diff --git a/config/_default/params.toml b/config/_default/params.toml
index 9da8426..c3c0bae 100644
--- a/config/_default/params.toml
+++ b/config/_default/params.toml
@@ -26,6 +26,9 @@ highlightCurrentMenuArea = true
 smartTOC = true
 smartTOCHideUnfocusedChildren = false
 
+# show mail address for replies
+replyByEmail = true
+
 [header]
   layout = "fixed" # valid options: basic, fixed, fixed-fill, fixed-gradient, fixed-fill-blur