用javamail写的邮件发不出去

请问这个有啥错吗？
                String host = "smtp.163.com";
String from = "ptvnet@163.com";
String to = "sshu0205@163.com";

Properties props = new Properties();

props.put("mail.smtp.host", host);
props.put("mail.smtp.auth","true");
props.put("username","ptvnet");
props.put("password","******");

Session session = Session.getDefaultInstance(props, null);
session.setDebug(true) ;

MimeMessage message = new MimeMessage(session);

message.setSubject("设置主题");

message.setContent("hello!", "text/plain");

Address sendaddress = new InternetAddress(from);
Address toAddress = new InternetAddress(to);

message.setFrom(sendaddress);
message.addRecipient(Message.RecipientType.TO, toAddress);

message.saveChanges(); // implicit with send()

Transport.send(message);
System.out.println("success!");

提示这个错误：
nested exception is:
    class javax.mail.AuthenticationFailedException
    at javax.mail.Transport.send0(Transport.java:218)
    at javax.mail.Transport.send(Transport.java:80)

你搜索一下，你那个服务器肯定是需要验证才能发邮件的．你这样把用户名和密码给它，它不认识的．我记得好象是有一个什么验证类．我以前写过，现在忘记了．

我用foxmail的时候,163的邮箱经常出现认证失败,可能是163邮件系统本身的问题,你换个其它的邮箱实验下.

static class SmtpAuth extends javax.mail.Authenticator {
  private String user,password;

  public void setUserinfo(String getuser,String getpassword){
    user = getuser;
    password = getpassword;
  }
  protected javax.mail.PasswordAuthentication getPasswordAuthentication(){
      return new javax.mail.PasswordAuthentication(user,password);
  }
}

然后这样用:
SmtpAuth sa = new SmtpAuth();
sa.setUserinfo("ptvnet", "*****");
Session session = Session.getDefaultInstance(props, sa);

  Session session = Session.getDefaultInstance(props, new Authenticator(){
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}});

上面是简单的写法

另外建议直接使用apache  的commons-email，这个对javamail做了封装，使用更方便了。

没有用！我用＠chinaren.com也发不出去，加了Authentication类验证也没有用,这次是报这个错:
535 Error: authentication failed 或者@163.com也会报这个错也可能报:550用户被锁定
javax.mail.AuthenticationFailedException

奇怪是有的@163.com可以发出去邮件.
有更好的解决办法没有...

打开session的debug，把smtp命令与返回，贴出来看看。

/** 
     * 初始化SMTP服务器地址、发送者E-mail地址、接收者、主题、内容 
     */  
    public Mail(String smtpServer,String from,String displayName,String to,String subject,String content){  
        this.smtpServer=smtpServer;  
        this.from=from;  
        this.displayName=displayName;  
        this.ifAuth=false;  
        this.to=to;  
        this.subject=subject;  
        this.content=content;  
    }  
  
