Autoresponder cgi email script

Need a simple script that can do the following:

1) support multiple emails and up to 5 "scripted" for each email
2) on receiving the first incoming email, it has to get the reply email from the body of the email (gmail vacation autoreply for example fails here, but a manual reply of the email works, need this script to overcome where gmail and other vacation autoreply fails)

So for example, the person sends an email via the website and the script receives it. Firstly the script replies to the correct return email (not the website it was sent from) and then sends the first scripted reply. The original sender of the email gets the first reply and they send a reply back. The script then replies to this new email and sends the second scripted reply. This would continue until either the 5 levels of replies were used up or only until however many levels of replies are specified (perhaps only 2 or 3). Any questions let me know.

Additional Info (Added 10/14/2007 at 9:06 EST)...Attached file: script1.png

Additional Info (Added 10/15/2007 at 11:54 EST)...Simple description here
1) receives forwarded email and matches it to email on file
2) replies to email and includes the 1st scripted reply
3) if person replies to the email it will be forwarded to the cgi script again which will then use the 2nd scripted reply.

Repeat above until no more scripted replies.