diff --git a/configuration.nix b/configuration.nix
index 95f2896..ea8c17b 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -67,6 +67,35 @@
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   '';
+  services.nginx.virtualHosts."lists.htw.stura-dresden.de" = {
+    enableACME = true;
+    forceSSL = true;
+    # locations."/" = {
+    #   proxyPass = "http://127.0.0.1:18507";
+    # };
+  };
+  services.mailman = {
+    enable = true;
+    hyperkitty = {
+      enable = true;
+    };
+    serve.enable=true;
+    webHosts = [
+      "lists.htw.stura-dresden.de"
+    ];
+  };
+
+  services.postfix.config.relay_domains = [
+    "hash:/var/lib/mailman/data/postfix_domains"
+  ];
+  services.postfix.config.transport_maps = [
+    "hash:/var/lib/mailman/data/postfix_lmtp"
+  ];
+  services.postfix.config.local_recipient_maps = [
+    "hash:/var/lib/mailman/data/postfix_lmtp"
+  ];
+
+  services.mailman.siteOwner = "mailman@htw.stura-dresden.de";
   mailserver = {
     enable = true;
     fqdn = "mail.htw.stura-dresden.de";
diff --git a/flake.lock b/flake.lock
index 46cf82f..4381b4d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -12,11 +12,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1740601740,
-        "narHash": "sha256-YQ8lMeT/KkMDavXrqPvoO6pKQdfSSAZBcNp/Cer4vWc=",
+        "lastModified": 1743172544,
+        "narHash": "sha256-I6//hyls5T6Y93IgwbWn5izeT29o+yza4yRgBcmNars=",
         "owner": "nix-community",
         "repo": "authentik-nix",
-        "rev": "bfcad34becd76d148e1ad537b5dcbd58d858a5bb",
+        "rev": "b4916a86d4e650401e67dc03556eadb4a3cb248a",
         "type": "github"
       },
       "original": {
@@ -28,16 +28,16 @@
     "authentik-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1740599692,
-        "narHash": "sha256-KZalpsM9rvki9GD+urf8idHOEnvBJtkSvE1b2b4KL/4=",
+        "lastModified": 1743169792,
+        "narHash": "sha256-aaSAlFIc5Gn5PJPVuObi24Y86/3N3yFJVQTx1tV2i2A=",
         "owner": "goauthentik",
         "repo": "authentik",
-        "rev": "31fe0e59234e487a42012510d1a4e4819b9aba26",
+        "rev": "748a8e560f2eb93f7ec15d6762d4e5931fc1fa2a",
         "type": "github"
       },
       "original": {
         "owner": "goauthentik",
-        "ref": "version/2025.2.1",
+        "ref": "version/2025.2.3",
         "repo": "authentik",
         "type": "github"
       }
@@ -137,15 +137,16 @@
         "nixpkgs-24_11": "nixpkgs-24_11"
       },
       "locked": {
-        "lastModified": 1740437053,
-        "narHash": "sha256-exPTta4qI1ka9sk+jPcLogGffJ1OVXnAsTRqpeAXeNw=",
+        "lastModified": 1734884447,
+        "narHash": "sha256-HA9fAmGNGf0cOYrhgoa+B6BxNVqGAYXfLyx8zIS0ZBY=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "c8ec4d5e432f5df4838eacd39c11828d23ce66ec",
+        "rev": "63209b1def2c9fc891ad271f474a3464a5833294",
         "type": "gitlab"
       },
       "original": {
         "owner": "simple-nixos-mailserver",
+        "ref": "nixos-24.11",
         "repo": "nixos-mailserver",
         "type": "gitlab"
       }
@@ -258,16 +259,16 @@
     },
     "nixpkgs_3": {
       "locked": {
-        "lastModified": 1741851582,
-        "narHash": "sha256-cPfs8qMccim2RBgtKGF+x9IBCduRvd/N5F4nYpU0TVE=",
+        "lastModified": 1743703532,
+        "narHash": "sha256-s1KLDALEeqy+ttrvqV3jx9mBZEvmthQErTVOAzbjHZs=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "6607cf789e541e7873d40d3a8f7815ea92204f32",
+        "rev": "bdb91860de2f719b57eef819b5617762f7120c70",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-unstable",
+        "ref": "nixos-24.11",
         "repo": "nixpkgs",
         "type": "github"
       }
diff --git a/flake.nix b/flake.nix
index f4c84dd..eabb115 100644
--- a/flake.nix
+++ b/flake.nix
@@ -10,11 +10,11 @@
   };
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
     authentik = {
       url = "github:nix-community/authentik-nix";
     };
-    mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver";
+    mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-24.11";
   };
 
   outputs = { self, nixpkgs, authentik, mailserver }: {