Update esb.json

domains/esb.json

@@ -8,7 +8,13 @@
             "89.106.200.1"
         ],
         "TXT": [
-            "zoho-verification=zb54408053.zmverify.zoho.in"
+            "zoho-verification=zb54408053.zmverify.zoho.in",
+            "v=spf1 include:zohomail.in ~all"
+        ],
+        "MX": [
+            "mx.zoho.in",
+            "mx2.zoho.in",
+            "mx3.zoho.in"
         ]
     }
 }