Easy! Don’t open a spam message. Just click inside the check-box next to it, then click Spam to let us know it’s something you’d rather not ever see again. We pay a lot of attention to spam you report to us. It gives us tools to disrupt the latest tricks and techniques that spammer individuals and spammer companies are using to try to evade our filters.
If you change your mind or think you made a mistake, just look for the next message from that sender in your Bulk folder and click Not Spam to reverse your vote.