On Tue, 8 Sep 2009, Wayne E. Bouchard wrote:
This is not actually a new problem. ISPs have been fighting this for some time. When a dud customer spams from a given IP range and gets it placed in various RBLs, when that customer is booted or otherwise removed, that block will probably get reissued. The new customer then calls up and says, "my email isn't getting through." All it takes is a
The difference/issue here is that it's easy for you when turning down or turning up a customer to check the IP space being revoked/assigned in the various popular public DNSBLs, sparing your customers the headache of being assigned blacklisted IPs. Until your next customer starts using the space and can't send us email, you have no way of knowing that we null routed the subnet on our MX cluster. ---------------------------------------------------------------------- Jon Lewis | I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________