./cleanup_milter: NOQUEUE: milter-header-filter: header X-SPAM-FLAG: NO from client_name[client_addr]; from=<sender> to=<recipient>: x:y:z
./cleanup_milter: NOQUEUE: milter-header-reject: header X-SPAM-FLAG: YES from client_name[client_addr]; from=<sender> to=<recipient>: 5.7.1 whatever
./cleanup_milter: errs = message content rejected