Re: [Asrg] Turing Test ...

[Claus Assmann <ca+asrg@esmtp.org>]

On Wed, Apr 02, 2003, Art Pollard wrote:
> At 06:48 PM 4/2/2003 -0800, you wrote:
> >On Wed, Apr 02, 2003, Art Pollard wrote:
> > >
> > > Why not allow the e-mail client to pose a Turing test to anybody that is
> > > not in its whitelist?
> >
> >Depends on your whitelist.
> >
> >A group of people is supporting some open software so we get a lot
> >of questions via e-mail. A reply can come from various sources.
> >Which of the sources do you whitelist? Whenever I get a "TMDA"(?)
> >challenge as a response to my reply I delete it. If I knew in advance
> >that the person who asked the question uses such software I wouldn't
> >waste my time to provide free support for them.
> 
> True.
> 
> However, I would imagine an intelligent client would whitelist
> 
> 1) Addresses who have already passed the Turing test.
> 2) Addresses to which messages had been sent.
> 3) Domains to which messages had been sent for a limited period of time.
> 
> In the case you described, they sent you a support question and thus you 
> would already be whitelisted for your reply.

No.

Maybe I should make it more clear: you send a question to sendmail.org,
you can get an answer from esmtp.org, some university, some Unix
vendor, some other domain...

Hence your original mail must already include a "token" which allows
the reply to go through without depending on the sender address
(domain). The simplest way would be to allow mail with

Subject: Re: your original subject

through... (hence "your original subject" should be a bit more
descriptive than "Hi" or "Help"...)
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