On 3 Oct 2004 16:48:59 -0000, John Levine wrote:
Any sort of per message callback (or per sender callback
which amounts to the same thing in view of the random way
spammers forge return addresses), will be in practice a DDOS
....
CLEAR already has BATV and CSV on the table.
If BATV uses a public scheme, presumably there is at least a DNS
query per message, to get the key.
Although this query would not go directly back to the 'caller'
and, therefore, is not strictly a call-back scheme, it does
impose a per-message, receive-time, cross-net exchange.
In terms of transaction costs, how would this differ from what
SES is proposing?
d/
ps. I'm not commenting on the issues of creating an operating a
new distributed query infrastructure. My question is only about
the per-message transaction cost.
--
Dave Crocker
Brandenburg InternetWorking
+1.408.246.8253
dcrocker(_at_)(_dot_)(_dot_)(_dot_)
brandenburg.com