On 11/27/2004 11:28 AM, Vipul Ved Prakash sent forth electrons to convey:
Nod. This moves the content filtration problem to a different
place: on the outgoing servers. If the only way to send out spam
is through drones, then all spammers will move to using drones.
The conclusion that I draw from this is that content filtration
techniques used on outbound mail would have to be of the same
level of sophistication as inbound filtration today.
Consider a filter that detects that a mail stream contains outbound spam
only after the system has sent out, say 100 emails, but does so with
99.99% reliability.
(SpamAssassin is at least an order of magnitude better than that. Your
Razor2 scheme alone can do that, right? Note the word 'contains'; it's key.)
At that point, it blocks that mail stream until the system is cleaned.
That's good enough to make end user mailboxes orders of magnitude
cleaner than they are today, as zombies send out orders of magnitude
more than 100 emails.
Have you noticed that several large ISPs have seen the writing on the
wall and have started offering their users free (bundled) antivirus (and
anti-zombie) ? AOL, SBC, to name two huge ones off the top of my head.
They see that they'll have to be able to disinfect their users if they
want to ensure their mail keeps getting delivered. This is the writing
on the wall.
_______________________________________________
Asrg mailing list
Asrg(_at_)ietf(_dot_)org
https://www1.ietf.org/mailman/listinfo/asrg