I remember being able to include a standard text file, perhaps a .csv, in the 3.x branch. The search would then iterate line-by-line through the entries in said file, much like a subsearch would work. While I suspect I could do this with a python script of some kind, is there any way to do this in 4.x? The use case scenario in this case could be iterating through a very long list of domain names.
There are a few ways you can input files as search terms.
inputcsv and inputlookup
Both of the above commands should allow you to input a csv or similar data.