The key thing for me is that At at least I’m getting google ad impressions.
If something slips through, I block the sender instead of just marking the message as spam. This means I don't get any of the followup emails.
Filters alone almost completely stopped those emails, and never had a false positive.
I delete any and all recruitment emails, because my LinkedIn profile is plastered with "I am not looking for work, do not contact me about contracts or job offers". In fact I just don't visit LinkedIn at all.
All of this works well. My inbox is very focused. Most emails I get were written by a human who wishes to talk to me, and machines I want to hear from.