STIGQter: STIG Summary: Microsoft Exchange 2013 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 22 Jan 2021:

Exchange must have antispam filtering configured.

DISA Rule

SV-207317r615936_rule

Vulnerability Number

V-207317

Group Title

SRG-APP-000261

Rule Version

EX13-MB-000255

Severity

CAT II

CCI(s)

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

Weight

10

Fix Recommendation

Note: Configure the IP addresses of every internal SMTP server. If the Mailbox server is the only SMTP server running the antispam agents, configure the IP address of the Mailbox server.

Update the EDSP.

Open the Exchange Management Shell and enter the following command:

Single SMTP server address:

Set-TransportConfig -InternalSMTPServers @{Add='<ip address1>'}

Multiple SMTP server addresses:

Set-TransportConfig -InternalSMTPServers @{Add='<ip address1>','<ip address2>'}

Check Contents

Review the Email Domain Security Plan (EDSP).

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

Determine the Internal SMTP servers.

Open the Exchange Management Shell and enter the following command:

Get-TransportConfig | Format-List InternalSMTPServers

If any internal SMTP server IP address returned does not reflect the list of accepted SMTP server IPs, this is a finding.

Vulnerability Number

V-207317

Documentable

False

Rule Version

EX13-MB-000255

Severity Override Guidance

Review the Email Domain Security Plan (EDSP).

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

Determine the Internal SMTP servers.

Open the Exchange Management Shell and enter the following command:

Get-TransportConfig | Format-List InternalSMTPServers

If any internal SMTP server IP address returned does not reflect the list of accepted SMTP server IPs, this is a finding.

Check Content Reference

M

Target Key

2923

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