Asp.NEt邮箱验证修改密码通过邮箱找回密码功能

<input type="text" name="mail" id="mail"/>
     <span>*请输入邮箱</span><br/>
     <asp:button id="zhuce" runat="server" text="tijiao" onclick="btn" />

protected void btn(object sender, eventargs e)
    {
      string mail = context.request["mail"];
      mailmessage message = new mailmessage();
      message.from = new mailaddress("######", "#####");//发件人地址
      message.to.add(mail);//目标发件地址
      message.subject = "dssdds";//邮件标题
      message.body = "nihao";//邮件内容
      //发送邮件的smtp服务器地址
      smtpclient smtp = new smtpclient("smtp.163.com");
      smtp.credentials = new networkcredential("#########", "######");//发件人的用户名和密码
      smtp.send(message);
    }