diff --git a/mastus/mail.nix b/mastus/mail.nix
index b8ebd0b..915f27c 100644
--- a/mastus/mail.nix
+++ b/mastus/mail.nix
@@ -57,4 +57,9 @@
       fi
     '';
   };
+
+  environment.systemPackages = with pkgs; [
+    spamassassin
+    procmail
+  ];
 }