ud-af-boksen works by syncing e-Boks messages and delivers them as attachment to the user by email.
Deploy the app using the Heroku button.
Once the app is running you will need to set up two scheduled task:
rake messages:syncwill sync new messages.
rake messages:processwill deliver new messages by email and mark the message as delivered.
Open Heroku Scheduler and add these tasks to run every hour:
bundle exec rake messages:sync ; bundle exec rake messages:process