DMARC builds on SPF and DKIM to tell receiving mail servers what to do when an email fails authentication (e.g., reject, quarantine, or accept).
Why it matters:
- Prevents email spoofing and domain impersonation.
- Provides detailed reports showing who is sending mail from your domain.
- Required for strong domain reputation and compliance with modern email standards.
Pro tip: Start with a “none” DMARC policy to monitor activity before enforcing stricter rules like “quarantine” or “reject.”
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