Anti-phishing code. Why is it not a common security measure?

Questions
15

I’m not sure if we need services like this, especially because it’s very easy to spoof.

On the other hand, I am not sure what Microsoft uses for Outlook, but it’s been a while since I have seen a phishing scam on my inbox. That being said, their scam/phishing email detection is so strong, that sometimes I do not receive emails from few domains because Microsoft has flagged them as spam. I’m not talking about their email getting to spam, I’m talking about their email getting rejected.