Through an attack against our e-mail infrastructure we experienced a chain reaction that ultimately also resulted in the Sitejet application becoming partially unusable. For example, changes could not be saved or the app did not open at all at times. Also e-mails were delivered with a delay. We apologize very much for the inconvenience caused and take the situation very seriously. After a thorough investigation, we will take several measures in the next few days to prevent such a problem in the future: