You didn't mention what email program you are using.
I've got a couple of email accounts and gmail is one of them, and I've never gotten a single spam on it.
My sister has an AOL email account and she gets more spam in a single day than I've gotten in my entire life (maybe that's a slight exaggeration, but not by much). I've tried to get her to switch to something else, but that's like talking to a rock.