Fix MX target by removing trailing period

Removed the trailing period from the MX target.

domains/send.amit.json

@@ -7,11 +7,12 @@
     "MX": [
       {
         "priority": 10,
-        "target": "feedback-smtp.ap-northeast-1.amazonses.com."
+        "target": "feedback-smtp.ap-northeast-1.amazonses.com"
       }
     ],
     "TXT": [
       "v=spf1 include:amazonses.com ~all"
     ]
-  }
+  },
+  "proxied": true
 }