Tbh, screw Google. They think that their monopoly makes them untouchable, so they abuse their position. Eg: yesterday my wife's friend group received an email from one member of the group. It contained 10 links. Other Gmail users replied-to-all. But my wife (not a Gmail user) had her reply blocked because the email contained 10 links. She was replying to the person who sent the email.

Pardon my language, but fuck you Google. If you want to implement mail filtering rules, do it fairly and equally.