Detections
Analytics

1.149 ALMA-09-019490

Information

AlmaLinux OS 9 must be configured to prevent unrestricted mail relaying.

GROUP ID: V-269252
RULE ID: SV-269252r1050134

If unrestricted mail relaying is permitted, unauthorized senders could use this host as a mail relay for the purpose of sending spam or other unauthorized activity.

Solution

Modify the postfix configuration file to restrict client connections to the local network with the following command:

$ postconf -e 'smtpd_client_restrictions = permit_mynetworks,reject'

See Also

https://workbench.cisecurity.org/benchmarks/27039

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CCI|CCI-000366, Rule-ID|SV-269252r1050134_rule, STIG-ID|ALMA-09-019490, Vuln-ID|V-269252

Plugin: Unix

Control ID: 6050cdea39977f6b41ff56b87911528a82b7aefc3f8975784d0a051bc9a1e227