Update send.misu.json

domains/send.misu.json

@@ -4,7 +4,12 @@
         "email": "mishucon@pm.me"
     },
     "records": {
-        "MX": "feedback-smtp.us-east-1.amazonses.com",
+        "MX": [
+          {
+              "target": "feedback-smtp.us-east-1.amazonses.com",
+              "priority": 10 
+          }
+        ],
         "TXT": "v=spf1 include:amazonses.com ~all"
     }
 }