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DKIM supports Ed25519-SHA256. https://datatracker.ietf.org/doc/html/rfc8463 https://datatracker.ietf.org/doc/html/rfc8463

• 1oooqooq 2y ago
  specs supports many things. I believe the question was more about the real world.
  • paulnpace 2y ago
    In the real world, DKIM specs only support Ed25519 and RSA.