RHEL 10 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 RHEL 10 is configured to allow sending email notifications.

Verify the "s-nail" package is installed on the system with the following command:

$ sudo dnf list --installed s-nail Installed Packages s-nail.x86_64 14.9.24-12.el10 @rhel-10-for-x86_64-appstream-rpms

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

Configure RHEL 10 to have the "s-nail" package installed with the following command:

$ sudo dnf -y install s-nail