The issue with what you want is that most likely it would send notification of the Federal acceptance but what about those states and those that don't acknowledge right away, or the FBAR which could take longer.

Once a day I send out one email with bcc (blank carbon copy) to all the clients who are 100% accepted. It is an extra step.  Prior to that I had postcards printed up and would just drop them in the mail.  50% never made it to the recipient.