Connect up the feedback form and newsletter sign up form on my website

I have a simple website that has a feedback form and a sign up for newsletter form. Feedback form NAME EMAIL SUBJECT MESSAGE Newsletter form EMAIL ADDRESS The css is all done. All I need is someone to connect the appropriate script to email me whenever someone leaves feedback or signs up for a newsletter. Please use a script that has been tested and is secure. I do not need a spam relay. I prefer integrating a popular script not one that has not been extensively used and tested. Thanks.