How do I filter all gmails coming from the “via” specific domain?

I want to auto filter & delete all gmails coming from a “via” domain. Here’s an image showing what I mean:

gmail via tag

In this case, I want to filter all “…”

This question filters for the email sender and not the domain: Permanently block domain in Gmail

And this question seems to get at the same item I am trying to tackle, but does not delete, and provides a script with which I don’t know what to do: How can I filter mails on Gmail by a specific ‘via’ tag?