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What DMARC Protects You From, and What It Does Not
A Hacker News discussion thread titled 'What DMARC Protects You From, and What It Does Not' contains user-submitted comments about the email authentication protocol DMARC — its security capabilities, limitations, and real-world deployment challenges.
Aug 3, 2026
PCI DSS DMARC Requirement: What Section 5.4.1 Requires
A Hacker News thread titled 'PCI DSS DMARC Requirement: What Section 5.4.1 Requires' contains only the word 'Comments' as its body — no substantive content, explanation, citation, or analysis of PCI DSS or DMARC.
Published Jul 24, 2026 · Analyzed Jul 28, 2026
DKIM2 and DMARCbis Have Landed
A forum thread titled 'DKIM2 and DMARCbis Have Landed' appeared on Hacker News, referencing unspecified updates to email authentication protocols DKIM and DMARC, with no substantive description or context provided.
Published Jul 6, 2026 · Analyzed Jul 10, 2026
Why DMARC's new "NP" tag can fail with DNSSEC
A Hacker News discussion thread raises technical concerns about potential failure modes of DMARC's new 'NP' (None Policy) tag when used with DNSSEC, highlighting an interoperability edge case.
Published Jul 5, 2026 · Analyzed Jul 8, 2026