Dear Sir or Madam,
Your data is processed based on the necessity of the processing for purposes resulting from the legitimate interests pursued by the Controller on the basis of Article 6(1)(f) of the GDPR.
Legal basis: Regulation (EU) 2016/679 of the European Parliament and of the Council of 27.04.2016 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data and repealing Directive 95/46/EC (General Data Protection Regulation) (Official Journal of the EU L 119, p. 1).