Yao Ziyuan wrote:
STEP 2: A's mail client sends the message, waits 30 seconds, and then visits:
https://spamstatus.<B's mail domain>/?msgid=<Message-ID>&code=<PSR-Code>
This page displays one of these possible "spam statuses":
* MESSAGE CONSIDERED SPAM. (A CAPTCHA is also presented below.)
* MESSAGE CONSIDERED NOT SPAM.
A possibile problem is that a spammer can send a few test messages,
check which one is not considered spam and flood with the same kind of
message for a while, then check again and change format if required,
thus increasing spam effectiveness. It doesn't need to solve the captcha
for this.
--
Claudio Telmon
claudio(_at_)telmon(_dot_)org
http://www.telmon.org
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