STIGQter: STIG Summary: Microsoft Exchange 2016 Edge Transport Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 22 Jan 2021:

Exchange nonexistent recipients must not be blocked.

DISA Rule

SV-221236r612603_rule

Vulnerability Number

V-221236

Group Title

SRG-APP-000261

Rule Version

EX16-ED-000370

Severity

CAT II

CCI(s)

• CCI-001308 - The information system automatically updates spam protection mechanisms.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-RecipientFilterConfig -RecipientValidationEnabled $false

Check Contents

Note: If third-party anti-spam product is being used, the anti-spam product must be configured to meet the requirement.

Open the Exchange Management Shell and enter the following command:

Get-RecipientFilterConfig | Select Name, RecipientValidationEnabled

If the value of "RecipientValidationEnabled" is not set to "False", this is a finding.

Vulnerability Number

V-221236

Documentable

False

Rule Version

EX16-ED-000370

Severity Override Guidance

Note: If third-party anti-spam product is being used, the anti-spam product must be configured to meet the requirement.

Open the Exchange Management Shell and enter the following command:

Get-RecipientFilterConfig | Select Name, RecipientValidationEnabled

If the value of "RecipientValidationEnabled" is not set to "False", this is a finding.

Check Content Reference

M

Target Key

4079

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