Re: [exim-dev] Passive Spam Revocation

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Autor: Simon Arlott
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CC: exim-dev
Assumpte: Re: [exim-dev] Passive Spam Revocation
On 26/10/09 01:32, Yao Ziyuan wrote:
> Currently almost all mail systems (e.g. Hotmail and Gmail) use a spam
> filter, which can drop good and important messages.


Only by flawed design. There's a 5xx SMTP response which could very
clearly indicate that it was spam.

> In the first case, A's mail client will report the status and the
> CAPTCHA to A. A can choose to solve the CAPTCHA to prove the message
> is not spam.


This only proves that a human or sophisticated program solved the CAPTCHA.

--
Simon Arlott