Update dean.json with MX and additional TXT records

Added MX records and updated TXT records for domain.

domains/dean.json

@@ -1,10 +1,27 @@
 {
-  "owner": {
-    "username": "dandepan303",
-    "email": "dandepan303@gmail.com"
-  },
-  "records": {
-    "A": ["216.198.79.1"],
-    "TXT": ["zoho-verification=zb71692059.zmverify.zoho.com"]
+    "owner": {
+      "username": "dandepan303",
+      "email": "dandepan303@gmail.com"
+    },
+    "records": {
+      "A": ["216.198.79.1"],
+      "TXT": [
+        "zoho-verification=zb71692059.zmverify.zoho.com",
+        "v=spf1 include:zohomail.com ~all"
+      ],
+      "MX": [
+        {
+          "target": "mx.zoho.com",
+          "priority": 10
+        },
+        {
+          "target": "mx2.zoho.com",
+          "priority": 20
+        },
+        {
+          "target": "mx3.zoho.com",
+          "priority": 50
+        }
+      ]
+    }
   }
-}