on Wed, Feb 04, 2004 at 02:29:54PM -0500, Lloyd Zusman ([EMAIL PROTECTED]) wrote: > "Benjamin J. Stassart" <[EMAIL PROTECTED]> writes: > > > [ ... ] > > > > RBLs block a whole lot of spam. My mail server hosting 22 domains for > > friends and myself blocks between 1000-2000 e-mails a day based on RBL. > > It then blocks between 500-1000 a day based on invalid DNS. Envelope > > checking and blacklists then block around 50 a day. After all that > > individual users use TMDA, SpamAssassin, or combined to limit their spam > > further. > > > > TMDA creates confirm messages. If we can determine that the message is > > spam, there is no reason to generate an e-mail. It would significantly > > increase the amount of e-mail traffic are machine had to deal with if we > > only used TMDA to deal with all those spams. > > > > SpamAssassin is resource intensive. Eliminating that many e-mails before > > they have a chance to reach SpamAssassin is a good thing. > > > > That is the reason I use a multi-tiered approach. > > I use a similar approach, and I find it equally useful. > > Many people make the argument that challenge-response paradigms generate > too much traffic, and quite a few of these people use this argument to > outright reject any and all use of challenge-response. > > Few of these outright detractors seem to want to consider the fact that > a hybrid approach similar to what we use not only addresses this > problem, but also effectively prevents that last little bit of spam from > sneaking through.
Few of those criticising these "outright detractors" appear to
understand that the recipient of a challenge has no a priori basis for
determining what, if any, additional filters stand between your C/R
system and the Net.
I'd recommend taking a look at Brad Templeton's (very recently revised)
Best Practices page:
http://www.templetons.com/brad/spam/challengeresponse.html
Given his guidelines, I can assure you I will never receive a valid
challenge.
Peace.
--
Karsten M. Self <[EMAIL PROTECTED]> http://kmself.home.netcom.com/
What Part of "Gestalt" don't you understand?
Support the EFF, they support you: http://www.eff.org/
signature.asc
Description: Digital signature
_____________________________________________ tmda-users mailing list ([EMAIL PROTECTED]) http://tmda.net/lists/listinfo/tmda-users
