This means that a statistical analysis of the success or failure of online marketing campaigns can be carried out. By means of the embedded tracking pixels, DACHSER can identify whether and when an email was opened by a person affected and which of the links in the email were accessed by the person affected. Such personal data recorded via the tracking pixels contained in the newsletter are saved and evaluated by DACHSER to optimize the dispatch of newsletters and to align the contents of future newsletters better to the interests of the person affected.