diff --git a/utils/invalid-domains.json b/utils/invalid-domains.json
index c3ab5e2f8..1cba56e52 100644
--- a/utils/invalid-domains.json
+++ b/utils/invalid-domains.json
@@ -7,6 +7,7 @@
     "_github-challenge-is-a-dev",
     "_github-pages-challenge-is-a-dev",
     "_gitlab-pages-verification-code",
+    "_improvmx",
     "con",
     "help",
     "no-reply",