Patti (whipartist) wrote,

Challenge-response systems for spam

I hate challenge-response anti-spam systems. Their fatal flaw is that most From addresses are forged, so every time the user of one of these systems gets a piece of spam, the CR software spams a third party with a challenge.

One of my domains is currently being forged a lot, so I get lots of challenges in my mailbox for mail I never sent.

Starting now, I'm going to take the time to confirm every single one of these challenges, so that the asshole who spammed me with a challenge will get the spam he was trying to block.
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