Our newsletter and other e-mail communications contain a so-called web beacon (tracking pixel) or similar technical means. Every time a newsletter or other marketing communication is sent, we collect information pertaining to the address file used, the subject and the number of e-mails sent. We can also see which addresses are yet to receive the newsletter or other communication, the addresses to which these have been sent and the addresses to which they failed to be delivered. In addition to this, we can see which addresses have opened the newsletter or other communication and how often they have clicked on which content. Finally, we can see which addresses have unsubscribed from this service.