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Re: [dmarc-ietf] Email security beyond DMARC?

Ken Simpson <ksimpson+ietfdmarc@mailchannels.com> Thu, 21 March 2019 17:13 UTC

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References: <20190319184209.804E42010381DB@ary.qy> <alpine.DEB.2.20.1903201442260.7108@softronics.hoeneisen.ch> <alpine.OSX.2.21.1903201042010.79863@ary.qy> <CAJ4XoYcyaEBHYGPDY4ah_O+Obk-tijnL9SnxvzKyywu4BEmkrw@mail.gmail.com> <alpine.OSX.2.21.1903211031070.83149@ary.qy> <CAEYhs4GJeRhCQUxWxCDm8K46v_rTjER3ueoMRhMdUdZzK1ZSaQ@mail.gmail.com> <alpine.OSX.2.21.1903211308550.83693@ary.qy>
In-Reply-To: <alpine.OSX.2.21.1903211308550.83693@ary.qy>
From: Ken Simpson <ksimpson+ietfdmarc@mailchannels.com>
Date: Thu, 21 Mar 2019 10:12:52 -0700
Message-ID: <CAEYhs4EUNjtwvxwDauJx5pM8XsKxnAJipVsC9zZkmXm35_drfQ@mail.gmail.com>
To: John R Levine <johnl@taugh.com>
Cc: IETF DMARC WG <dmarc@ietf.org>
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Subject: Re: [dmarc-ietf] Email security beyond DMARC?
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On Thu, Mar 21, 2019 at 10:09 AM John R Levine <johnl@taugh.com> wrote:

> > IMHO, by cutting out direct domain spoofing, DMARC makes it easier for
> > receivers to craft algorithms that spot impersonation attacks.
>
> I realize that's the theory, but do we know how well that works in
> practice?
>

That would be crossing into the realm of tradecraft.

Regards,
Ken

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