protected void Button1_Click(object sender, EventArgs e)
        {
            MailAddress MessageFrom = new MailAddress("sender@163.com"); //发件人邮箱地址 
            if (Send(MessageFrom, "receiver@163.com", "找回密码", "您的密码是：78910"))
            {
                ScriptManager.RegisterClientScriptBlock(this.Page, GetType(), "alert", "<script>alert('发送邮件成功！');this.location='Login.aspx'</script>", false);
            }
            else
            {
                Response.Write("发送邮件失败");
            }
        }


        /// <summary> 
        /// 发送电子邮件 
        /// </summary> 
        /// <param name="MessageFrom">发件人邮箱地址</param> 
        /// <param name="MessageTo">收件人邮箱地址</param> 
        /// <param name="MessageSubject">邮件主题</param> 
        /// <param name="MessageBody">邮件内容</param> 
        /// <returns></returns> 
        public bool Send(MailAddress MessageFrom, string MessageTo, string MessageSubject, string MessageBody)
        {
            MailMessage message = new MailMessage();

            message.From = MessageFrom;
            message.To.Add(MessageTo); //收件人邮箱地址可以是多个以实现群发 
            message.Subject = MessageSubject;
            message.SubjectEncoding = Encoding.GetEncoding(936);
            message.Body = MessageBody;
            message.BodyEncoding = Encoding.GetEncoding(936);
            message.IsBodyHtml = false; //是否为html格式 
            message.Priority = MailPriority.High; //发送邮件的优先等级 

            SmtpClient sc = new SmtpClient();
            sc.DeliveryMethod = SmtpDeliveryMethod.Network; //将smtp的出站方式设为 Network
            sc.EnableSsl = false;//smtp服务器是否启用SSL加密
            sc.Host = "smtp.163.com"; //指定发送邮件的服务器地址或IP 
            sc.Port = 25; //指定发送邮件端口 
            sc.Credentials = new System.Net.NetworkCredential("sender@163.com", "123456"); //指定登录服务器的用户名和密码(发件人的邮箱登陆密码)

            try
            {
                sc.Send(message); //发送邮件 
            }
            catch
            {
                return false;
            }
            return true;

        }