javamail发信的连接SMTP验证的问题

MailBean.Java

package fastfox.util;
import java.util.*;
import java.text.SimpleDateFormat;
import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;
import java.io.*;
public class MailBean {


public static void sendMessage(String smtpHost,String from,String to,String subject,String messageText)throws MessagingException{
System.out.println("Configuring mail session for:" smtpHost);
SmtpAuth sa=new SmtpAuth();
sa.getuserinfo("jcren","mypassword");
java.util.Properties props=new java.util.Properties();
props.put("mail.smtp.auth","true");
props.put("mail.smtp.host",smtpHost);
System.out.println("Constructing message- from=" from " to=" to);
InternetAddress fromAddress=new InternetAddress(from);
InternetAddress[] toAddresss=new InternetAddress[3];
toAddresss[0]=new InternetAddress("jcren@163.com");
toAddresss[1]=new InternetAddress("xxxxx@163.com");
toAddresss[2]=new InternetAddress("ccccc@163.com");
int i=0;
while(i<toAddresss.length){
Session mailSession=Session.getDefaultInstance(props,sa);
MimeMessage testMessage=new MimeMessage(mailSession);
testMessage.setFrom(fromAddress);
testMessage.addRecipient(javax.mail.Message.RecipientType.TO,toAddresss[i]);
testMessage.setSentDate(new java.util.Date());
testMessage.setSubject(subject);
testMessage.setText(messageText);
System.out.println("Message constructed");

Transport.send(testMessage);
System.out.println("Message sent!");
i ;
}
}

public static void main(String[] args){
String smtpHost="smtp.163.com";
String from="jcren@163.com";
String to="jcren@163.com";
String subject="Test message";
StringBuffer theMessage=new StringBuffer();
theMessage.append("ddddhello22,\n\n");
theMessage.append("Hope all is well on you end.\n");
theMessage.append("Cheers");
try{
MailBean.sendMessage(smtpHost,from,to,subject,theMessage.toString());
}catch(javax.mail.MessagingException exc){
exc.printStackTrace();
}
}

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

public void getuserinfo(String getuser,String getpassword){
user = getuser;
password = getpassword;
}
protected javax.mail.PasswordAuthentication getPasswordAuthentication(){
return new javax.mail.PasswordAuthentication(user,password);
}
}
}
JSP引用：
<%@ page contentType="text/html;charset=gb2312" import="java.util.*,java.sql.*" %>
<jsp:useBean id="mailbean" scope="page" class="fastfox.util.MailBean" />
<%
String mailto=request.getParameter("cust_mail");
String mailfrom="jcren@163.com";
String Subject="Subject";
String Content=request.getParameter("content");
mailbean.sendMessage("smtp.163.com",mailfrom,mailto,Subject,Content);
%>

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