diff --git a/Build/lib/is-domain-alive.ts b/Build/lib/is-domain-alive.ts
index 6b572146..1e2a446a 100644
--- a/Build/lib/is-domain-alive.ts
+++ b/Build/lib/is-domain-alive.ts
@@ -19,7 +19,7 @@ const dnsServers = [
   'dns10.quad9.net', // Quad9 unfiltered
   'doh.sandbox.opendns.com', // OpenDNS sandbox (unfiltered)
   'unfiltered.adguard-dns.com',
-  'v.recipes', // Proxy Cloudflare
+  // 'v.recipes', // Proxy Cloudflare, too many HTTP 503
   // '76.76.2.0', // ControlD unfiltered, path not /dns-query
   // '76.76.10.0', // ControlD unfiltered, path not /dns-query
   // 'dns.bebasid.com', // BebasID, path not /dns-query but /unfiltered
@@ -30,13 +30,13 @@ const dnsServers = [
   'anycast.dns.nextdns.io',
   'wikimedia-dns.org',
   // 'ordns.he.net',
-  'dns.mullvad.net',
+  // 'dns.mullvad.net', empty HTTP body a lot
   'basic.rethinkdns.com',
   'dns.surfsharkdns.com',
   'private.canadianshield.cira.ca',
-  'unfiltered.joindns4.eu',
+  // 'unfiltered.joindns4.eu', // too many ECONNRESET on GitHub Actions
   'public.dns.iij.jp',
-  'common.dot.dns.yandex.net',
+  // 'common.dot.dns.yandex.net', // too many ECONNRESET on GitHub Actions
   'safeservedns.com' // NameCheap DNS, supports DoT, DoH, UDP53
   // 'ada.openbld.net',
   // 'dns.rabbitdns.org'