deliverlensReproduce an SPF pass with a DMARC failure ↗
Use a sanitized identity table to show why a passing SPF result may not satisfy DMARC.
4 min readOperational field notes
Authentication
Practical blog drafts about authentication.
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How a policy lookup differs from a message result ↗
Show why DNS and received-message observations must remain separate in product copy and reports.
4 min readReading a DKIM body-hash failure from a controlled fixture ↗
Explain how post-signing content changes can break body verification while the key remains published.
4 min readCurrent DMARC standard changes and implementation boundaries ↗
Review current protocol text without implying every deployed receiver changed at the same time.
4 min readA documented DKIM rotation example ↗
Show a staged selector rotation that keeps old-message verification evidence understandable.
4 min readHow to review an authentication reporting-policy change ↗
Connect a source change to product copy, parser behavior, privacy, and dependent translations.
4 min read