Update piyushrb.json

domains/piyushrb.json

@@ -4,6 +4,6 @@
         "email": "urpiyush39@gmail.com"
     },
     "record": {
-        "MX": ["free1.googiehost.com"]
+        "MX": ["free1.googiehost.com", "free2.googiehost.com", "free3.googiehost.com", "free4.googiehost.com"]
     }
 }