[prmoustache]

> or if you're leveraging a third party SMTP, they will ban you.

Not if you are paying them for the service.

There are ommercial email services that aren't google/microsoft/aws. My former company used to use one (can't remember the name) that provided you with smtp servers and a set of dedicated IPs per customers that were preused by them to build a good reputation beforehand.

I think the point is not necessary that you have to selfhost email (although it can be done, some people do), but depending on a single vendor through a proprietary service/API.