Your e-mail address is used for advertising purposes unless you opt out of advertising in general when registering for Cumulus. You can change this in your Cumulus profile at any time.
We also ask for your e-mail address if you contact the Cumulus Infoline online. This enables us to identify you clearly and prevents misuse. E-mail addresses obtained in this way aren't used for advertising purposes and are deleted immediately after your query has been processed.