diff --git a/test/docker_mail/templates/mailu/overrides/postfix/postfix.cf b/test/docker_mail/templates/mailu/overrides/postfix/postfix.cf
index d7467a21a59d28eb3e6d3e922c388017abc43376..1cf807644338815f55db80688c85cc50c461e717 100644
--- a/test/docker_mail/templates/mailu/overrides/postfix/postfix.cf
+++ b/test/docker_mail/templates/mailu/overrides/postfix/postfix.cf
@@ -10,4 +10,4 @@ transport_maps =
 
 # Wert aus main.cf übernommen und ergänzt 
 relay_domains = 
-  regexp:/opt/mailman/postfix_domains
+ regexp:/opt/mailman/postfix_domains