diff --git a/Readme.md b/Readme.md
index c06afbeb7fd01991da2f32a9385d67df7a09b742..ced120309144f0560441888aaf791439638d3be7 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,10 +1,16 @@
 # check-mk-postfix-logstats
 
-This is a fairly simple plugin for linux check_mk agents which parses your postfix logfile and returns a bunch of numbers.
+This is a fairly simple plugin for linux Check_MK agents which parses your postfix logfile and returns a bunch of numbers.
+It might not perform ideal, feel free to adapt and improve.
 
-# Installation
+## Installation
+
+Please note that this script needs permission to read your postfix log (`/var/log/mail.info` on Debian).
+So give it appropriate permissions.
 
 * Clone this repository into e.g. `/opt/check-mk-postfix-stats`.
 * Edit the `settings.sh` (There is not much to do)
 * Symlink `postfix-stats.sh` to `/usr/lib/check_mk_agent/plugins`
+* Go into your Check_MK installation and monitor the new service
 
+That's about it.