diff --git a/nixos/modules/programs/ssmtp.nix b/nixos/modules/programs/ssmtp.nix
index 0e060e3f522..e45748af205 100644
--- a/nixos/modules/programs/ssmtp.nix
+++ b/nixos/modules/programs/ssmtp.nix
@@ -8,18 +8,16 @@
 with lib;
 
 let
-
-  cfg = config.networking.defaultMailServer;
+  cfg = config.services.ssmtp;
 
 in
-
 {
 
   options = {
 
-    networking.defaultMailServer = {
+    services.ssmtp = {
 
-      directDelivery = mkOption {
+      enable = mkOption {
         type = types.bool;
         default = false;
         description = ''
@@ -29,7 +27,7 @@ in
           <command>sendmail</command> or <command>postfix</command> on
           your machine, set this option to <literal>true</literal>, and
           set the option
-          <option>networking.defaultMailServer.hostName</option> to the
+          <option>services.ssmtp.hostName</option> to the
           host name of your preferred mail server.
         '';
       };
@@ -129,9 +127,9 @@ in
   };
 
 
-  config = mkIf cfg.directDelivery {
+  config = mkIf cfg.enable {
 
-    networking.defaultMailServer.authPassFile = mkIf (cfg.authPass != "")
+    services.ssmtp.authPassFile = mkIf (cfg.authPass != "")
       (mkDefault (toString (pkgs.writeTextFile {
         name = "ssmtp-authpass";
         text = cfg.authPass;
diff --git a/nixos/modules/rename.nix b/nixos/modules/rename.nix
index d4bce3b49d3..e392fef54dd 100644
--- a/nixos/modules/rename.nix
+++ b/nixos/modules/rename.nix
@@ -11,6 +11,8 @@ with lib;
     (mkRenamedOptionModule [ "networking" "enableRTL8192cFirmware" ] [ "hardware" "enableRedistributableFirmware" ])
     (mkRenamedOptionModule [ "networking" "networkmanager" "useDnsmasq" ] [ "networking" "networkmanager" "dns" ])
     (mkRenamedOptionModule [ "networking" "connman" ] [ "services" "connman" ])
+    (mkRenamedOptionModule [ "networking" "defaultMailServer" ] [ "services" "ssmtp" ])
+    (mkRenamedOptionModule [ "services" "ssmtp" "directDelivery" ] [ "services" "ssmtp" "enable" ])
     (mkChangedOptionModule [ "services" "printing" "gutenprint" ] [ "services" "printing" "drivers" ]
       (config:
         let enabled = getAttrFromPath [ "services" "printing" "gutenprint" ] config;
diff --git a/nixos/tests/mailcatcher.nix b/nixos/tests/mailcatcher.nix
index d45b5d4edfc..eb5b606ecc8 100644
--- a/nixos/tests/mailcatcher.nix
+++ b/nixos/tests/mailcatcher.nix
@@ -9,8 +9,8 @@ import ./make-test.nix ({ lib, ... }:
     {
       services.mailcatcher.enable = true;
 
-      networking.defaultMailServer.directDelivery = true;
-      networking.defaultMailServer.hostName = "localhost:1025";
+      services.ssmtp.enable = true;
+      services.ssmtp.hostName = "localhost:1025";
 
       environment.systemPackages = [ pkgs.mailutils ];
     };