diff --git a/mail-server/dovecot.nix b/mail-server/dovecot.nix
index fc525c8..6c54ca8 100644
--- a/mail-server/dovecot.nix
+++ b/mail-server/dovecot.nix
@@ -38,8 +38,23 @@ in
       sslServerKey = keyPath;
       enableLmtp = true;
       modules = [ pkgs.dovecot_pigeonhole ];
+      protocols = [ "sieve" ];
+
+      sieveScripts = {
+        before = builtins.toFile "spam.sieve"
+            ''
+            require "fileinto";
+
+            if header :is "X-Spam" "Yes" {
+                fileinto "Junk";
+                stop;
+            }
+            '';
+      };
+
       extraConfig = ''
         #Extra Config
+        #mail_debug = yes
         mail_access_groups = ${vmailGroupName}
         ssl = required
 
@@ -51,6 +66,10 @@ in
         }
         }
 
+        protocol lmtp {
+        mail_plugins = $mail_plugins sieve
+        }
+
         service auth {
         unix_listener /var/lib/postfix/queue/private/auth {
         mode = 0660