yes, they are, and they've been really really good. haven't seen any of the behavior you refer to. ever. now SORBS on the other hand... doesn't really exist any

yes, they are, and they've been really really good. haven't seen any of the behavior you refer to. ever. now SORBS on the other hand... doesn't really exist anymore (fortunately) but spamhaus has been great. especially when used as a filter in Postscreen.