RBL-Check for NAT IP

CMK version: 2.3.0p27
OS version: Debian 12

Hello!
I’m currently using CheckMK v2.3.0p27 and have installed the “Network Interface Address checks” plugin from CheckMK-Exchange.
So far, everything’s working fine. However, I have a private IP address on the interface of a mail server. How can I create an RBL check for this IP address, which is a fixed public IP address via NAT?
Thanks for your help.

You don’t. This is out of scope for this extension.
The extension uses the IP addresses collected via HW/SW inventory to check them for RBLs.