What I want to talk about is the SPF - the Sender Policy Framework. And, to be more precise, what to do with it.

First off: What is it? It's a way to tell folks about who's allowed to send mail on your behalf. Ever recived mail from yourself telling you to buy Viagra? In most cases that wasn't your alter-ego (or your spouse) talking - it was a spammer posing as yourself. SPF aims to get rid of these nuisances.