AlmaLinux OS 9 must have the s-nail package installed.

The "s-nail" package provides the mail command required to allow sending email notifications of unauthorized configuration changes to designated personnel.

Verify that AlmaLinux OS 9 has the "s-nail" package is installed on the system with the following command:

$ dnf list --installed s-nail

s-nail.x86_64 14.9.22-6.el9 @AppStream

If "s-nail" package is not installed, this is a finding.

The s-nail package can be installed with the following command:

$ dnf install s-nail