So, I have a set of clients registered with a web application, and I would like some third party marketing services to be able to send e-mails to my users, on my behalf, based on their anonymous usage statistics.
However, the users are pretty sensitive to privacy so I cannot provide these services with the real user e-mail address.
Ideally, I'd provide the third party service with fake e-mail address (on my domain), and then forward the e-mail to the actual user e-mail. Any idea on how to do it?