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Which email authentication mechanisms help prevent domain spoofing?

  1. A SPF, DKIM and DMARC
  2. B TLS and HSTS
  3. C OAuth and SAML
  4. D IPsec and GRE
Answer

SPF, DKIM and DMARC

SPF authorises sending servers, DKIM signs messages, and DMARC tells receivers what to do when either fails and provides reporting.

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