Thanks for the info we currently have a smart list filtering with the knowns. However, it is becoming a big unmanageable due to hard bounces that we have unbounced so now rather than known is has to filter for those that were previously known but now are labeled with “1” or “2”, etc. Same applies with opt-outs. While they were previously “known” and opt back in they’re opt-out field like the bounce field now has another value.