DMARC
DMARC is a DNS-published mail posture signal that can describe how receiving mail systems should handle email that fails domain authentication checks.
Observed evidence
Observed by .auDO
These fields describe the public evidence .auDO records for this signal where available.
Interpretation
How to read this signal
This signal is useful as public evidence of visible posture or change, not as a conclusion on its own.
Why it matters
DMARC presence and policy can help contextualise visible mail posture when interpreted with MX records, SPF, TXT evidence and inferred email provider.
What change may indicate
DMARC changes may reflect policy tuning, rollout, provider migration, DNS changes, administrative cleanup or accidental removal.
Limits
What it cannot tell us
DMARC presence does not prove complete protection. DMARC absence does not prove negligence, compromise, intent, risk or whether a domain is otherwise safe.
Observations are descriptive records, not risk scores, allegations or evidence of compromise.
Observed patterns
Common observations
Report surface
Where it appears
This signal can appear in daily reports, the observation panel, methodology notes, derived report artefacts and preserved raw snapshot evidence when the relevant fields are present.
Nearby signals
Related signals
Use alongside
Explore this signal in context
DMARC is most useful when read alongside related mail posture signals, email provider context, dated reports and the plain-language DMARC explainer.