diff --git a/README.md b/README.md
index 60d5d58..81e919f 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ The configuration was tested with a standard Debian sid and Ubuntu 16.04 LTS ins
 
 Uninstall packages that may interfere with this setup:
 ```
-apt-get purge apache2* resolvconf
+apt-get purge apache2* resolvconf exim4*
 ```
 
 If you are on Ubuntu, add the following PPA: