diff --git a/environments/sample/hosts/servers/default.nix b/environments/sample/hosts/servers/default.nix
index a50502a..1265455 100644
--- a/environments/sample/hosts/servers/default.nix
+++ b/environments/sample/hosts/servers/default.nix
@@ -2,13 +2,13 @@
 
 let
   # Import environment-specific network parameters
-  env = import ../../../network { };
+  env = import ../../../../network { };
 in {
-  # Common settings for all servers in the sample environment
+  # Common settings for all servers in the production environment
   # This file is imported by all server configurations
 
   # Default DNS servers for this environment
-  networking.nameServers = [ "10.40.128.10" ];
+  networking.nameServers = [ "10.40.128.10" "10.40.128.11" ];
 
   # SMTP relay configuration
   services.postfix = {
@@ -16,12 +16,15 @@ in {
     relayHost = "smtp.lagraula.fr";
     relayPort = 587;
     useTLS = true;
-    fromAddress = "noreply@sample.lagraula.fr";
+    fromAddress = "noreply@prod.lagraula.fr";
   };
 
   # Proxy configuration for servers (none for now)
   environment.systemPackages = with pkgs; [ ];
 
+  # Locale for servers (English)
+  i18n.defaultLocale = "en_US.UTF-8";
+
   # TODO: Move other common server settings here later
   # Examples:
   # - Server-specific users/groups
@@ -29,5 +32,4 @@ in {
   # - Server-specific services
   # - Server-specific security policies
   # - Server-specific monitoring/alerting
-  # - Locale: en_US.UTF-8 (for servers)
-}
+}
\ No newline at end of file
diff --git a/environments/sample/hosts/dns01/configuration.nix b/environments/sample/hosts/servers/dns01/configuration.nix
similarity index 100%
rename from environments/sample/hosts/dns01/configuration.nix
rename to environments/sample/hosts/servers/dns01/configuration.nix
diff --git a/environments/sample/hosts/workstations/default.nix b/environments/sample/hosts/workstations/default.nix
index f6e2324..590a179 100644
--- a/environments/sample/hosts/workstations/default.nix
+++ b/environments/sample/hosts/workstations/default.nix
@@ -2,13 +2,13 @@
 
 let
   # Import environment-specific network parameters
-  env = import ../../../network { };
+  env = import ../../../../network { };
 in {
-  # Common settings for all workstations in the sample environment
+  # Common settings for all workstations in the production environment
   # This file is imported by all workstation configurations
 
   # Default DNS servers for this environment
-  networking.nameServers = [ "10.40.128.10" ];
+  networking.nameServers = [ "10.40.128.10" "10.40.128.11" ];
 
   # SMTP relay configuration
   services.postfix = {
@@ -16,7 +16,7 @@ in {
     relayHost = "smtp.lagraula.fr";
     relayPort = 587;
     useTLS = true;
-    fromAddress = "noreply@sample.lagraula.fr";
+    fromAddress = "noreply@prod.lagraula.fr";
   };
 
   # Proxy configuration for workstations (none for now)
@@ -32,4 +32,4 @@ in {
   # - Workstation-specific services
   # - Workstation-specific security policies
   # - Workstation-specific monitoring/alerting
-}
+}
\ No newline at end of file