On this tip from Jon Strande, I installed SpamBayes to Outlook. It's a cool bit of open source software and after a few days training, it's working very efficiently to separate the spam from the ham in email. I'm a novice with Bayesian filters but I found it fascinating as it starts to understand my own personal idea what is Spam and what isn't.

A good side effect is that it nudged me to review all the enewsletters I get and to unsubscribe from those I never actually read.