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Field notes tagged subdomains

1 field note tagged subdomains. Back to everything.

01Subdomain DMARC: Why the sp= Tag MattersDoes p=reject cover your subdomains? Usually, but one tag can silently undo it. How policy inheritance works and how to lock down dormant subdomains.dmarcbest-practicessubdomainsJun 30, 20266 min read

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