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DMARC -> CERT?

Subject: DMARC -> CERT?
From: mike at mtcc.com (Michael Thomas)
Date: Thu, 17 Apr 2014 07:02:03 -0700
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <CAEmG1=rn58-Trt=3C-fGFmgDtMb5uy5OtWyvN11Nsj5PFPpmbg@mail.gmail.com> <CAGfsgR01S+yJoYifYAyD-CGTJBh1jsRh_TK9bL3izAVTcLJkjw@mail.gmail.com> <CACnPsNUQpGYMZoX+u0JENuXbuM13RV8CwYLaX08jgP04HVCEZQ@mail.gmail.com> <CAL9jLaZJjPpZ7vzw2uE4QFQwrkcBu7cS1eD3Uu1NHUDHxxkthQ@mail.gmail.com> <CALgnk9rKa+DuLKaGR=2OOM6u2QeEJ2Qvzs1PrNCJBHctPAykoA@mail.gmail.com> <[email protected]> <CAGfsgR15sHwr8s_68vE+5u3hBk0dcNwnfiaM_jW_ZZEG38Bc_g@mail.gmail.com> <CACnPsNXT4O=0XXRdWkRxW-64Z16G8nF5iBUWJ7UbKtsJVJiyiQ@mail.gmail.com> <CAGfsgR1VM-Be4dkos=ad8BK5ZMhvLQjPU=BcpPT6N+iZ3WBBNg@mail.gmail.com> <CACnPsNWiSRtQbhgtjMdAmDdH7cUtjt8mDLa3DHKQ+b=zQu_mUQ@mail.gmail.com> <CAGfsgR1JGG0x_8yJeRpqpzeFYQ=km-5Xfu4Nkk5AZyBjNpvjxQ@mail.gmail.com> <[email protected]>

On 04/16/2014 09:19 PM, Private Sender wrote:
>
> I'm sorry but is there a fundamental misunderstanding of dmarc going on
> in this thread? Yahoo doesn't want you to be able to send "@yahoo.com"
> email from anything other than THEIR servers which contain the private
> key that corresponds to their DKIM implementation, and conversely dmarc.
> "p=reject" tells the receiving domain to reject the message if it isn't
> signed by the private key that corresponds with the public key that is
> in the dkim txt record for "yahoo.com"
>
> Isn't this the whole point of dmarc? Stop spammers from sending email
> with "@yahoo.com" that doesn't originate from a valid yahoo email server.

There fundamental misunderstanding is the assumption that DKIM signatures
are never broken for valid uses of mail. They are. Would things be so 
simple.

Mike

References:
- DMARC -> CERT?
  - From: mfidelman at meetinghouse.net (Miles Fidelman)
- DMARC -> CERT?
  - From: mfidelman at meetinghouse.net (Miles Fidelman)
- DMARC -> CERT?
  - From: laszlo at heliacal.net (Laszlo Hanyecz)
- DMARC -> CERT?
  - From: mfidelman at meetinghouse.net (Miles Fidelman)
- DMARC -> CERT?
  - From: laszlo at heliacal.net (Laszlo Hanyecz)
- DMARC -> CERT?
  - From: mpetach at netflight.com (Matthew Petach)
- DMARC -> CERT?
  - From: jimpop at gmail.com (Jim Popovitch)
- DMARC -> CERT?
  - From: scott at doc.net.au (Scott Howard)
- DMARC -> CERT?
  - From: morrowc.lists at gmail.com (Christopher Morrow)
- DMARC -> CERT?
  - From: matthias at leisi.net (Matthias Leisi)
- DMARC -> CERT?
  - From: mfidelman at meetinghouse.net (Miles Fidelman)
- DMARC -> CERT?
  - From: jimpop at gmail.com (Jim Popovitch)
- DMARC -> CERT?
  - From: scott at doc.net.au (Scott Howard)
- DMARC -> CERT?
  - From: jimpop at gmail.com (Jim Popovitch)
- DMARC -> CERT?
  - From: scott at doc.net.au (Scott Howard)
- DMARC -> CERT?
  - From: jimpop at gmail.com (Jim Popovitch)
- DMARC -> CERT?
  - From: nobody at snovc.com (Private Sender)

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