On Mon, 9 Apr 2007, Scott Kitterman wrote:
Fundamentally, in an environment where untargeted backscatter is not
What do you mean by "untargetted"?
2. Reciever doesn't bounce from known forwarders.
I'm not sure what the reciever's incentive is for #2. Unless forwarders
figure out how to live in a no backscatter world, I think they'll go the way
of finger and gopher.
As the world becomes harsher on backscatter, SRS and traditional
forwarders will die, and TENBOX/E forwarders will be the only ones
available. To attain full backscatter elimination, TENBOX/E forwarders
will simply refuse to serve clients who will not honor "#2".
I do think there's a good chance that ISPs will implement it if the
forwarders push them.
Basically, by refusing to do SRS, forwarders are pushing a collective
"Don't implement receiverside SPF, otherwise your customers lose their
forwarding." ultimatum on the ISPs, and the ISPs are buckling under it.
Hence the poor deployment of SPF checking.
So, I think it is quite possible that if forwarders push an "Implement
TENBOX/E such that we never see a 5xx, or else your customers lose their
forwarding" ultimatum, the ISPs will also buckle and deploy TENBOX/E.
---- Michael Deutschmann <michael(_at_)talamasca(_dot_)ocis(_dot_)net>
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