diff --git a/tests/validations.test.js b/tests/validations.test.js
index 224e244aa..6f71fb55f 100644
--- a/tests/validations.test.js
+++ b/tests/validations.test.js
@@ -87,6 +87,7 @@ describe("validateDomainData", () => {
         { ...defaultDomain, name: "_dmarc" },
         { ...defaultDomain, name: "_gh-is-a-dev" },
         { ...defaultDomain, name: "_domainkey" },
+        { ...defaultDomain, name: "_improvmx" },
     ];
 
     const validCases = [
@@ -141,6 +142,7 @@ describe("validateDomainData", () => {
         { ...defaultDomain, name: "_gh-hello01_ga" },
         { ...defaultDomain, name: "_domainkey.subdomain" },
         { ...defaultDomain, name: "mx._domainkey.subdomain" },
+        { ...defaultDomain, name: '_improvmx.subdomain' },
         { ...defaultDomain, name: "a.b" },
     ];
 
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",
diff --git a/utils/validations.js b/utils/validations.js
index 2facda7fa..51f242b8b 100644
--- a/utils/validations.js
+++ b/utils/validations.js
@@ -59,6 +59,7 @@ const extraSupportedNames = [
     R.equals("_acme-challenge"),
     R.equals("_dmarc"),
     R.equals("_domainkey"),
+    R.equals("_improvmx"),
     testRegex(/^_gh-[a-z0-9-_]+$/i),
 ];