Cheapest way to run Discourse?

[Architect]

There is a guide for troubleshooting here:

Troubleshoot email on a new Discourse install

You just installed Discourse via the install guide, but email doesn’t seem to work. Unfortunately this means you can’t log in as an admin to finalize the install. Let’s troubleshootize! Try the doctor If you run ./discourse-doctor it will check several ways that your mail configuration might be broken, and offer advice. Try that first. Did you enter email settings correctly? The simplest way is to run ./discourse-setup again. Did you enter everything correctly? You…

Would recommend opening help ticket with your mail sender to diagnose problem.