Or do I need to add validator and sanitizing scripts like I keep reading about? I am very confused about how to implement that sort of stuff.

Btw, this is for an html form I made on a website, and the form uses PHP to send user input info to my email. It doesn't ask for credit cards or ssns or anything super dangerous, but it does need a lot of personal info, so I want to keep it safe.

The website is hosted on yahoo, and there's an option for SSL encryption and it says something like "put webpages and forms in here that has important data you want to keep safe". So...is that enough?