diff --git a/applications/email.nix b/applications/email.nix
index 0e39139..6633970 100644
--- a/applications/email.nix
+++ b/applications/email.nix
@@ -410,6 +410,9 @@ in {
       '';
     };
 
+    # for https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/issues/275
+    services.dovecot2.sieve.extensions = ["fileinto"];
+
     mailserver = {
       enable = true;
       fqdn = "${cfg.sub}.${cfg.domain}";