diff --git a/README.md b/README.md
index 6f1040b..a2b3f21 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # docker-postfix
-Simple Postfix SMTP TLS relay [docker](http://www.docker.com) image.
+Simple Postfix SMTP TLS relay [docker](http://www.docker.com) image with no local authentication enabled (to be run in a secure LAN). 
 
 ### Build instructions