Earlier quoted context omitted.
Google does this as well - neither a history of emailing back and forth nor a same-day reply will keep incoming email safe from being classified as spam if it's being sent by an ordinary mail server. Hell, Google even manages to classify emails as spam that are sent from one address on a GSuite account to another address on the same account.
I think it is time we realize that Google in its current form is broken in many ways. This is just one example. Others include: - insisting on captchas,and not just one, even when I'm logged in with my >10 year old, paid for account with two-factor enabled - not being able to detect flag attacks against legitimate accounts (as seen on the front page today) - killing reader, trying to force everyone to use a single id…
Since Reader was shut down, we've gotten a lot of really good options for RSS.
Feedly, Inoreader, TinyTinyRSS, Newsblur, The Old Reader, Feedbin, FeedHQ…