diff --git a/roles/mailserver_dovecot/tasks/main.yml b/roles/mailserver_dovecot/tasks/main.yml
index 6ad9c60..df16fd3 100644
--- a/roles/mailserver_dovecot/tasks/main.yml
+++ b/roles/mailserver_dovecot/tasks/main.yml
@@ -117,3 +117,12 @@
     owner: root
     group: root
     mode: "640"
+
+- name: Add sieve plugin
+  become: true
+  ansible.builtin.lineinfile:
+    path: /etc/dovecot/conf.d/20-lmtp.conf
+    regexp: '^(\s*)#?mail_plugins =.*'
+    backrefs: true
+    line: '\1mail_plugins = $mail_plugins sieve'
+  notify: Reload dovecot service