It fits poorly with limited amount of checks that are (and will be)
implemented in maddy.
Advanced filtering that requires "spam score" logic should be performed
by external software such as rspamd. At this point duplicating that
logic in maddy makes no sense, since it is highly problematic to
integrate it with external software.
New name more precisely describes what it is doing now. It was initally
meant to be more generic and usable for other purposes, but I don't
think we will need that flexibility.
