Poppy 5.0.0 - Selexion Rulez

No, I don't want to maintain a Darwinian perspective on software, email, spam or anything. Rather, the latest update of Poppy, introduces selection rules, which let you select certain types of emails handily (even employing Mendel-like assortment).
Poppy is a tiny and efficient mail checker, and it offers a very useful way of announcing new messages. (Windows)