diff --git a/config/configuration.yml.example b/config/configuration.yml.example
index 5b029cd56..ed9a19471 100644
--- a/config/configuration.yml.example
+++ b/config/configuration.yml.example
@@ -62,6 +62,7 @@
 #     delivery_method: :smtp
 #     smtp_settings:
 #       tls: true
+#       enable_starttls_auto: true
 #       address: "smtp.gmail.com"
 #       port: 587
 #       domain: "smtp.gmail.com" # 'your.domain.com' for GoogleApps