In BO 4.2, User A can set a destination email address in a publication for User B. Once scheduled, the email is sent to User B, regardless of whether User A or B has a subscription to the publication. But when I do the same in BO4.3, User B won't receive any email until User A (or B) subscribes the publication. Is this a setting or did this change in BO4.3?

I tested with placeholders or named addresses. In the end, BO 4.3 isn't sending anything to anyone without subscribtion.
Thanks for helping.