2013-AUG-18
Setup a mailman server, and a list for every doctor in the country.
Here is the tutorial_ http://freemars.org/howto/mailman.html
With mailing lists, customers could register themselves as recipients, and FastlegeVakten could send a message to the list every time that doctor gets some new places available.
This is a simple way to "outsource" the email subscriptions.
SMS-warnings and accounting will have to be handled as before for now.