[Help] SMTP options for Authelia - sh.itjust.works

Hello, I am trying to setup Authelia using apalrd tutorial [https://www.apalrd.net/posts/2024/ultimate_authelia/]. In the configuration file, I need to setup a SMTP server to send email from. I am currently using proton mail and they don’t have smtp support out of the box, you have to go through their bridge. I’ve tried to find tutorial on how to use Proton Bridge CLI to be able to use it as my SMTP locally, but the information seems scarce on that front. (keep in mind that I am no expert). So my question is as follows : what are my option to have a functional SMTP configuration on my Authelia server? Thank you