SECURITY INSIGHTSPF and DMARC: A Practical Email Security Guide
Understand SPF and DMARC, common policy mistakes and practical email security improvements.
Aug 15, 2026
SPF and DMARC are domain-level email security policies that help receiving systems evaluate messages claiming to come from your domain.
SPF
SPF publishes authorized sending infrastructure.
DMARC
DMARC adds alignment and policy controls and can provide reporting.
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