Bürgermeister Karsten Knobbe: Unauthorized Post Attempt from wordpress@karsten-knobbe.de

An unauthorized message has been sent to Bürgermeister Karsten Knobbe. Sender: wordpress@karsten-knobbe.de Subject: [Bürgermeister Karsten Knobbe] Deine Website wurde auf WordPress 5.2.3 aktualisiert
If you wish to allow posts from this address, please add wordpress@karsten-knobbe.de to the registered users list and manually add the content of the email found below.
Otherwise, the email has already been deleted from the server and you can ignore this message.
If you would like to prevent postie from forwarding mail in the future, please change the FORWARD_REJECTED_MAIL setting in the Postie settings panel
The original content of the email has been attached.