I receive about 60+ spams a day. If I had used all miracles that they promised I would have a dick long 5 feet by now. In the beginning (3-4 years ago) I used the unscribe feauture. That makes things even worse. I now use filters in outlook. I have about a hundred rules to filter out anything with viagra, penis, beauty, slimming, free whatever, astrology etc..etc.
And about mails with attachments my rules are simple:
I NEVER open an attachment from someone I don't know, or a company that I don't know. So far so good. No viruses or spyware. I don't use Norton because I noticed on several Pc's that it can fu..k up things big time.
Hope this helps
TFD