You can turn off the Berichtenbox in MijnOverheid

Log in to MijnOverheid with your DigiD. Then go to “Instellingen.” You’ll see a list of organizations from which you receive messages. Find GBLT in the list. Uncheck the box and save your selection. Once you’ve disabled GBLT in the Berichtenbox, you’ll no longer receive digital mail from us. You’ll receive your mail at home again.