diff --git a/configs/gui.nix b/configs/gui.nix
index d98f4f3..528e1e3 100644
--- a/configs/gui.nix
+++ b/configs/gui.nix
@@ -14,6 +14,7 @@
     mumble
     libreoffice-fresh
     slack
+    thunderbird
     zoom-us
   ];
   programs.firefox = {
@@ -23,7 +24,6 @@
       ublock-origin
       umatrix
       cookie-autodelete
-      dark-night-mode
     ];
   };
 
diff --git a/configs/network.nix b/configs/network.nix
index 54a37c6..20123e7 100644
--- a/configs/network.nix
+++ b/configs/network.nix
@@ -3,4 +3,12 @@
   networking.hosts = {
     "127.0.0.1" = [ "localhost" "local.ted.europa.eu" ];
   };
+  services.davmail = {
+    enable = true;
+    url = "https://webmail.arhs-developments.com/owa/";
+    config = {
+      davmail.mode = "EWS";
+      davmail.allowRemote = false;
+    };
+  };
 }