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Dev.to
7/4/2026
The original headline is about DMARC p=reject not being sufficient for email deliverability, and mentions what else is needed.

The original headline is about DMARC p=reject not being sufficient for email deliverability, and mentions what else is needed.

Original: Why DMARC p=reject Isn't Your Ultimate Deliverability Shield (And What You're Missing)

Short summary

DMARC p=reject provides email authentication but isn't sufficient alone; proper SPF/DKIM alignment, sender reputation management, list hygiene, and complementary protocols like BIMI and MTA-STS are essential for reliable deliverability. Implement continuous monitoring and incident response planning.

  • •DMARC p=reject prevents spoofing but depends on correct SPF/DKIM alignment
  • •Third-party senders, forwarding, and subdomain policies complicate deployment
  • •Complete email security requires reputation management, list hygiene, and protocols like BIMI/MTA-STS

Generated with AI, which can make mistakes.

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