How to Add DMARC Aggregate Reporting Before Enforcement

DMARC aggregate reports show which sources are sending as your domain and whether those messages pass SPF or DKIM alignment. They are the monitoring layer you want before a stricter DMARC policy.

Quick answer: The safest first DMARC repair is usually adding or verifying aggregate reporting while the policy is still in monitoring mode.
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Before you change anything

  • Use a reporting mailbox or DMARC reporting service that can handle XML reports.
  • Do not move directly to quarantine or reject until legitimate senders are aligned.
  • Expect reports to show sources you did not know existed.

Step-by-step repair process

  1. Check the current DMARC record. It should be a TXT record at _dmarc.yourdomain.com and begin with v=DMARC1.
  2. Add or verify the rua tag. The rua value tells receivers where to send aggregate reports.
  3. Start with monitoring if the sender inventory is incomplete. A p=none policy lets you collect data before enforcement.
  4. Let reports accumulate. Review enough data to see recurring sender sources, not just one day of messages.
  5. Match report sources to your inventory. Unknown aligned sources, unknown failing sources, and legitimate failing sources require different fixes.
  6. Repair alignment before enforcement. Move policy only after the real senders pass SPF or DKIM alignment consistently.

Common mistakes to avoid

  • Adding a rua address that cannot receive or parse report volume.
  • Treating DMARC reports as inbox-placement reports. They show authentication and alignment, not full placement.
  • Ignoring third-party sender failures because the main mailbox provider passes.

Related repair guides

Collect email headersBuild a sender inventoryClean up SPF includesRepair DKIMMove DMARC beyond p=none

Reference points

These are technical reference points, not a substitute for checking your real message headers and sender inventory.

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