You have a few options. You can either host a web application in a servlet container like Tomcat, submit the form to the servlet which would then do the processing. Or you can either create a standalone GUI/Command Line client which accepts the input from the user and sends the mail.
The romantic image of an über-programmer is someone who fires up Emacs, types like a machine gun, and delivers a flawless final product from scratch. A more accurate image would be someone who stares quietly into space for a few minutes and then says “Hmm. I think I’ve seen something like this before.” - John D