diff --git a/README.md b/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..108682f5b5b6115c764b9ff5126ac8182f117c67
--- /dev/null
+++ b/README.md
@@ -0,0 +1,18 @@
+# postfix-nullclient-formula
+
+This is a simple collection of states that replace default exim4 with a postfix installation that acts as a nullclient.
+Throw it onto your machine and it will submit mails easily.
+
+Two things are configurable using pillar:
+
+* relayhost (which server to use for submitting emails)
+* rootmail-destination (which address to forward mail for local users to)
+
+# pillar example
+
+```
+postfix:
+  nullclient:
+    relayhost: 'smtp.hs-hannover.de'
+    rootmail-destination: 'web-rootmails@hs-hannover.de'
+```
diff --git a/pillar.example b/pillar.example
new file mode 100644
index 0000000000000000000000000000000000000000..ff6628dcd973abd902af548111dbd9d1f6a0cf1a
--- /dev/null
+++ b/pillar.example
@@ -0,0 +1,4 @@
+postfix:
+  nullclient:
+    relayhost: 'smtp.example.com'
+    rootmail-destination: 'rootmails@example.com'
diff --git a/postfix/nullclient/etc/postfix/main.cf b/postfix/nullclient/etc/postfix/main.cf
index b6e51daa71a32db233743a7f8766c4c70bb74a60..041d5084ba3f4c902e5a0326646f4fb25b870e75 100644
--- a/postfix/nullclient/etc/postfix/main.cf
+++ b/postfix/nullclient/etc/postfix/main.cf
@@ -1,9 +1,11 @@
+### THIS FILE IS MANAGED BY SALT STATE `postfix.nullclient`
+### YOUR CHANGES WILL BE OVERWRITTEN!
 {% set minion_id = grains['id'] %}
 # Set compatibility level
 compatibility_level = 2
 
 myorigin = /etc/mailname
-smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
+smtpd_banner = $myhostname ESMTP $mail_name
 biff = no
 
 # appending .domain is the MUA's job.
@@ -26,7 +28,7 @@ smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 
 myhostname = {{ minion_id }}
 
-# Forward everything to the OTRS queue
+# Forward emails for local users to this address for easy collection
 alias_maps = static:web-rootmails@hs-hannover.de
 alias_database =
 local_recipient_maps = unix:passwd.byname