PermaLinkVia Ferris Research: Why Challenge Response Is Bad
05:29:36 PM

For those few people who need convincing, Richi Jennings has posted a very concise summary of what's wrong with challenge-response anti-spam systems.


C/R shifts the cost of spam from recipients to the senders of legitimate mail. How dare you make me prove that I am who I say I am? I've already published an unambiguous SPF record that says that my IP address is permitted to send email from my domain; what more do you want? We won't win the war against spam until the costs are shifted to the spammers.


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