diff --git a/HowtoPostfix.md b/HowtoPostfix.md
index 55751a46..404965af 100644
--- a/HowtoPostfix.md
+++ b/HowtoPostfix.md
@@ -857,7 +857,7 @@ RCPT TO: <foo@example.org>
 DATA
 From: <noreply@example.com>
 To: Foo <foo@example.org>
-Subject: test DKIM
+Subject: test
 
 Ceci est un test
 .