[Baypiggies] Challenge/Response email systems
bob at redivi.com
Fri Jun 16 01:34:16 CEST 2006
On Jun 15, 2006, at 4:07 PM, Marilyn Davis wrote:
> ------- On Thursday, June 15, 2006 guido at python.org wrote:
>> On 6/15/06, Marilyn Davis wrote:
>>> ----- On Thursday, June 15, 2006 guido at python.org wrote:
>>> Yuck? Because private mail gets a challenge?
>>> Please explain.
>> This antispam solution simply doesn't scale. As a matter of principle
>> I never respond to these challenges. Your loss.
> You did answer the challenge, Guido. So I got that email twice.
> Maybe you couldn't resist because it said door.py in the url?
Could've easily been someone else, given that the challenge URL ended
up on a public mailing list.
> I guess, if someone wants to write to me, they should be willing to
> answer a challenge once. If I write to someone first, or if I put
> them in my address book, of course they never see a challenge.
> It feels bad to displease our benevolent dictator, and I'm very
> sorry you feel this way, Guido.
> "Doesn't scale"? You mean that, if everyone sent a challenge for
> personal mail from an unknown address, that the amount of email
> would almost double, actually almost triple because usually the
> challenge bounces, and then the mail moves to the user's Junk
> folder -- all lovely Python code.
> Even so, mail transfer is a small resource compared to web
> traffic. And I can't give consideration to processing and network
> connection time when I'm comparing with time and aggravation for
> humans. IMHO, computers are here to save us time and aggravation.
> And, if everyone did Challenge/Response (C/R), computer-generated
> spam would simply be locked out of business.
C/R doesn't scale because spoofed challenges are indistinguishable
from real ones and you can't filter any of them out without filtering
all of them. If everyone did C/R you'd simply get hundreds of non-
filterable challenges a day instead of spam, and you would have no
idea which ones to respond to.
I'd rather have spam.
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