> Firstly, Gmail's success is entirely predicated on the health of the global email ecosystem.

That simply is not relevant anymore if 99% of email is on Gmail.

I want to echo the exact same issues as the original author. Running my own email servers since the 90s I recently just “gave up” - no single indication about spam issues. All green on several tests. But Google rejects mail. Zero help or tools from google to get off their filter or whatever it is that makes these kind of decisions.

Friends and family all have Gmail accounts for those important emails that Must go through. Enough said.

I’ve moved my email to another provider and stopped self hosting.