What to do with the emails already on the mailing lists?

There are various ways of obtaining informed consent. One of the most common is to send emails asking the data subject to confirm that they want to receive emails for the specific purposes indicated in the email. It should be noted that the specific purposes for which the emails are to be sent must be indicated, e.g. publicising cultural events promoted by the Institution, or disseminating news. You should also explicitly state that the absence of a reply should be considered as non-authorisation.