diff --git a/domains/shept.json b/domains/shept.json
index 4f88ab9d0..df8b6e158 100644
--- a/domains/shept.json
+++ b/domains/shept.json
@@ -10,7 +10,10 @@
             "185.199.110.153",
             "185.199.111.153"
         ],
-        "MX": ["mail.is-a.dev"],
-        "TXT": "v=spf1 mx a:mail.is-a.dev ~all"
+         "MX": [
+            "mx1.improvmx.com",
+            "mx2.improvmx.com"
+        ],
+        "TXT": "v=spf1 include:spf.improvmx.com ~all"
     }
 }