You have the option to send out text messages in batches directly from OnlineFundraising to recipients with Danish phone numbers. You find the setup for this in the menu item SMS.
Read how to send SMS batch here.
Webinar about SMS campaigns in OnlineFundraising
Watch our webinar on how to set up SMS campaigns in OnlineFundraising, where Stephan will talk you through what you can do with text message campaigns in OnlineFundraising. 
Please note that the webinar is in Danish.