diff --git a/domains/mail.zvdxc.json b/domains/mail.zvdxc.json
index e8a7c668c..fcb327e41 100644
--- a/domains/mail.zvdxc.json
+++ b/domains/mail.zvdxc.json
@@ -8,6 +8,7 @@
     "MX": [
       "mx1.improvmx.com",
       "mx2.improvmx.com"
-    ]
+    ],
+    "TXT": "v=spf1 include:spf.improvmx.com ~all"
   }
 }