well, you have half of it, as any hit shown here by invaluement was missed by spamhaus. I can't give you the data for other cases because it's a short circuit -> 550 type of thing.
That's not an ideal metric. You really need to test every incoming message against each RBL (up to 4 or so, to avoid DNS timeouts). Postfix supports this with "warn_if_reject" before doing the actual "5XX" reject. It's the warnings that yield valid data, or at least they do with large and representative samples (which IME >= 100K msgs/day). Roger Marquis
