Hello. Our mail server (running postfix 2.3.8, 15+ users) is reciving more and more spam every week. Right now we are reciving almost 10K spam messages per day (last week it was 5K), most of them are send to two accounts which, unfortunately for now, cannot be deleted. Our postifix configuration does not have any restrictions, i mean no message is rejected and amavis is configured to only add a spam tag to the subject. I was considering on enabling rbl restrictions. My question is, as messages in rbl lists are rejected (is this right??), wouldn't this make me a source of backscatter?.
Any help is greatly appreciated. Thanks. Diego.
