Yao Ziyuan wrote:
> On Mon, Oct 26, 2009 at 5:07 PM, Renaud Allard <renaud@???> wrote:
>>
>> Yao Ziyuan wrote:
>>
>>> Showing a message's spam status to the sender can be bad, if he is
>>> really a spammer. So the page can also return:
>>> * SPAM STATUS HIDDEN. (A CAPTCHA is also presented below.)
>>> This means the sender can solve the CAPTCHA to see the status and
>>> change it to NOT SPAM.
>>>
>> So does that mean that you will send a captcha to every user sending a
>> mail? And for each mail sent, you will have to fill the captcha?
>>
>
> Of course not. a CAPTCHA is presented at a URL only if the message is
> considered spam. The sender's mail client knows that URL, and if the
> sender can solve the CAPTCHA, the message is re-marked as not spam.
Then, if the sender receives the captcha, he knows it has been
categorized as spam, so he does not have to solve the captcha to know that.
