According to a recent survey conducted on behalf of the digital association Bitkom, an average of 26 e-mails are received per professional mailbox in Germany every day. Processing them takes up a large part of working time. In addition, e-mails are an integral part of processes. Some of them must be retained under tax law, including purchase orders or invoices, but also any documents that may be relevant in connection with a business transaction. In addition, electronic messages often contain valuable knowledge that must be retained. But how can e-mails be elegantly archived? To date, there is no supreme solution. However, for a number of reasons, the PDF route currently seems to be the most practical.