Spam/unsubscribe weirdness

I just got a message asking me to confirm that I was unsubscribing -- but I never tried to unsubscribe. It appears that this event was spam-related -- the unsubscribe message, which was relayed back to me, had a .exe file attached. Still, it seems quite odd that the spammer somehow created a connection between my (obviously harvested) email address and the suse-linux-e unsubscription address. Anyone have a clue as to what might have happened? Paul Abrahams