RHEL-09-215095 - RHEL 9 must have the s-nail package installed.

Information

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

Solution

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

$ sudo dnf install s-nail

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_9_V2R8_STIG.zip