    /** 
     * 发送邮件 
     */  
    public HashMap send(){  
        HashMap map=new HashMap();  
        map.put("state", "success");  
        String message="邮件发送成功！";  
        Session session=null;  
        Properties props = System.getProperties();  
        props.put("mail.smtp.host", smtpServer);  
        if(ifAuth){ //服务器需要身份认证  
            props.put("mail.smtp.auth","true");     
            SmtpAuth smtpAuth=new SmtpAuth(username,password);  
            session=Session.getDefaultInstance(props, smtpAuth);   
        }else{  
            props.put("mail.smtp.auth","false");  
            session=Session.getDefaultInstance(props, null);  
        }  
        session.setDebug(true);  
        Transport trans = null;    
        try {  
            Message msg = new MimeMessage(session);   
            try{  
                Address from_address = new InternetAddress(from, displayName);  
                msg.setFrom(from_address);  
            }catch(java.io.UnsupportedEncodingException e){  
                e.printStackTrace();  
            }  
            InternetAddress[] address={new InternetAddress(to)};  
            msg.setRecipients(Message.RecipientType.TO,address);  
            msg.setSubject(subject);  
            Multipart mp = new MimeMultipart();  
            MimeBodyPart mbp = new MimeBodyPart();  
            mbp.setContent(content.toString(), "text/html;charset=gb2312");  
            mp.addBodyPart(mbp);    
            if(!file.isEmpty()){//有附件  
                Enumeration efile=file.elements();  
                while(efile.hasMoreElements()){   
                    mbp=new MimeBodyPart();  
                    filename=efile.nextElement().toString(); //选择出每一个附件名  
                    FileDataSource fds=new FileDataSource(filename); //得到数据源  
                    mbp.setDataHandler(new DataHandler(fds)); //得到附件本身并至入BodyPart  
                    mbp.setFileName(fds.getName());  //得到文件名同样至入BodyPart  
                    mp.addBodyPart(mbp);  
                }    
                file.removeAllElements();      
            }   
            msg.setContent(mp); //Multipart加入到信件  
            msg.setSentDate(new Date());     //设置信件头的发送日期  
            //发送信件  
            msg.saveChanges();   
            trans = session.getTransport("smtp");  
            trans.connect(smtpServer, username, password);  
            trans.sendMessage(msg, msg.getAllRecipients());  
            trans.close();  
             
        }catch(AuthenticationFailedException e){     
             map.put("state", "failed");  
             message="邮件发送失败！错误原因：\n"+"身份验证错误!";  
             e.printStackTrace();   
        }catch (MessagingException e) {  
             message="邮件发送失败！错误原因：\n"+e.getMessage();  
             map.put("state", "failed");  
             e.printStackTrace();  
             Exception ex = null;  
             if ((ex = e.getNextException()) != null) {  
                 System.out.println(ex.toString());  
                 ex.printStackTrace();  
             }   
        }  
        //System.out.println("\n提示信息:"+message);  
        map.put("message", message);  
        return map;  
    }  

结果:
DEBUG: setDebug: JavaMail version 1.3.1
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.qq.com", port 25

220 smtp.qq.com ESMTP QQMail Ver 2.2
DEBUG SMTP: connected to host "smtp.qq.com", port: 25

EHLO queguohua
250-smtp.qq.com
250-PIPELINING
250-SIZE 52428800
250-AUTH LOGIN
250-AUTH=LOGIN
250 8BITMIME
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "52428800"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Attempt to authenticate
AUTH LOGIN
334 VXNlcm5hbWU6
NTQ1MTIyNDk2
334 UGFzc3dvcmQ6
YXNkMTIzNDU2
535 Error: authentication failed
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.qq.com", port 25

220 smtp.qq.com ESMTP QQMail Ver 2.2
DEBUG SMTP: connected to host "smtp.qq.com", port: 25

EHLO queguohua
250-smtp.qq.com
250-PIPELINING
250-SIZE 52428800
250-AUTH LOGIN
250-AUTH=LOGIN
250 8BITMIME
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "52428800"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Attempt to authenticate
AUTH LOGIN
334 VXNlcm5hbWU6
NTQ1MTIyNDk2
334 UGFzc3dvcmQ6
YXNkMTIzNDU2
535 Error: authentication failed
javax.mail.AuthenticationFailedException邮件发送失败！错误原因：
身份验证错误!

at javax.mail.Service.connect(Service.java:264)
at javax.mail.Service.connect(Service.java:134)
at com.suntray.service2.Mail.send(Mail.java:175)
at com.suntray.service2.Mail.main(Mail.java:212)
备注:代码加了Authenticator类.我用的是我QQ信箱.报这个错.如果我用我自己163.com会报550:用户被锁定.如果用gq800307@163.com就没有问题.

声明.我引用了redleaf的代码来做测试..在此向redleaf表示谢意.
我用了很多网上示例做测试,但结果同9楼结果一样.