diff --git a/data/conf/postfix/anonymize_headers.pcre b/data/conf/postfix/anonymize_headers.pcre
index a096e3fd..a7ccd8af 100644
--- a/data/conf/postfix/anonymize_headers.pcre
+++ b/data/conf/postfix/anonymize_headers.pcre
@@ -1,6 +1,6 @@
-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])
+  REPLACE Received: from localhost (localhost [127.0.0.1]) (Authenticated sender:$1
 endif
 /^\s*X-Enigmail/        IGNORE
 /^\s*X-Mailer/          IGNORE
diff --git a/docker-compose.yml b/docker-compose.yml
index ca7e715f..fc3372e8 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -365,7 +365,7 @@ services:
         - /lib/modules:/lib/modules:ro
 
     watchdog-mailcow:
-      image: mailcow/watchdog:1.50
+      image: mailcow/watchdog:1.51
       # Debug
       #command: /watchdog.sh
       build: ./data/Dockerfiles/watchdog