, 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
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews(_at_)isc(_dot_)org
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