How to use Let's Encrypt with NodeJS SMTP server?

Question

SMTP

This article says:

By default, smtp-server uses its own self-signed certificate, but I wouldn't recommend using it when Let's Encrypt is available.

So how to use Let's Encrypt with NodeJS SMTP server?

Answer 1

Just like with any other server - you get a certificate by somehow validating domain ownership (via HTTP or DNS), add it to the config of your mailer, do not forget to restart when updating so that it pulls up the new version.