Exchange must have antispam filtering configured.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-221251	SRG-APP-000261	EX16-ED-000550	SV-221251r961161_rule	2024-12-06	2

Description
Originators of spam messages are constantly changing their techniques in order 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 2016 provides both antispam and antimalware protection out of the box. The Exchange 2016 antispam and antimalware product capabilities are limited but still provide some protection.

Description

Originators of spam messages are constantly changing their techniques in order 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 2016 provides both antispam and antimalware protection out of the box. The Exchange 2016 antispam and antimalware product capabilities are limited but still provide some protection.

ℹ️ Check
Site should utilize an approved DoD scanner as Exchange Malware software has a limited scanning capability. If an approved DoD scanner is not being used, this is a finding.

✔️ Fix
Following vendor best practice guidance, install and configure a DoD approved scanner.