diff --git a/domains/cattopytheweb.json b/domains/cattopytheweb.json
index 903dc80ce4..3efddd7e19 100644
--- a/domains/cattopytheweb.json
+++ b/domains/cattopytheweb.json
@@ -7,5 +7,6 @@
     "URL": "https://cattopytheweb.github.io",
     "MX": ["mx1.improvmx.com", "mx2.improvmx.com"],
     "TXT": "v=spf1 include:spf.improvmx.com ~all"
+    "TXT": "mailbox=c8c6mtpk7xgykds645lxhj32"
   }
 }