Another action that's worth exploring is to see whether your ISP has some spam-blocking feature you can enable by logging on to your email account via web browser, assuming your ISP offers a webmail option for accessing your email. If you've never accessed your email via web browser instead of always using an email client, such as Outlook, Outlook Express, Thunderbird, etc., to see whether they offer this feature, then you may be overlooking a spam control option that's been available to you all along.
If your ISP does offer an online spam blocking feature, I recommend you use it. Then, your email client never even needs to deal with that spam; it's been blocked before being passed onto your email client.
I use Outlook Express and I don't have a spam problem; I have a good ISP.
