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

Video: Building a tool to copy-paste share terminal sessions using Claude Code for web - 23rd October 2025
Dane Stuckey (OpenAI CISO) on prompt injection risks for ChatGPT Atlas - 22nd October 2025
Living dangerously with Claude - 22nd October 2025

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