diff --git a/README.md b/README.md
index 478206e..df1c9c4 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,14 @@
 ## Docker container for [atech/postal](https://github.com/atech/postal)
 
 ### Instructions
-Change configuration in docker-compose.yml to update passwords for MySQL/RabbitMQ
+Change configuration in docker-compose.yml to update passwords for MySQL/RabbitMQ.
+Both passwords in the `postal` service, `mysql` service and `rabbitmq` service have to be changed.
 
 ```
 docker-compose up -d
 ```
 ### Configuration
-Configuration is located at data/postal/config after the first start.
+Configuration is located at data/postal after the first start. Note that non-config files (i.e. files in https://github.com/atech/postal/tree/master/config) will be overwritten each time the container starts up.
+Be sure to do some port mappings to allow your SMTP server and HTTP(s) server to be accessed. I suggest simply port mapping the SMTP server and using [jwilder/nginx-proxy](https://github.com/jwilder/nginx-proxy) to proxy the HTTP server.
 
 Still WIP