diff --git a/postwhite.conf b/postwhite.conf
index f87700e..94ccd03 100644
--- a/postwhite.conf
+++ b/postwhite.conf
@@ -13,6 +13,8 @@ yahoo_static_hosts=/usr/local/bin/postwhite/yahoo_static_hosts.txt
 # CUSTOM HOSTS
 # Enter custom hosts separated by a space, ex: "example.com example2.com example3.com"
 custom_hosts=""
+# Enter a file with hosts, one per line, ec: "/etc/good_domains.list"
+custom_hosts_file=""
 
 # Include list of Yahoo Outbound IPs from https://help.yahoo.com/kb/SLN23997.html?
 include_yahoo="yes"