How to Set Up the Google FEED-BACK-LOOP (FBL)
You can find out more by going to this link: https://knowledge.validity.com/hc/en-us/articles/220564607-Gmail-feedback-loop-FBL-overview
Of note -- Google's FBL does not send ARF complaints back. They only send aggragate reports so we won't get "complaint" data we can process.