diff --git a/config/application-example.yml b/config/application-example.yml
index f8cb0f26e..f6f18315e 100644
--- a/config/application-example.yml
+++ b/config/application-example.yml
@@ -22,9 +22,13 @@ smtp_enable_starttls_auto: 'true' # 'false'
 # If your mail server requires authentication, please change.
 smtp_authentication: 'plain' # 'plain', 'login', 'cram_md5'
 registrant_url: 'https:/registrant.example.com' # for valid email body registrant links
+# Staging env does not send any emails unless they are whitelisted 
 whitelist_emails_for_staging: >
-  test@example.org, old@example.org,
-  new@example.org, old@example.com, new@example.com
+  test@example.org, 
+  old@example.org,
+  new@example.org, 
+  old@example.com, 
+  new@example.com
 
 #
 # ADMIN server
diff --git a/doc/application_build_doc.md b/doc/application_build_doc.md
index 800e014b9..4dc9535b4 100644
--- a/doc/application_build_doc.md
+++ b/doc/application_build_doc.md
@@ -127,3 +127,10 @@ Crontab can be setup after deploy. Jobs can be viewed [here](/config/schedule.rb
 Zonefile procedure must be set up in server after deploy. The same command must be run whenever procedure is updated (see changelog).
 
     bundle exec rake zonefile:replace_procedure
+
+
+### Application settings
+
+Application settings locate at [config/application-example.yml](/config/application-example.yml)
+
+