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← Back to Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide

V-259689

CAT II (Medium)

Exchange must have anti-spam filtering installed.

Rule ID

SV-259689r961161_rule

STIG

Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide

Version

V2R3

CCIs

CCI-001308

Discussion

Originators of spam messages are constantly changing their techniques to defeat spam countermeasures; therefore, spam software must be constantly updated to address the changing threat. A manual update procedure is labor intensive and does not scale well in an enterprise environment. This risk may be mitigated by using an automatic update capability. Spam protection mechanisms include, for example, signature definitions, rule sets, and algorithms. Exchange 2019 provides both anti-spam and anti-malware protection out of the box. The Exchange 2019 anti-spam and anti-malware product capabilities are limited but still provide some protection.

Check Content

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.

Fix Text

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