Re: [exim-dev] [Bug 1309] Headers included in dkim_sign_head…

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Autor: Jeremy Harris
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Dla: exim-dev
Temat: Re: [exim-dev] [Bug 1309] Headers included in dkim_sign_headers are not in the signature when not in the message
On 23/09/16 16:35, Robert Blayzor wrote:
> Most importantly " if they are present in the message being signed”… but now it adds them to signing regardless? That certainly breaks some things (quite a bit), most notably when you post a message into a mailing list and “List-Id” is added. That completely invalidates the original DKIM signature.


... and doesn't say you can't add other things as well, including
headers not present.

Yes, DKIM breaks mailinglists...

> Is there a knob to turn this back to the original functionality and “not oversign” ?


Not a simple knob, no.
You could construct a non-oversigning list for dkim_sign_headers by
using a suitably complex expansion. Probably involving ${filter...}.
--
Cheers,
Jeremy