java邮件群发 垃圾邮件问题~~~~急

Question

牛人们给说说，如题，如何去避免垃圾邮件啊!!!!
为什么发送出去的都是垃圾邮件啊？？？

Answer 1

package com.city.sxzlc.mail;
import java.util.Date;
import java.util.Properties;import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;public class MailSend {
    private String EMail;
    private String id;
    private String pass;
    public MailSend(String EMail,String id,String pass){
        this.EMail = EMail;
        this.id = id;
        this.pass = pass;
        
    }
    
    public boolean sendEmail(){
        String from="[email protected]";
        String to = EMail;
        
        String text="您已成功注册，可以使用该平台进行留言，您的帐号是:"+id+
                    "密码是:"+pass+"\n"+"希望您保存该邮件,以便忘记密码时查找";
        
        String mailserver = "smtp.sina.com";
        String name = from;
        String pass ="XXXXXXXXXXXXXXXXXXXXXXXXX";
        Auth auth = new Auth(name,pass);
        
        
        //0
        Properties props = new Properties();
        props.put("mail.smtp.host", mailserver);
        props.put("mail.smtp.auth", "true");
        //1
        Session mailSession = Session.getInstance(props,auth);
        try{
            Message msg = new MimeMessage(mailSession);
            msg.setFrom(new InternetAddress(from));
            msg.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            msg.setSentDate(new Date());
            msg.setSubject("留言板注册成功");
            msg.setText(text);        
            System.out.println("before send");
            Transport.send(msg);
            
            System.out.println("发送成功");
            
        }catch(Exception e){
            System.out.println("发送失败");
            e.printStackTrace();
            
        }
        
        
        return true;
    }
    
    }

Answer 2

估计你发的邮件标题或者正文都是 TEST 之类毫无意义的东西，这些当然就被当作是垃圾邮件了。