Here it is a chunk of headers from mailtester:
Received: by mail-tester.com (Postfix, from userid 500)
id 2F0859FCFC; Mon, 27 Jan 2020 14:55:27 +0100 (CET)
Authentication-Results: mail-tester.com;
dkim=pass (2048-bit key; unprotected) header.d=fdde.trade header.i=@fdde.trade...