diff --git a/tasks/configure.yml b/tasks/configure.yml
index a079220..4c1d8c0 100644
--- a/tasks/configure.yml
+++ b/tasks/configure.yml
@@ -210,6 +210,7 @@
 
 - name: Ensure postfix belongs to sasl group
   user:
+    name: postfix
     append: true
     groups:
       - sasl