javax.mail.AuthenticationFailedException异常
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我在servlet中写的邮件发送，老是提示javax.mail.AuthenticationFailedException错误，查了半天也没查出来是什么原因，请各位高手帮帮忙，源码如下：
String smtpServer = request.getParameter( "txtserver ");
? String emailTo = request.getParameter( "txtto ");
? String fromemail = request.getParameter( "txtfrom ");
? String subject = request.getParameter( "txtsubject ");
? String body = request.getParameter( "txtmessage ");
? try
? {
? Properties props = new Properties() ;
? props.put( "mail.transport.protocol ", "smtp ");
? props.put( "mail.smtp.auth ", "true ");
? props.put( "mail.smtp.host ",smtpServer);
? props.put( "mail.smtp.port ", "25 ");
? Session mailsession = Session.getInstance(props);
? Message msg = new MimeMessage(mailsession);
? msg.setFrom(new InternetAddress(fromemail));
? msg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(emailTo));
? msg.setSentDate(new Date());
? msg.setSubject(subject);
? msg.setText(body);
? msg.saveChanges() ;
// Transport transport;
// transport = mailsession.getTransport( "smtp ");
// transport.connect((String)props.get( "smtp.163.com "), "caojunkeke ", "06240624 ");
? Transport.send(msg);
? msg.writeTo(System.out );
? out.print( "邮件已成功发送到 ");
? }
? catch(Exception e)
? {
? System.out.println(e);
? }
------解决方法--------------------
需要验证，当然不行了
final String username = "username ";
? final String password = "password ";
?
? //使用验证
? Session session = Session.getDefaultInstance(props,
