77043 PHP Autoresponder

I would like a standard autoresponder. It needs to be able to everything a normal autoresponder does. Admin section should have: Be able to mange multiple campaigns which include the following for each campaign: Be able to send emails at user set intervals. Enter subject and messages in the admin section. Be able to personalize messages. Be able to generate sign up code for sign up form to use for ezines as well. Be able to import users from a text file Be able to select double opt-in or not Be able to send one time email to all users of specific campaign. Be able to add an automatic remove link to each email. Use a MySQL database. Send each campaign to its own thank you page. I will be including this script in my new product package so I would need to be able to resell the script. I know some programmers out there probably have a script like this ready to go.