diff --git a/machines.nix b/machines.nix
index 97a41d3..61cc07c 100644
--- a/machines.nix
+++ b/machines.nix
@@ -69,7 +69,7 @@
 
       # roundcube webmail client
       # webmail.domain
-      # ./modules/nixos/roundcube.nix
+      ./modules/nixos/roundcube.nix
 
       # zulip chat client
       # chat.domain
diff --git a/modules/nixos/mailserver.nix b/modules/nixos/mailserver.nix
index 3ae01aa..a562ee9 100644
--- a/modules/nixos/mailserver.nix
+++ b/modules/nixos/mailserver.nix
@@ -28,4 +28,11 @@
     acceptTerms = true;
     defaults.email = "mtgmonket@gmail.com";
   };
+  environment.persistence."/persist" = {
+    directories = [
+      "/var/dkim"
+      "/var/vmail"
+      "/var/lib/redis-rspamd"
+    ];
+  };
 }