--- 20-lmtp.conf.orig	2016-07-05 01:15:31.000000000 +0200
+++ 20-lmtp.conf	2016-10-25 13:16:56.000000000 +0200
@@ -22,5 +22,7 @@
 
 protocol lmtp {
   # Space separated list of plugins to load (default is global mail_plugins).
-  #mail_plugins = $mail_plugins
+  mail_plugins = $mail_plugins sieve
+
+  postmaster_address = postmaster@jones.dk
 }