I tried to set up a Discourse discussion forum for our neighborhood this year, and got stuck on setting up an email server that wouldn’t get blocked automatically by all major providers. Email is not a healthy ecosystem. You have to pay to send from one of the big trusted providers or else you get blocked just because your email ip address is untrusted by default. Yes fighting spam is important, but it’s shocking how much email providers rely on simple ip filters and trust levels rather than AI analysis of email content.