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Re: Paul's Mailfrom (Was: IETF SMTP Working GroupProposal at

  • From: Brad Knowles
  • Date: Tue Aug 27 19:03:10 2002

At 7:43 AM +0000 2002/08/27, Paul Vixie wrote:

                          i doubt they will comment in detail here, since
 the actual numbers are likely to be some kind of internal secret.  i know
 i get far less spam from AOL than i used to, and i've assumed that this
 is because they decided to address the costs at the front end (in their
 service model) rather than the back end (in endless cleanup.)
They have implemented a lot of internal controls for users of the AOL client. For dial-up users trying to directly transmit mail, they have to pass through the transparent SMTP proxy which the AOL personnel set up and explicitly requested that it be added to the MAPS RBL.

So, one way they have to deal with the AOL internal controls, and the other way they are already blacklisted.

 no solution which does not progressively leverage the combined small
 efforts of millions of spam victims will ever be measurably effective other
 than in some small locality and/or for some brief instant.  see the DCC
 for an example (http://dcc.rhyolite.com/) of how to build and apply that
 leverage.  (i'm not giving the reference to vipul's razor because i said
 "millions.")
Indeed, that is a cool idea. I definitely want to look into that a lot more closely. Perhaps we can combine this with deep blacklist checking (beyond just the first hop), tagging, and Bayesian content filtering. Perhaps then we will have a temporary pass at a semi-decent anti-spam filter.

--
Brad Knowles, <brad.knowles@skynet.be>

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
-Benjamin Franklin, Historical Review of Pennsylvania.

GCS/IT d+(-) s:+(++)>: a C++(+++)$ UMBSHI++++$ P+>++ L+ !E W+++(--) N+ !w---
O- M++ V PS++(+++) PE- Y+(++) PGP>+++ t+(+++) 5++(+++) X++(+++) R+(+++)
tv+(+++) b+(++++) DI+(++++) D+(++) G+(++++) e++>++++ h--- r---(+++)* z(+++)




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