Have you ever asked yourself this question... Just where the heck these spammers got my email address ? Well, it's not so hard to guess where they got it.
You do get mails from bunch of friends & contacts daily don't you? Do you ever noticed who it was addressed TO ? There are bunch of email addresses you can find there. If the mail was a forwarded one, you can find even more email addresses in it. You can sell these addresses to companies out there for a certain amount of money. These companies will in turn will sell it to the spammers. So how can you avoid this ? You still can do what you do best, email & forward mails out, but try to hide the receipients email address at the BCC field.
Do you subscribed to any newsletter? Many of us receives newsletter daily, be it about IT, parenting, social networking, etc. Some website guaranteed your email privacy, but just how sure are we that they keep their word ? These days, many of us have more than one email account. Perhaps it's a good idea to assign one email account specially for newsletter.