Some here use Fastmail [1] with their domains. Others run their own self hosted mail servers. Fastmail is probably less expensive and less hassle unless one has a bit of knowledge of setting up mail servers. I don't know gsuite pricing or if this is a better option for your use-case.

My impression of self hosting is that your mail just ends up undelivered because you're not a big shot.

Thanks for the fastmail pointer. I'll take a look, but I am hoping to find a free option (at least at this point).

AlexITC

With self-hosting, you can do it but it takes time to get good reputation.

I have set https://github.com/postalserver/postal and there are many details you usually don't worry about, the cost involved is whatever server you pay for, still, this is more adequate when you want to send emails through an API, for normal usage patterns, AWS is cheaper and simpler to set up.