STIGQter: STIG Summary: Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 02 Jul 2025:

Exchange must have anti-spam filtering installed.

DISA Rule

SV-259689r961161_rule

Vulnerability Number

V-259689

Group Title

SRG-APP-000261

Rule Version

EX19-MB-000137

Severity

CAT II

CCI(s)

• CCI-001308 - Automatically update spam protection mechanisms on an organization-defined frequency.

Weight

10

Fix Recommendation

Update the EDSP with the anti-spam mechanism used.

Install the AntiSpam module.

Open the Exchange Management Shell and enter the following command:

& $env:ExchangeInstallPath\Scripts\Install-AntiSpamAgents.ps1

Check Contents

Review the Email Domain Security Plan (EDSP).

Note: If using another DOD-approved anti-spam product for email or a DOD-approved email gateway spamming device, such as Enterprise Email Security Gateway (EEMSG), this is not applicable.

Open the Exchange Management Shell and enter the following command:

Get-ContentFilterConfig |Select-Object -Property Name, Enabled |Format-Table

If no value is returned, this is a finding.

Vulnerability Number

V-259689

Documentable

False

Rule Version

EX19-MB-000137

Severity Override Guidance

Review the Email Domain Security Plan (EDSP).

Note: If using another DOD-approved anti-spam product for email or a DOD-approved email gateway spamming device, such as Enterprise Email Security Gateway (EEMSG), this is not applicable.

Open the Exchange Management Shell and enter the following command:

Get-ContentFilterConfig |Select-Object -Property Name, Enabled |Format-Table

If no value is returned, this is a finding.

Check Content Reference

M

Target Key

5580