send mail automatically after 24 hours

You can do this by your DataBase try this code.

You need SSIS to call a stored procedure every period of time.

Please check this for the stored procedure (I got it from here: http://www.experts-exchange.com/Microsoft/Development/MS-SQL-Server/Q_21944312.html):

CREATE   PROCEDURE [dbo].[PROC_CDOMAILALERTS]
      @From varchar(200),
         @To varchar(200),
         @ReplyTo varchar(200),      
         @Cc varchar(200),
      @ArchiveId varchar(200),
      @SMTPServer varchar(100),
         @Subject varchar(200) = " ",
         @Body varchar(4000) = " "
         AS
BEGIN
         Declare @iMsg int
         Declare @hr int
        Declare @ht int
         Declare @source varchar(255)
         Declare @description varchar(500)
         Declare @output varchar(1000)
      
      --********************************************************************
      --Set the ids to which Bcc should be sent
      Set @ArchiveId = @ReplyTo + ',' + @ArchiveId

      --************* Create the CDO.Message Object ************************
         EXEC @hr = sp_OACreate 'CDO.Message', @iMsg OUT


      --***************Configuring the Message Object ******************
      -- This is to configure the Remote Server Name or IP address.
      -- Replace MailServerName by the name or IP of your SMTP Server.
         EXEC @hr = sp_OASetProperty @iMsg, 'Configuration.fields("http://schemas.microsoft.com/cdo/configuration/sendusing").Value','2'
         EXEC @hr = sp_OASetProperty @iMsg, 'Configuration.fields("http://schemas.microsoft.com/cdo/configuration/smtpserver").Value', @SMTPServer

      -- Save the configurations to the message object.
         EXEC @hr = sp_OAMethod @iMsg, 'Configuration.Fields.Update', null

      -- Set the e-mail parameters.
         EXEC @hr = sp_OASetProperty @iMsg, 'To', @To
         EXEC @hr = sp_OASetProperty @iMsg, 'ReplyTo', @ReplyTo
         EXEC @hr = sp_OASetProperty @iMsg, 'Cc', @Cc
         EXEC @hr = sp_OASetProperty @iMsg, 'BCc', @ArchiveId
         EXEC @hr = sp_OASetProperty @iMsg, 'From', @From
         EXEC @hr = sp_OASetProperty @iMsg, 'Subject', @Subject

      -- If you are using HTML e-mail, use 'HTMLBody' instead of 'TextBody'.
         EXEC @hr = sp_OASetProperty @iMsg, 'TextBody', @Body
         EXEC @hr = sp_OAMethod @iMsg, 'Send', NULL
         EXEC @ht = sp_OADestroy @iMsg
        RETURN @hr

      
END

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