Re: [exim] Inserting a TLS status header?

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Author: Viktor Dukhovni
Date:  
To: exim-users
Subject: Re: [exim] Inserting a TLS status header?
On Tue, Aug 05, 2014 at 03:14:15PM +0300, Dominik R?ttsches wrote:

> Am 04.08.2014 15:46, schrieb Jeremy Harris:
> >On 04/08/14 12:23, Dominik R?ttsches wrote:
> >>I would like to use the TLS status of incoming delivered mail to spam
> >>filtering. My idea was to insert a header into the mail which describes
> [...]
>        add_header = X-TLS-In-Cipher: $tls_in_cipher


Postfix, with "smtpd_tls_received_header = yes", decorates the Received
header with TLS protocol information:

    Received: from sbh17.songbird.com (sbh17.songbird.com [72.52.113.17])
        (using TLSv1.1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
    by amnesiac.example.com (Postfix) with ESMTPS id 0609B2AA9FF
    ...


Is something like this supported by Exim? Are you specifically
looking for a separate header? Or would decorating the top-most
Received header (prepended by the receiving MTA) in a similar manner
be enough?

-- 
    Viktor.