Scale is Google’s go-to excuse for some things but in this case it doesn’t hold up to scrutiny. Having in my sent mail and inbox a traceable record of me, auth

Scale is Google’s go-to excuse for some things but in this case it doesn’t hold up to scrutiny. Having in my sent mail and inbox a traceable record of me, authenticated with a Google login, subscribing to a mailing list and then getting a subscription request acknowledgment back and then sending a further confirmation email, should be enough to tell the spam system that yes dammit I am interested in mail from this list and it is not to be considered spam, assuming it is on topic (a determination that is like ML 101 first quarter stuff and has been for some time, even across languages, like going back to, say, Damashek). That heuristic is so simply basic that I would be embarrassed for Google if I had to explain it to them. And yet there it is. Just one of many possible examples of how lame their spam filtering system is.