You will find the template "German Post / Deutsche Post - Internetmarke" by clicking on "New report".
Save your report by clicking on the "Save" button in the right top corner.
Start the export in DataChamp.
You can mark a single or multiple orders in Shopify and use "More actions":
For advanced usage setup a "filter". For example: "unfulfilled and paid orders today".
Open Deutsche Post Shop and select the correct "Internetmarke". (Dependent on weight.)
Then click the "Add sender and recipient" button and then select the "CSV import" tab.
The addresses are now displayed and can be transferred to the print set.