMTP de google y nuestra cuenta de gmail tendremos que modificar el ejemplo anterior ya que google usa encriptación por SSL para la autenticación. A continuación el como se haría:


public class Main {
    
    private static final String SMTP_HOST_NAME = "smtp.gmail.com";
    private static final String SMTP_PORT = "465";
    private static final String emailMsgTxt = "Esto sería el mensaje";
    private static final String emailSubjectTxt = "Aqui el asunto";
    private static final String emailFromAddress = "micuenta@gmail.com";
    private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
    private static final String[] sendTo = { "Email destino"};
    
    
    public static void main(String args[]) throws Exception {
        
        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
        
        new Main().sendSSLMessage(sendTo, emailSubjectTxt,emailMsgTxt, emailFromAddress);
        System.out.println("Sucessfully Sent mail to All Users");
    }
    
    public void sendSSLMessage(String recipients[], String subject,String message, String from) throws MessagingException {
        boolean debug = true;
        
        Properties props = new Properties();
        props.put("mail.smtp.host", SMTP_HOST_NAME);
        props.put("mail.smtp.auth", "true");
        props.put("mail.debug", "true");
        props.put("mail.smtp.port", SMTP_PORT);
        props.put("mail.smtp.socketFactory.port", SMTP_PORT);
        props.put("mail.smtp.socketFactory.class", SSL_FACTORY);
        props.put("mail.smtp.socketFactory.fallback", "false");
        
        Session session = Session.getDefaultInstance(props,new javax.mail.Authenticator() {
            
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("micuenta@gmail.com", "micontraseñadegmail");
            }
        });
        
        session.setDebug(debug);
        
        Message msg = new MimeMessage(session);
        InternetAddress addressFrom = new InternetAddress(from);
        msg.setFrom(addressFrom);
        
        InternetAddress[] addressTo = new InternetAddress[recipients.length];
        for (int i = 0; i < recipients.length; i++) {
            addressTo[i] = new InternetAddress(recipients[i]);
        }
        msg.setRecipients(Message.RecipientType.TO, addressTo);
        
        
        msg.setSubject(subject);
        
        msg.setText(message);
        Transport.send(msg);
    }
}