I am creating a filtered list in Mobile Connect contact builder, and there doesn't seem to be a way to filter by opt-in status (I assume because it's pulling from all contacts) . With that in mind, the filtered list I create ends up including people who aren't actively opted-in.
My question is: will SFMC Mobile Connect exclude anybody in that list who isn't opted-in at the time of send, or will it force a send to all contacts in the list (even if they aren't opted-in)?