Description:
Verifies that the DMARC message rejection option is set to p=reject.
Why:
Of the three policy options (i.e., none, quarantine, and reject), reject provides the strongest protection. Reject is the level of protection required by BOD 18-01 for FCEB departments and agencies.
Configured: The DMARC message rejection option is set to p=reject.
Not Configured: The DMARC message rejection options is not set to p=reject.
Scoring: Contributes up to 1 point to the Posture Recommendations score.
Category: Exchange
Microsoft Licensing: Works with Basic licensing
Secure Score Impact: Not verified. No Microsoft Secure Score control could be confirmed for this setting from published sources. See the note in README.md before publishing this field.
Remediation in Augmentt: No in-product remediation — remediate in the Microsoft admin portals.
Compliance Frameworks:
CISA SCuBA — MS.EXO.4.2
CIS Microsoft 365 Benchmark v6 (Level 1) — 2.1.9
CIS Microsoft 365 Benchmark v7 (Level 1) — 2.1.9
Microsoft documentation:
_KB status: new — this check is not yet documented in the knowledge base._
_Source: Sourced from the open-source Maester project and extended by Augmentt with multi-tenant support, compliance mapping and in-product remediation. Check ID CISA.MS.EXO.4.2 (module 1024)._
Sourced for this page:
Category — Maester test catalog (maester.dev/docs/tests) — test is graded against the "exchange" tier, so it evaluates a Microsoft Entra ID setting
Secure Score — No Microsoft Secure Score control name is published for this setting and Augmentt does not read one.
Draft metadata — apply these as Stonly tags in the console, then delete this block. The Stonly API cannot set tags, so they are recorded here instead.
Tags: posture-check · compliance-audit · Exchange Online · M365 Basic · CISA SCuBA · CIS M365 v6 L1 · CIS M365 v7 L1