找回密码，发送原密码到注册邮箱！

 #region //发送邮件方法 支持带附件
        /// <summary>
        /// 发送edm邮件,可以附加附件
        /// </summary>
        /// <param name="StrTo">收件人地址</param>
        /// <param name="strFrom">发件人地址</param>
        /// <param name="StrBody">邮件内容</param>
        /// <param name="strSubject">邮件主题</param>
        /// <param name="name">发件人地址</param>
        /// <param name="pwd">发件人密码</param>
        /// <returns>返回是否发送成功</returns>
        public static bool SendEDMEmailBy47Server(string StrTo, string strFrom, string StrBody, string strSubject, string name, string pwd)
        {
            string sHos = string.Empty;//根据发送邮箱地址获取你的smtp主机 
            if (name.Contains("@163"))
            {
                sHos = "smtp.163.com";
            }
            else if (name.Contains("@126"))
            {
                sHos = "smtp.126.com";
            }
            else if (name.Contains("@qq"))
            {
                sHos = "smtp.qq.com";
            }
            else if (name.Contains("@sohu"))
            {
                sHos = "smtp.sohu.com";
            }
            else if (name.Contains("@sina"))
            {
                sHos = "smtp.sina.com";
            }
            else if (name.Contains("@tom"))
            {
                sHos = "smtp.tom.com.cn";
            }
            else if (name.Contains("@foxmail"))
            {
                sHos = "smtp.foxmail.com";
            }
            else if (name.Contains("@139"))
            {
                sHos = "smtp.139.com";
            }

            System.Net.Mail.MailAddress fromEmail = new System.Net.Mail.MailAddress(strFrom);//发件人的地址
            System.Net.Mail.MailAddress toEmail = new System.Net.Mail.MailAddress(StrTo);//收件人地址
            System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage(fromEmail, toEmail);

            mail.Body = StrBody;
            mail.Subject = strSubject;
            mail.IsBodyHtml = true;
            mail.BodyEncoding = System.Text.Encoding.UTF8;
            mail.Priority = System.Net.Mail.MailPriority.Normal;

            System.Net.Mail.SmtpClient smtpClient = new System.Net.Mail.SmtpClient();
            smtpClient.Host = sHos;//这里设置成你的smtp主机名或者ip地址
            smtpClient.Port = 25;
            smtpClient.UseDefaultCredentials = false;
            smtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
            smtpClient.Credentials = new System.Net.NetworkCredential(name, pwd);//你的用户名和密码
            //以下是邮件附件部分,path一般是从FileUpload控件中取~ 
            try
            {
                smtpClient.Send(mail);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                return false;
            }
            return true;
        }
        #endregion
        /// <summary>
        /// 用户根据账号找回密码
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void link_btn_mima_Click(object sender, EventArgs e)
        {
            if (txt_login_account.Text == "" || txt_login_account.Text == null)
            {
                //Response.Write("<script>alert('请输入用户名')</script>");
                lbl_error_show.Text = "请输入用户名";
            }
            else
            {
                user = bum.getUserModel(txt_login_account.Text);
                if (user.User_qq == "" || user.User_qq == null)
                {
                    //Response.Write("<script>alert('对不起您没有完善个人信息，无法找回密码!')</script>");
                    lbl_error_show.Text = "对不起您没有完善个人信息，无法找回密码!";
                }
                else
                {

                    string StrTo = user.User_qq.ToString() + "@qq.com";
                    string strFrom = "527553566@qq.com";
                    string StrBody = "您在B2BTYLY中注册账号：" + user.User_name + "所对应的密码是:" + user.User_pwd + "。";
                    string strSubject = "B2BTYLY网站找回密码提示！";
                    string name = "527553566@qq.com";//这是发送邮件的账号
                    string pwd = "************";//这是你的QQ密码
                    bool bResult = SendEDMEmailBy47Server(StrTo, strFrom, StrBody, strSubject, name, pwd);
                    if (bResult)
                    {
                        lbl_error_show.Text = "发送成功！";
                    }
                    else
                    {
                        lbl_error_show.Text = "服务器忙，请稍候再试！";
                    }
                }
            }
        }
        

以上是我实现的过程这个是在我的一个项目中用到的，没有专门去写demo，仅供学习参考和知识记录

有问题请联系QQ527553566