Set up a background macro in your mail database. This should be run on documents not processed by the macro and it should be run your mail server. The formula is:
@If(DeliveredDate = "" | From = "Your Name"; @Return (""); DeliveredDate > [06/30/93 05:00:00 PM]; @MailSend(From;"";"Your Name"; ""; "re: Memo sent to Your Name" + Subject; "Thank you for your correspondence. I shall return."); @Return("")); SELECT @All