diff --git a/hosts/sid/services/mailserver.nix b/hosts/sid/services/mailserver.nix
index bd6e73f..caa2b9f 100644
--- a/hosts/sid/services/mailserver.nix
+++ b/hosts/sid/services/mailserver.nix
@@ -6,7 +6,6 @@
   mailserver = {
     enable = true;
     stateVersion = 3;
-    localDnsResolver = false; # use coredns
     accounts = {
       sid = {
         aliases = [ "postmaster" ];