diff --git a/en_US/howto/pipe.incoming.email.for.certain.user.to.external.script.md b/en_US/howto/pipe.incoming.email.for.certain.user.to.external.script.md
index 9525d5c1..c24e7767 100644
--- a/en_US/howto/pipe.incoming.email.for.certain.user.to.external.script.md
+++ b/en_US/howto/pipe.incoming.email.for.certain.user.to.external.script.md
@@ -10,7 +10,7 @@ config file `/etc/postfix/master.cf`:
 
 ```
 external-pipe   unix    -   n   n   -   -   pipe
-    flags= user=vmail:vmail argv=/path/to/your/external/script.sh
+    flags=DRhu user=vmail:vmail argv=/path/to/your/external/script.sh
 ```
 
 __Note__:
diff --git a/html/pipe.incoming.email.for.certain.user.to.external.script.html b/html/pipe.incoming.email.for.certain.user.to.external.script.html
index b79caac6..e6277766 100644
--- a/html/pipe.incoming.email.for.certain.user.to.external.script.html
+++ b/html/pipe.incoming.email.for.certain.user.to.external.script.html
@@ -17,7 +17,7 @@
 as Postfix transport program. Please add below line at the bottom of Postfix
 config file <code>/etc/postfix/master.cf</code>:</p>
 <pre><code>external-pipe   unix    -   n   n   -   -   pipe
-    flags= user=vmail:vmail argv=/path/to/your/external/script.sh
+    flags=DRhu user=vmail:vmail argv=/path/to/your/external/script.sh
 </code></pre>
 
 <p><strong>Note</strong>:</p>