diff --git a/README.md b/README.md
index b831832..3f7cc1c 100644
--- a/README.md
+++ b/README.md
@@ -137,7 +137,7 @@ postfix_summary.sh -d "Mar 27"
 Search across all logs without date filtering:
 
 ```bash
-postfix_summary.sh -d ""
+postfix_summary.sh -f "example@domain.com" -d ""
 ```
 
 ---