diff --git a/templates/postfix/main.cf.j2 b/templates/postfix/main.cf.j2
index 0c9da12..2e1cb92 100644
--- a/templates/postfix/main.cf.j2
+++ b/templates/postfix/main.cf.j2
@@ -356,8 +356,5 @@ proxy_read_maps =
 
 {% if postfix_authorized_submit_users is defined %}
 # Allow/ prevent sendmail delivery for specific users
-authorized_submit_users =
-{% for map in postfix_authorized_submit_users %}
-    {{ map }}
-{% endfor %}
+authorized_submit_users = {{ postfix_authorized_submit_users | join(', ') }}
 {% endif %}