diff --git a/postfix/tasks/mta-sts.yml b/postfix/tasks/mta-sts.yml
index 7f87546125fa26afaa4fdc235de507a8b3a105c1..1db5eef237e2ded25f3d9e0a2b40e5a6f29ff954 100644
--- a/postfix/tasks/mta-sts.yml
+++ b/postfix/tasks/mta-sts.yml
@@ -72,3 +72,4 @@
     name: postfix-mta-sts-resolver
     enabled: "{{ postfix_enable_mta_sts|string }}"
     state: "{{ 'started' if postfix_enable_mta_sts else 'stopped' }}"
+  when: postfix_enable_mta_sts