Redmine email notifications. Documentation vs Reality
You want setup email notifications for Redmine which run's under Debian Jessie. So, you going Aministration-Settings-Email notifications and see notification which says that you need go and edit /etc/redmine/<instance>/configuration.yml file. And you going into /etc/redmine and looking for your instance (default in most cases) and you can't find any configuration.yml
Let's fix it!