Dear all Where should I put the Authentication-Results header? Exim here is a "border" SMTP MTA for an internal mailbox store and MUAs
I am evaluating DMARC and making use of the handy (scraped from https:/ /github.com/Exim/exim/blob/master/doc/doc-txt/experimental-spec.txt): add_header = $dmarc_ar_header However, according to https://tools.ietf.org/html/rfc7001 the header is a "trace header" which leads to: https://tools.ietf.org/html/rfc5322#section-3.6.7 I have now gone RFC blind and would be gratefull for some direction on where the Authentication-Results header should be placed. We have several modifiers at our command for placing headers: http://www.exim.org/exim-html-current/doc/html/spec_html/ch -access_control_lists.html "This is done by specifying “:at_start:”, “:after_received:”, or “:at_start_rfc:” (or, for completeness, “:at_end:”)" For example, at the moment I see something like the dump below. Should the A-R header be where is is at the moment or just above the "Received: from hummus.csx.cam.ac.uk" line as my reading of the RFCs implies? If it should be elsewhere then the experimental-spec example could be usefully updated accordingly. Cheers Jon ---------------------- 8< ------------------------ Received: from smtp1.blueloop.net << internal >> Received: from hummus.csx.cam.ac.uk ([131.111.8.88]) by smtp1.blueloop.net with esmtps (TLSv1.2:DHE-RSA-AES256-GCM-SHA384:256) (Exim 4.85) (envelope-from < [email protected]>) id 1Z9ZZg-0005xj -92 for [email protected]; Mon, 29 Jun 2015 14:58:25 +0100 Received: from localhost ([127.0.0.1]:58837 helo=hummus.csx.cam.ac.uk) by hummus.csx.cam.ac.uk with esmtp (Exim 4.85) (envelope-from < [email protected]>) id 1Z9ZZW -0005Ti-3c for [email protected]; Mon, 29 Jun 2015 14:58:06 +0100 Received: from [80.237.252.132] (port=56171 helo=mx1.freesources.org) by hummus.csx.cam.ac.uk with esmtps (TLSv1:RC4-SHA:128) (Exim 4.85) (envelope-from <[email protected]>) id 1Z9ZXk-0004bK-4L for [email protected]; Mon, 29 Jun 2015 14:56:16 +0100 Received: stuff Date: Mon, 29 Jun 2015 15:56:12 +0200 (29/06/15 14:56:12) From: stuff To: [email protected] Message-id: <stuff> X-sender: stuff User-agent: stuff X-beenthere: [email protected] X-mailman-version: 2.1.16 Precedence: list List-id: A user list for the exim MTA <exim-users.exim.org> ... Errors-to: [email protected] Sender: Exim-users <[email protected]> Authentication-results: smtp1.blueloop.net; dmarc=none header.from=freesources.org ---------------------- 8< ------------------------ Blueloop Ltd Jon Gerdes | Senior Consultant Blueloop House Ilchester Road Yeovil Somerset BA21 3AA Tel: 2100 Web: www.blueloop.net Registered Address : Blueloop House, Ilchester Road, YEOVIL, BA21 3AA Registered England & Wales - 3981322 CONFIDENTIAL INFORMATION This e-mail and any files attached with it are confidential and for the sole use of the intended recipient(s). If you are not the intended recipient(s) you are prohibited from using, copying or distributing this or any information contained in it and should immediately notify the sender and delete the message from your system. Internet communications are not secure and Blueloop Limited is not responsible for unauthorised use by third parties nor for alteration or corruption in transmission. Furthermore, while Blueloop Limited have taken reasonable precautions to minimise the risk of software viruses, it cannot accept liability for any damage which you may suffer as a result of such viruses, and we therefore recommend you carry out your own virus checks on receipt of any e-mail. -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
