public bool SendEmail()
        {
            MailMessage msg = new MailMessage();

            msg.To.Add("to@qq.com");//收件人地址  
            msg.CC.Add("cc@qq.com");//抄送人地址  

            msg.From = new MailAddress("from@qq.com", "Edward");//发件人邮箱，名称  

            msg.Subject = "This is a test email from QQ";//邮件标题  
            msg.SubjectEncoding = Encoding.UTF8;//标题格式为UTF8  

            msg.Body = "this is body";//邮件内容  
            msg.BodyEncoding = Encoding.UTF8;//内容格式为UTF8  

            SmtpClient client = new SmtpClient();

            client.Host = "smtp.qq.com";//SMTP服务器地址  
            client.Port = 587;//SMTP端口，QQ邮箱填写587  

            client.EnableSsl = true;//启用SSL加密  
             //发件人邮箱账号，授权码(注意此处，是授权码你需要到qq邮箱里点设置开启Smtp服务，然后会提示你第三方登录时密码处填写授权码) 
            client.Credentials = new System.Net.NetworkCredential("from@qq.com", "password");
       
            try
            {
                client.Send(msg);//发送邮件 
            }
            catch (Exception)
            {
                return false;
            }
            return true;
        }