diff --git a/data/conf/postfix/anonymize_headers.pcre b/data/conf/postfix/anonymize_headers.pcre
index a7ccd8af..d1ad005d 100644
--- a/data/conf/postfix/anonymize_headers.pcre
+++ b/data/conf/postfix/anonymize_headers.pcre
@@ -1,4 +1,4 @@
-#if /^\s*Received:.*Authenticated sender.*\(Postcow\)/
+if /^\s*Received:.*Authenticated sender.*\(Postcow\)/
 /^\s*Received:.*Authenticated sender:(.+)/
   REPLACE Received: from localhost (localhost [127.0.0.1]) (Authenticated sender:$1
 endif