# Cis Gworkspace 3.1.3.4.3.4

> Ensure protection against any unauthenticated emails is enabled

- Skill: `cyberstrikeus/cis-gworkspace-3-1-3-4-3-4` (Agent Skill)
- Install (CLI): `npx skillmds@latest add cyberstrikeus/cis-gworkspace-3-1-3-4-3-4`
- Raw SKILL.md: https://api.skillmd.com/api/skills/cyberstrikeus/cis-gworkspace-3-1-3-4-3-4/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: cyberstrikeus (https://skillmd.com/u/cyberstrikeus)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/cyberstrikeus/cis-gworkspace-3-1-3-4-3-4

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# 3.1.3.4.3.4 Ensure protection against any unauthenticated emails is enabled

## Overview

| Property                  | Value                                        |
| ------------------------- | -------------------------------------------- |
| **CIS ID**                | 3.1.3.4.3.4                                  |
| **Level**                 | L1                                           |
| **Profile Applicability** | Enterprise Level 1                           |
| **Assessment Type**       | Manual                                       |
| **Section**               | Gmail > Safety > Spoofing and authentication |

## Description

Displays a warning when any message is not authenticated (SPF or DKIM).

## Rationale

You should protect your users from any emails that aren't authenticated (SPF or DKIM).

## Impact

Emails that aren't authenticated (SPF or DKIM) display a warning message to the recipient.

## Default Value

`Protect against any unauthenticated emails` = **unchecked**

## Audit

To verify this setting via the Google Workspace Admin Console:

1. Log in to [https://admin.google.com](https://admin.google.com) as an administrator
2. Select **Apps**
3. Select **Google Workspace**
4. Select **Gmail**
5. Under `Safety` - `Spoofing and authentication`, ensure `Protect against any unauthenticated emails` is **checked**

## Remediation

To configure this setting via the Google Workspace Admin Console:

1. Log in to [https://admin.google.com](https://admin.google.com) as an administrator
2. Select **Apps**
3. Select **Google Workspace**
4. Select **Gmail**
5. Under `Safety` - `Spoofing and authentication`, set `Protect against any unauthenticated emails` to **checked**
6. Select **Save**

## CIS Controls

| Controls Version | Control                                                   | IG 1 | IG 2 | IG 3 |
| ---------------- | --------------------------------------------------------- | ---- | ---- | ---- |
| v8               | 9.5 Implement DMARC                                       |      | x    | x    |
| v7               | 7.8 Implement DMARC and Enable Receiver-Side Verification |      | x    | x    |