Delayed autoresponder script

I need a simple script that allows me to reply with Delay to people sending me an email. - Sender's Email is received to myname1 AT Mydomain Dot com - a delay of X hours after, then an autoresponse is sent to sender - X hours/day later an other autoresponse is sent to the same sender. That's it. I will define X. script needs to be efficient and reliable. - I need both responses to be going straight to the sender inbox each time. Very important. No Spam box. - Need to be able to send Html/Text in response replies Script needs to allow me to do the same thing for several email accounts I have setup on my Cpanel. ie. a pull down menu could allow me to choose the email account i need to set the 2 autoreplies for. Need to be done in php. Access to Cpanel will be provided Thank you