Additionally, print an extra warning if the
disable_emails site setting is set.
$ bin/rake 'emails:test' Testing sending to using localhost:1025, username: with auth. SMTP server connection successful. Sending to . . . Mail was not sent. Reason: message.to is blank ### WARNING The `disable_emails` site setting is currently set to non-staff. Consider changing it to 'no' before performing any further troubleshooting.