RHEL 9 must not have the sendmail package installed.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-257827 | SRG-OS-000480-GPOS-00227 | RHEL-09-215020 | SV-257827r1044892_rule | 2026-02-05 | 2 |
Description
The sendmail software was not developed with security in mind, and its design prevents it from being effectively contained by SELinux. Postfix must be used instead.
Satisfies: SRG-OS-000480-GPOS-00227, SRG-OS-000095-GPOS-00049
ℹ️ Check
Verify that the sendmail package is not installed with the following command:
$ dnf list --installed sendmail
Error: No matching Packages to list
If the "sendmail" package is installed, this is a finding.
✔️ Fix
Remove the sendmail package with the following command:
$ sudo dnf remove sendmail