We are having contactIDs with their an email address, but for specific engagement plans we have for the same user a different email address.
How can we define which mail to use when sending out. Today the fallback is always up to the default mail address in the xdb, but if we start building a preference center with multiple selections/categories and email addresses this is not working.
Also we need to capture all the optins and optouts for the different selections/Categories linked to their email address. the only solution we see now is to create a new ContactID in the xdb but than we loose the full power of the 1 view on a contact.