On Mit, 2010-12-01 at 16:17 -0500, David F. Skoll wrote:
> On Wed, 1 Dec 2010 16:02:03 -0500
> Michael Grant <mgr...@grant.org> wrote:
>
> > The main problem with this approach is how does
> > someone send you mail if they're not on your contact list? I don't
> > have any magic answers how to solve that beyond what's already out
> > there as in return messages with captchas in them or things like Blue
Some people (including me) do not like to be Turing-tested. And if you
Turing-test me, why shouldn't I require the same in the other direction
before?
Apart from the obvious misuses of captchas.
> > Bottle seem to be quite effective.
>
> Challenge-Response systems are evil. I never reply to challenges and I
> typically blacklist systems that send them.
C/R is only means to make it move your own effort over to others.
The really "interesting" case is if both sides choose to require C/R to
get the first mail delivered.
Which should be a clear sign to everyone that C/R is basically a bad
idea.
> There's a fundamental economic principle at play: If you make it harder
> for spammers to send spam, then you make it less convenient to send email
> to someone you've never written to before. There is simply no way around
> that.
Even worse, the professional spammers adapt faster to such new stuff
than the average admin or user.
[...]
Bernd
--
Bernd Petrovitsch Email : be...@petrovitsch.priv.at
LUGA : http://www.luga.at
