>> the question seems to be "we used to reply to the sender with a >> notification that their message was blocked due to not being a >> list member, with options to wait or cancel; did we disable those >> notifications?" I sure hope so. These days about 99.9% of spam from unknown senders is spam with forged addresses, so responses are just more spam aka blowback. There are networks that send me far more blowback than all the other mail they send combined. R's, John PS: Postini, we're talking to you.