# The DMARC point of contact for aggregate reports SHALL include reports@dmarc.cyber.dhs.gov

The DMARC point of contact for aggregate reports SHALL include reports@dmarc.cyber.dhs.gov.

Source: https://maester.dev/docs/tests/CISA.MS.EXO.4.3

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<div class="test-byline"><div class="test-byline-avatars"><a class="test-byline-avatar test-byline-avatar--author" href="/contributors/soulemike" title="Michael Soule · Original author"><img src="https://github.com/soulemike.png" alt="Michael Soule" width="28" height="28" loading="lazy" decoding="async" /></a></div><div class="test-byline-meta"><span class="test-byline-text">Contributed by <a href="/contributors/soulemike">Michael Soule</a></span><a class="test-byline-link" href="/contributors">All contributors →</a></div></div>

<p class="test-part">Part of <a href="/docs/tests/cisa">CISA</a> · Exchange Online · Email authentication · <a href="/docs/tests">All checks</a></p>

```powershell title="Run this check"
Invoke-Maester -TestId CISA.MS.EXO.4.3
```

## Overview

The DMARC point of contact for aggregate reports SHALL include `reports@dmarc.cyber.dhs.gov`.

Rationale: Email spoofing attempts are not inherently visible to domain owners. DMARC provides a mechanism to receive reports of spoofing attempts. Including reports@dmarc.cyber.dhs.gov as a point of contact for these reports gives CISA insight into spoofing attempts and is required by BOD 18-01 for FCEB departments and agencies.

**Note: Only federal, executive branch, departments and agencies should include this email address in their DMARC record.**

> For other organization's there are many services that offer managed DMARC analysis and reporting, though ensure you properly align your implementation with your organization's policies for data handling.

#### Remediation action:

* See MS.EXO.4.1v1 Instructions for an overview of how to publish and check a DMARC record.
* Ensure the record published includes reports@dmarc.cyber.dhs.gov as one of the emails for the RUA field.

#### Related links

* [Exchange admin center - Accepted domains](https://admin.exchange.microsoft.com/#/accepteddomains)
* [CISA 4 Domain-Based Message Authentication, Reporting, and Conformance (DMARC) - MS.EXO.4.3v1](https://github.com/cisagov/ScubaGear/blob/main/PowerShell/ScubaGear/baselines/exo.md#msexo43v1)
* [CISA ScubaGear Rego Reference](https://github.com/cisagov/ScubaGear/blob/main/PowerShell/ScubaGear/Rego/EXOConfig.rego#L207)

## Details

<details>
<summary>Every attribute of this check</summary>

| Field | Value |
| --- | --- |
| Test ID | CISA.MS.EXO.4.3 |
| Severity | Medium |
| Suite | CISA |
| Product | Exchange Online |
| Feature | Email authentication |
| Area | Email and collaboration protection |
| Resource type | Domain |
| User impact | Low |
| Implementation cost | Low |
| MITRE ATT&CK | T1684.002 Email Spoofing |
| Supports benchmark | CISA SCuBA Secure Configuration Baselines for Microsoft 365 (version ScubaGear main, 2026-10-11), requirement MS.EXO.4.3 |
| Criticality | SHALL |
| Upstream requirement | MS.EXO.4.3v1 |
| Supports controls | cisa-scuba:MS.EXO.4.3, nist-800-53-r5:SI-4(5) |
| PowerShell test | [Test-MtCisaDmarcAggregateCisa](https://github.com/maester365/maester/blob/main/tests/cisa/exchange/Test.CISA.MS.EXO.4.3.ps1) |
| Services | ExchangeOnline |

</details>

## Source

- Test: [`tests/cisa/exchange/Test.CISA.MS.EXO.4.3.ps1`](https://github.com/maester365/maester/blob/main/tests/cisa/exchange/Test.CISA.MS.EXO.4.3.ps1)
- Documentation: [`tests/cisa/exchange/Test.CISA.MS.EXO.4.3.md`](https://github.com/maester365/maester/blob/main/tests/cisa/exchange/Test.CISA.MS.EXO.4.3.md)