DISCOURSE_SMTP_USER_NAME: no-reply@REDACTED.gg
Is “no-reply@REDACTED.gg”
Is this your Roundcube SMTP login?
This Field is not your “noreply@yourdomain.com”. It will be your Roundcube login and password.
Does Roundcube support being a SMTP server?
Brevo com does have a free tier of 300 emails/day