Add MX records (ImprovMX) so root subdomain has usable record

domains/ratmail4080.json

@@ -4,6 +4,10 @@
     "email": "aissalabandaseize@gmail.com"
   },
   "records": {
-    "TXT": "v=spf1 include:_spf.google.com ~all"
+    "TXT": "v=spf1 include:_spf.google.com ~all",
+    "MX": [
+      "mx1.improvmx.com",
+      "mx2.improvmx.com"
+    ]
   }
 }