Simon Willison’s Weblog

Spammers embrace email authentication. “More spam than legitimate email is currently sent using Sender Policy Framework”

Posted 3rd September 2004 at 6:43 pm

Recent articles

Deep Blue - 15th February 2026
The evolution of OpenAI's mission statement - 13th February 2026
Introducing Showboat and Rodney, so agents can demo what they’ve built - 10th February 2026

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