SPF, DKIM and DMARC

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Parasitizing trust: How legitimate infrastructure becomes a delivery pipeline for attackers
writeup2026-10-21It is written here as SPF, DKIM and DMARC: sender authentication that shows whether a message came from expected infrastructure, but not whether content or transaction is legitimate.
Mikko Laakkonen (@mikkolaakkonen) on X
thread2026-10-17It is written here as SPF, DKIM and DMARC (email sender authentication).
email sender authentication

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