关于使用JavaMail发送邮件是需要身份验证的问题

完整源代码如下：

<%@ page contentType="text/html;charset=GBK"%>
<%@ page import="java.util.*,javax.mail.*,javax.mail.internet.*"%>
<%
Properties props=new Properties();
props.put("mail.smtp.host","smtp.163.com");
props.put("mail.smtp.auth","true");
//设定发送邮件时需要进行身份验证
Session s=Session.getInstance(props);
MimeMessage message=new MimeMessage(s);
InternetAddress from=new InternetAddress("http://mail.163.com">Check your Inbox</a></P>
    <P>
      <a href="sendmail.jsp">Click here to send another!</a>
    </P>
  </body>
</html>