diff --git a/modules/mailserver/dovecot.nix b/modules/mailserver/dovecot.nix
index 0207069..feb3151 100644
--- a/modules/mailserver/dovecot.nix
+++ b/modules/mailserver/dovecot.nix
@@ -17,6 +17,7 @@ lib.mkIf cfg.enable {
 
     enableLmtp = true;
     enablePAM = false;
+    protocols = [ "sieve" ];
 
     mailUser = "vmail";
     mailGroup = "vmail";
@@ -95,6 +96,7 @@ lib.mkIf cfg.enable {
 
       plugin {
         sieve_plugins = sieve_imapsieve sieve_extprograms
+        sieve = file:/var/lib/sieve/%d/%n/scripts;active=/var/lib/sieve/%d/%n/active.sieve
 
         ${lib.optionalString cfg.spam.enable ''
         imapsieve_mailbox1_name = Spam
@@ -110,6 +112,12 @@ lib.mkIf cfg.enable {
 
         sieve_global_extensions = +vnd.dovecot.pipe
       }
+
+      service managesieve-login {
+        inet_listener sieve {
+          port = 4190
+        }
+      }
     '';
   };
   systemd.services.dovecot2 = {
@@ -147,6 +155,7 @@ lib.mkIf cfg.enable {
   networking.firewall.allowedTCPPorts = [
     143 # IMAP
     993 # IMAP (implicit TLS)
+    4190 # ManageSieve
   ];
 
   security.acme.certs."${cfg.fqdn}".postRun = ''
diff --git a/users/simon/modules/programs.nix b/users/simon/modules/programs.nix
index 3aeb742..6863ed6 100644
--- a/users/simon/modules/programs.nix
+++ b/users/simon/modules/programs.nix
@@ -134,6 +134,7 @@ in
     hunspellDicts.de-de
     hunspellDicts.en-gb-ise # dictionary
     libreoffice # office suite
+    libsForQt5.pim-sieve-editor # sieve editor
     xournalpp # notebook
 
     # tools