Infinite Responder is the nightmare of many paid mailing list php software creators. Once passed the installation and setup steps, you have the internet marketing most efficient solution that others pay loads of money for. Infinite responder may not have the strongest support ever but with some luck, it's owner would agree to join the small community gathered arount the unofficial forum www.infiniteresponder.info and take this "real threat" steps further... Anyway, you can download, install and try this great script and leave your feedback here or on the above forum. You'll realize that infinite responder is versatile, customizable and quite easy to use.