AlmaLinux OS 9 must have the postfix package installed.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-272485 | ALMA-09-006845 | SV-272485r1069405_rule | CCI-000015 | medium |
| Description | ||||
| Postfix is a free, open-source mail transfer agent (MTA) that sends and receives emails. It is a server-side application that can be used to set up a local mail server, create a null-client mail relay, use a Postfix server as a destination for multiple domains, or choose an LDAP directory instead of files for lookups. Postfix supports protocols like LDAP, SMTP AUTH (SASL), and TLS. It uses the Simple Mail Transfer Protocol (SMTP) to transfer emails between servers. Satisfies: SRG-OS-000304-GPOS-00121, SRG-OS-000343-GPOS-00134, SRG-OS-000363-GPOS-00150, SRG-OS-000447-GPOS-00201 | ||||
| STIG | Date | |||
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 | |||
Details
Check Text (C-272485r1069405_chk)
Verify that AlmaLinux OS 9 has the postfix package installed with the following command:
$ dnf list --installed postfix
Example output:
postfix.x86_64 2:3.5.9-24.el9 @AppStream
If the "postfix" package is not installed, this is a finding.
Fix Text (F-76445r1069346_fix)
Install the postfix package with the following command:
$ sudo dnf install postfix