Modify DNS records in dag.json

Updated TXT records for email verification and added MX records.

domains/dag.json

@@ -5,6 +5,23 @@
     },
     "records": {
         "CNAME": "daglaroglou.github.io",
-        "TXT": ["zoho-verification=zb43503961.zmverify.zoho.eu"]
+        "TXT": [
+            "v=spf1 include:zohomail.eu ~all",
+            ""
+        ],
+    "MX": [
+        {
+          "target": "mx.zoho.eu",
+          "priority": 10
+        },
+        {
+          "target": "mx2.zoho.eu",
+          "priority": 20
+        },
+        {
+          "target": "mx3.zoho.eu",
+          "priority": 50
+        }
+      ]
     }
 }