> With this setting, mail will be ACCEPTED when the recipient
> address:
Sorry, that is incorrect.
Postfix features of the form "reject_<predicate>" cannot promise
that a recipient (or sender, client, helo) will be accepted when
their predicate is false.
They can't promise that, because there may be a different
"reject_<predicate>" instance whose predicate is true.
The only thing that a "reject_<predicate>" feature can promise is
that it will reject a recipient (or sender, etc) when the predicate
is true.
As that is why the text for reject_unlisted_recipient describes
under what conditions it will reject, not accept, a recipient.
Wietse