thank you for your help . Yes and this is what I did for most of my templates except the one that I wnat customers to have the option to reply
for example payment not paid templates can have a real email address so customers can reply however password reset successful templates can have
donotreply@mydomain.com
FYI, assuming your quantity has no max limit, you can leave the package option's "Max" quantity blank and it will automatically render a text field instead of the slider.