support domain key records

tests/validations.test.js

@@ -68,6 +68,7 @@ describe('validateDomainData', () => {
     { ...defaultDomain, name: '_acme-challenge' },
     { ...defaultDomain, name: '_dmarc' },
     { ...defaultDomain, name: '_gh-is-a-dev' },
+    { ...defaultDomain, name: '_domainkey' },
   ];
 
   const validCases = [
@@ -104,6 +105,8 @@ describe('validateDomainData', () => {
     { ...defaultDomain, name: '_gh-phenax.akshay' },
     { ...defaultDomain, name: '_gh-hello01-ga' },
     { ...defaultDomain, name: '_gh-hello01_ga' },
+    { ...defaultDomain, name: '_domainkey.subdomain' },
+    { ...defaultDomain, name: 'mx._domainkey.subdomain' },
   ];
 
   it('should return false for invalid data', () => {

utils/invalid-domains.json

@@ -2,6 +2,7 @@
   "_acme-challenge",
   "_discord",
   "_dmarc",
+  "_domainkey",
   "_gh-is-a-dev",
   "_github-challenge-is-a-dev",
   "_github-pages-challenge-is-a-dev",

utils/validations.js

@@ -42,6 +42,7 @@ const extraSupportedNames = [
   R.equals('_gitlab-pages-verification-code'),
   R.equals('_acme-challenge'),
   R.equals('_dmarc'),
+  R.equals('_domainkey'),
   testRegex(/^_gh-[a-z0-9-_]+$/i), // Exception for the new github org verification records
 ]