diff --git a/domains/white.json b/domains/white.json
index 486760db16..e9c7346557 100644
--- a/domains/white.json
+++ b/domains/white.json
@@ -12,8 +12,8 @@
       "185.199.111.153"
     ],
     "MX": [
-      "://improvmx.com",
-      "://improvmx.com"
+      "mx1.improvmx.com",
+      "mx2.improvmx.com"
     ],
     "TXT": [
       "v=spf1 include:://improvmx.com ~all",