Most mail providers have something like plus addressing. Properly used that already eliminates a lot of phishing attempts: If I get a mail I need to reset something for foobar, but it is not addressed to me-foobar (or me+foobar) I already know it is fraudulent. That covers roughly 99% of phishing attempts for me.

The rest is handled by preferring plain text over HTML, and if some moron only sends HTML mails to carefully dissect it first. Allowing HTML mails was one of the biggest mistakes for HTML we've ever made - zero benefits with huge attack surface.