Hola estoy intentando hacer un programita java en netbeans para enviar un correo pero nada, no hay manera...da excepción :
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 465;

el código es:

public static void main(String [] args)
{
// Recipient's email ID needs to be mentioned.
String to = "[email protected]";

// Sender's email ID needs to be mentioned
String from = "[email protected]";

// Assuming you are sending email from localhost
String host = "localhost";

// Get system properties
Properties properties = System.getProperties();

// Setup mail server
properties.setProperty("mail.smtp.host", host);
properties.setProperty("mail.smtp.port","465");
// Get the default Session object.
Session session = Session.getDefaultInstance(properties);

try{
// Create a default MimeMessage object.
MimeMessage message = new MimeMessage(session);

// Set From: header field of the header.
message.setFrom(new InternetAddress(from));

// Set To: header field of the header.
message.addRecipient(Message.RecipientType.TO,
new InternetAddress(to));

// Set Subject: header field
message.setSubject("This is the Subject Line!");

// Now set the actual message
message.setText("This is actual message");

// Send message
Transport.send(message);
System.out.println("Sent message successfully....");
}catch (MessagingException mex) {
mex.printStackTrace();
}
}
}

He probado también con otros códigos que he encontrado en internet pero no va de ninguna manera...en fin, a ver si alguien puede darme alguna razón.

saludos