[nicbou]

I have a similar issue with spam related to running a website. as a rule of thumb, if it contains certain keywords or a very generic greeting ("Dear website.com team") and comes from a Gmail address, I can safely delete it. I have a filter for that.

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.