Insofar as there is an option provided, within the Internet offering, to input personal or business data (e-mail addresses, names, addresses), the disclosure of this data by the user is expressly on a voluntary basis. The use of and payment for all the services offered - to the extent technically possible and feasible - is also possible without specifying such data or by specifying anonymised data or a pseudonym. The use of the published contact data, disclosed in the framework of the imprint or comparable information, such as postal address, telephone and fax numbers as well as e-mail addresses by third parties for transmittal of information that has not been expressly ordered is prohibited. We expressly reserve the right to legal recourse against the sender of so-called spam mail upon infraction of this prohibition.