Postfix拒否＋DMARC認証失敗レポート（過去7日）
## Postfix拒否理由（上位）
450 4.7.1 Client host rejected: cannot find your reverse hostname, [196.251.73.43] (1件)
450 4.7.1 Client host rejected: cannot find your reverse hostname, [196.251.92.61] (1件)
450 4.7.1 Client host rejected: cannot find your reverse hostname, [196.251.86.194] (1件)
450 4.7.1 Client host rejected: cannot find your reverse hostname, [178.16.52.30] (1件)
450 4.7.1 Client host rejected: cannot find your reverse hostname, [144.31.194.177] (1件)
554 5.7.1 Service unavailable (1件)
## 拒否IPアドレス（上位）
178.16.52.30 (1件)
196.251.86.194 (1件)
196.251.92.61 (1件)
198.51.100.99 (1件)
196.251.73.43 (1件)
144.31.194.177 (1件)
## DMARC認証失敗の送信元は検出されませんでした。
