Unless you have objected, we use your email address that we received when you sold a product or service to electronically send advertising for your own goods or services that are similar to those that you have already purchased from us to have. You can object to this use of your email address at any time by notifying us. The contact details for exercising the objection can be found in the imprint. You can also use the link provided in the advertising email. There are no other costs than the transmission costs according to the basic tariffs.