In message <20A6DC6F260C0847A77C1F9F61B309C6DEBA7069@xxxxxxxxxxxxxxxxxxxxxxxxxxx >, Jonathan Curtis writes: > > 2. The impact of DNSxL's when applied on Inbound Email Servers is significant > with very little collateral damage. A good estimate is that over 70% of all sp > am email is prevented by the application of DNSxBL's, sparing many service pro > viders millions in hardware that would otherwise be spent processing and stori > ng these messages. In all cases, without this type of implementation, custome > rs' inboxes would be rendered completely useless. Small sites route around the damage caused by used DNSxBLs. This makes the outbound email more fragile. It also stops the small sites being able to use cryptography to stop man in the middle attacks as they are forced to insert a middle man. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@xxxxxxx _______________________________________________ Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf