Suhail Gupta Suhail Gupta - 7 months ago 699
Java Question

javax.mail.AuthenticationFailedException: failed to connect, no password specified?

This program attempts to send e-mail but throws a run time exception:

javax.mail.AuthenticationFailedException: failed to connect, no password specified?


Why am I getting this exception when I have supplied the correct username and password for authentication?

Both the sender and receiver have g-mail accounts. The sender and the receiver both have g-mail accounts. The sender has 2-step verification process disabled.

This is the code:

import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;

class tester {
public static void main(String args[]) {
Properties props = new Properties();
props.put("mail.smtp.host" , "smtp.gmail.com");
props.put("mail.stmp.user" , "username");

//To use TLS
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.password", "password");
//To use SSL
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");


Session session = Session.getDefaultInstance( props , null);
String to = "me@gmail.com";
String from = "from@gmail.com";
String subject = "Testing...";
Message msg = new MimeMessage(session);
try {
msg.setFrom(new InternetAddress(from));
msg.setRecipient(Message.RecipientType.TO,
new InternetAddress(to));
msg.setSubject(subject);
msg.setText("Working fine..!");
Transport transport = session.getTransport("smtp");
transport.connect("smtp.gmail.com" , 465 , "username", "password");
transport.send(msg);
System.out.println("fine!!");
}
catch(Exception exc) {
System.out.println(exc);
}
}
}


Even after giving the password I get the exception. Why is it not authenticating?

RMT RMT
Answer

Try to create an javax.mail.Authenticator Object, and send that in with the properties object to the Session object.

Authenticator edit:

You can modify this to accept a username and password and you can store them there, or where ever you want.

public class SmtpAuthenticator extends Authenticator {
public SmtpAuthenticator() {

    super();
}

@Override
public PasswordAuthentication getPasswordAuthentication() {
 String username = "user";
 String password = "password";
    if ((username != null) && (username.length() > 0) && (password != null) 
      && (password.length   () > 0)) {

        return new PasswordAuthentication(username, password);
    }

    return null;
}

In your class where you send the email:

SmtpAuthenticator authentication = new SmtpAuthenticator();
javax.mail.Message msg = new MimeMessage(Session
                    .getDefaultInstance(emailProperties, authenticator));
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