Re: [tlug] CAPTCHA on keitai

[Curt Sampson <cjs@example.com>]

On 2008-03-25 10:33 +0900 (Tue), Stephen J. Turnbull wrote:

> I don't consider challenge-response to be an implementation of
> "default deny", though, unless you use a tautological definition of
> "default" ("whatever gets trapped is the default that I'm denying").

So an e-mail message that, on receipt is rejected rather than delivered
is not "denied"? I'm curious as to what you do consider "deny"
behaviour, then.

> First, whitelisting email addresses is not an reliable implementation
> of "deny unknown senders";

True, but not relevant for the purposes of my argument. I'm not
concerned with exactly the criteria are, just that there are criteria
that can recognize the presence or absence of a set of things in the
e-mail, and in the case of not recognizing that presence or absence, has
a default action.

cjs
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