Spam has increased massively worldwide in the last three months.

I've installed spamassassin on both the home and work networks recently, and it's doing pretty well after a couple of weeks training and tweaking.

For a single PC running Windows, Thunderbird is a good and simple choice.

My experience of ISP's spam filters has been disappointing. Too many false positives and false negatives and not much you can do about them.

Anahata