This may not be a typical 'Imagine It' topic, but I wasn't sure where to post it otherwise and I did see some legal-related topics in this section.
So let's imagine, that you need to communicate with Business Partners of whome you do initially receive an email address to communicate with about business/relationship relevant topics and sometimes even legally-required information, such as product updates or portfolio phase ins/outs. However, at some point you find that this email address is not valid/used anymore and you do actually have another email address for that Business Partner contact.
But that business partner contact has not opted-in/subscribed using that email address.
Are you allowed to use that other (valid, but not opted-in) email address for your business partner relevant communications?
I am in doubt, because there is no specific opt-in for that new email address, but I think most laws do allow e-mail sending if there is an existing business relationship and the content of the email is relevant to that relationship.
Best regards
Roger