private void SendMailByWeb()        

{            

             MailMessage objMailMessage = new MailMessage();

               SmtpMail.SmtpServer   =System.Configuration.ConfigurationManager.AppSettings["SMTP"];

  objMailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");             objMailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "2622703973@qq.com");           

objMailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", System.Configuration.ConfigurationManager.AppSettings["PWD"]);//密码可以不提供             objMailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpusessl", "true");//SMTP 服务器要求安全连接需要设置此属性

       objMailMessage.BodyEncoding = System.Text.Encoding.UTF8;              　　　　　　　　      objMailMessage.From = "mysendmc@sina.com";           

        objMailMessage.To = Request.Form["Textemail"];             　　　　　　         objMailMessage.Subject = "this is test";

        objMailMessage.Body = "Hi Pippo,<br/>This is testing EMAIL.";             objMailMessage.BodyFormat = MailFormat.Html;

            SmtpMail.SmtpServer = "smtp.sina.com.cn";

            try             {        

         SmtpMail.Send(objMailMessage);   

              Response.Write("发送成功");    

         }            

catch (Exception ex)  {               

  Response.Write(ex.Message);           

  }        

}