I have a static page hosted on GitHub pages that has a form for a user to fill out with their email, and I want to be able to send that email address a generic message back with a coupon code. (the code will be the same in every email.)
I have 2 questions about this:
Is there an easy to integrate service that can accomplish this?
If there is not a service for this, what other options are there?
EDIT: I know that there is a way to do it using PHP. If possible I would like to keep my site on github pages and have it communicate with an already existing service.