Problem using Java Mail API

Question

I have this servlet which needs to send mail using Java Mail API, however I am getting no password specified error, although the password work with gmail.

MailServiceImpl.java:

public class MailServiceImpl extends RemoteServiceServlet implements MailService {

    private static String HOST = "smtp.gmail.com";
    private static int PORT = 465;
    private String username = "[email protected]";
    private String password = "foo123"; 
    private Properties props = new Properties();

    @Override
    public void sendMail(String email) {
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true"); 

        props.put("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");

        Session session = Session.getInstance(props);
        try {
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("[email protected]"));
            message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse("[email protected]"));
            message.setSubject("Testing Subject");
            message.setText("Subcriber Email:," +
                    "\n\n " + email);
            Transport transport = session.getTransport("smtp");
            transport.connect(HOST, PORT, username, password);
            Transport.send(message);            
            transport.close(); // -- needed?

        } catch (Exception e) {
            e.printStackTrace();
        } 
    }
}

However I am getting this error:

javax.mail.AuthenticationFailedException: failed to connect, no password specified?
    at javax.mail.Service.connect(Service.java:329)
    at javax.mail.Service.connect(Service.java:176)
    at javax.mail.Service.connect(Service.java:125)
    at javax.mail.Transport.send0(Transport.java:194)
    at javax.mail.Transport.send(Transport.java:124)
    at com.mygwtapp.server.MailServiceImpl.sendMail(MailServiceImpl.java:43)

Sathwick · Accepted Answer · 2011-08-09 05:12:18Z

Try using SSL connection. It worked for me.

    Properties props = new Properties();
    props.put("mail.smtp.host", "smtp.gmail.com");
    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,
        new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("username","password");
            }
        });

    try {

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[email protected]"));
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse("[email protected]"));
        message.setSubject("Testing Subject");
        message.setText("mail text");

        Transport.send(message);

        System.out.println("OK");

    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }
}

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