On 2023-10-22 Jeremy Harris via Exim-users <exim-users@???> wrote:
[...]
> If (and there's the question) you think that a DKIM signature should
> detect when a message has been modified, do you not think that
> adding headers is a modification?
Hello,
I think it depends on which the header would be added. Some additions
should be allowed. Exim's default setting for dkim_sign_headers is
extremely conservative and imho does not make sense. I had tried to
discuss this in
https://bugs.exim.org/show_bug.cgi?id=2394.
I personally am using +From:+Sender:+Reply-To:+Subject:+Date:+Message-ID:+To:+Cc:+MIME-Version:+Content-Type:+Content-Transfer-Encoding:+Content-ID:+Content-Description:=Resent-Date:=Resent-From:=Resent-Sender:=Resent-To:=Resent-Cc:=Resent-Message-ID:+In-Reply-To:+References:=List-Id:=List-Help:=List-Post
I am sure this set is not perfect and I have missed something, though.
cu Andreas
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