Changing "send-from" e-mail address

Steps to reproduce:

  1. Discourse working fine
  2. Edit app.yml, changing the one line exactly as suggested
  3. Run ./launcher rebuild app (always takes a very long time)
  4. Rebuild fails and forum is down.
  5. Run ./discourse-doctor
  6. Fails to fix.
  7. Restore web site from backup to state before edit of app.yml and it’s working again.

I tried it twice but forgot to export the logs/output before restoring the web site so I’ll leave it for now until I have more time if I feel like trying again.