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Date:      Mon, 26 Nov 2018 16:59:16 +0000
From:      RW <rwmaillists@googlemail.com>
To:        freebsd-questions@freebsd.org
Subject:   Re: Invalid DKIM signatures in this list
Message-ID:  <20181126165916.6c6bf874@gumby.homeunix.com>
In-Reply-To: <alpine.BSF.2.21.9999.1811261704230.90197@mail.fig.ol.no>
References:  <20181126125259.GB86999@admin.sibptus.ru> <alpine.BSF.2.21.9999.1811261704230.90197@mail.fig.ol.no>

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On Mon, 26 Nov 2018 17:10:27 +0100 (CET)
Trond Endrest=C3=B8l wrote:

> On Mon, 26 Nov 2018 19:52+0700, Victor Sudakov wrote:
>=20
> > Dear Colleagues,
> >=20
> > I have noticed that the Mailman which manages this list keeps the
> > sender's "DKIM-Signature:" header intact but modifies the body of
> > the message by adding a footer. =20
>=20
> Are you sure?
>=20
> When I received your message, the hash was made up using Message-ID,=20
> Subject, To, From, Date, and In-Reply-To. I failed to find the latter=20
> field.

That's legitimate, it signs the absence of that header if it's not
present at the time of signing.=20



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