diff --git a/services/monitoring-munin.nix b/services/monitoring-munin.nix
index 7bd5f3f..ffb831a 100644
--- a/services/monitoring-munin.nix
+++ b/services/monitoring-munin.nix
@@ -27,6 +27,10 @@ mkIf true {
     path = with pkgs; [ munin lm_sensors ];
     serviceConfig.TimeoutStartSec = "3min";
   };
+  users.extraUsers.munin = {
+    #extraGroups = [ "postfix" "root" ];
+    extraGroups = [ "postfix" ];
+  };
 
   ## Munin server -- generate /var/www/munin
   services.munin-cron = {