diff --git a/HowtoPostfix.md b/HowtoPostfix.md
index 3ef814a3..c93e7eb4 100644
--- a/HowtoPostfix.md
+++ b/HowtoPostfix.md
@@ -281,8 +281,8 @@ Exemples pratiques :
 On pourra utiliser ces commandes sur des ensembles de messages via des scripts du type :
 
 ~~~
-# mailq | tail -n +2 | awk 'BEGIN { RS = "" } /user@example\.com$/ { print $1 }' | tr -d '*!' | postsuper -h -
-# mailq | tail -n +2 | awk 'BEGIN { RS = "" } /example\.com$/ { print $1 }' | tr -d '*!' | postsuper -d -
+# mailq | awk '/^[0-9A-Z]+/&&/sender@example\.com$/{print $1}' | tr -d '*!' | postsuper -h -
+# mailq | awk '/^[0-9A-Z]+/&&/example\.com$/{print $1}' | tr -d '*!' | postsuper -d -
 # mailq > mailq.log ; for var in $(grep <from@example.com> mailq.log | cut -b '1-12'); do postsuper -d $var; done
 ~~~