I have configured ES to download the list of free webmail-hosting domains below as an intelligence download (Data inputs -> Intelligence Downloads). I don't want to trigger Threat Activity results based on these domains since they include common services like outlook.com, gmail.com, yahoo, etc., so I unchecked the Is Threat Intelligence checkbox when creating the file. It has successfully downloaded the file to splunk/var/lib/splunk/modinputs/threatlist/filename.txt, but I am at a loss for how to get it into a CSV for use in search. I tried to create a lookup definition in the GUI, but I presume that dialog is only able to see CSVs which are in the /lookups directories for various apps.
Does anyone have any suggestions for using my new intelligence file as a lookup? Thanks!