According to current email-spoofing
In these days we are facing a strong feedback from customers and business-partners about SPAM-emails sent out in the name of our company using keim-additec.de sender domain adress, generated elsewhere out of our mailserver or internet provider. Typically at such spoofing-emails an invoice in word-format (*.doc or *.docx) is attached, containing potential dangerous malware. We are NOT submitting such kind of invoices in word-format, therefore please delete such emails completely and never open. We are sorry for this inconvenience out of our responsibility and have taken the necessary measures to stop this.