Author: Sven Hartge <sven@svenhartge.de>
Description: Debian has exim in /usr/sbin which is not in the default path.

diff -Naurp netdata.orig/collectors/python.d.plugin/exim/exim.conf netdata/collectors/python.d.plugin/exim/exim.conf
--- netdata.orig/collectors/python.d.plugin/exim/exim.conf
+++ netdata/collectors/python.d.plugin/exim/exim.conf
@@ -88,4 +88,4 @@ update_every: 10
 # AUTO-DETECTION JOBS
 
 local:
-  command: 'exim -bpc'
+  command: '/usr/sbin/exim -bpc'