diff --git a/domains/block.json b/domains/block.json
index dc3827c88..2ed61d8bf 100644
--- a/domains/block.json
+++ b/domains/block.json
@@ -5,7 +5,7 @@
     },
     "record": {
         "A": ["217.174.245.249"],
-        "MX": ["hosts.is-a.dev"],
-        "TXT": "v=spf1 a mx ip4:217.174.245.249 ~all"
+        "MX": ["mail.is-a.dev"],
+        "TXT": "v=spf1 mx a:mail.is-a.dev ~all"
     }
-}
\ No newline at end of file
+}