A political newsletter I like falls into the Gmail spam filter every time. The information displayed says that the sender has been reported as a spammer by many people, but the newsletter is something to which one has to subscribe.
I suspect there are forces at work trying to keep the newsletter from getting out, so I switched delivery to a private domain email account and it now comes in fine.
Domain email is not an option available to everybody, so the damage is still being done.
Things are getting trickier all the time.