A bit off-topic, but I'm constantly surprised that e-mail companies are so bad at this. If I, as a user, keep corresponding with someone, what kind of brain-dea

A bit off-topic, but I'm constantly surprised that e-mail companies are so bad at this. If I, as a user, keep corresponding with someone, what kind of brain-dead system keeps putting their mails to spam? (answer: gmail) I am communicating with them, do you really think they are spamming me? It's so frustrating. And yes, their SPF & similar headers are correct (or at least they seem to be, as G of course doesn't tell me why it went to spam). I know I can setup filters, but I thought they had that "smart" machine learning thingy? Or at least some simple "if" statements? /rant