If the website allows for personal or commercial information to be input (email addresses, names, addresses), disclosure of these data by the user is completely voluntary. The use of, and payment for, all services offered is – if this is technically possible and reasonable – also to be allowed without the necessity of providing such data and/or by providing anonymized data or a pseudonym. It is not permitted for contact data published as part of the imprint or comparable details, such as postal addresses, telephone and fax numbers and email addresses, to be used by third parties to send information not specifically requested. We reserve the express right to take legal steps against the senders of so-called spam mails in contravention of this ban.