I recently started a small hosting and web services operation, using a cPanel/WHM VPS to run the services. I want to offer free email registration to people through a web form. I am wondering how to integrate PHP with cPanel in order to create email accounts for people that complete the form. I do not want them to receive an entire hosting account, just a free email at the domain I choose.
What API's or mods must I install for this. Also, how do I check for multiple registration and integrate some sort of CAPTCHA?
Edit: I did do some searching of my own but failed to find any relevant tutorials on the matter. I would greatly appreciate any help with this.