Re: [dmarc-ietf] ARC questions
Michael Thomas <mike@mtcc.com> Sun, 22 November 2020 19:31 UTC
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From: Michael Thomas <mike@mtcc.com>
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Date: Sun, 22 Nov 2020 11:31:23 -0800
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Subject: Re: [dmarc-ietf] ARC questions
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On 11/22/20 11:18 AM, Douglas E. Foster wrote: > ARC has a very limited set of items included in the signature. Body > hash is purposefully excluded. So it is the same signature algorithm > but with different parameters and a different purpose. Therefore it > has a different header label . Now wait, Kurt just said that the body hash is included. Somebody has to be wrong here. Mike > > > Sent from my Verizon, Samsung Galaxy smartphone > > > > -------- Original message -------- > From: John R Levine <johnl@taugh.com> > Date: 11/22/20 2:14 PM (GMT-05:00) > To: Michael Thomas <mike@mtcc.com>, "Kurt Andersen (b)" > <kboth@drkurt.com> > Cc: dmarc@ietf.org > Subject: Re: [dmarc-ietf] ARC questions > > > Is there a reason that there is a separate ARC-signature rather than > just > > using the DKIM signature that is normally created for the new > message? Since > > ARC is new, you'd not want the intermediary to stop DKIM signing the > message > > so you end up with essentially two signatures doing essentially the > same > > thing? > > The ARC signature has a sequence number so you can track the chain of > custody. You are right that it is similar to the DKIM signature but the > extra ovehead doesn't seem excessive. > > Regards, > John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY > Please consider the environment before reading this e-mail. https://jl.ly > > _______________________________________________ > dmarc mailing list > dmarc@ietf.org > https://www.ietf.org/mailman/listinfo/dmarc > > > _______________________________________________ > dmarc mailing list > dmarc@ietf.org > https://www.ietf.org/mailman/listinfo/dmarc
- [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John Levine
- Re: [dmarc-ietf] ARC questions John Levine
- Re: [dmarc-ietf] ARC questions Kurt Andersen (b)
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Douglas E. Foster
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Douglas E. Foster
- Re: [dmarc-ietf] ARC questions Joseph Brennan
- Re: [dmarc-ietf] ARC questions Todd Herr
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions Doug Foster
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions Todd Herr
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John Levine
- Re: [dmarc-ietf] ARC questions John Levine
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Dave Crocker
- Re: [dmarc-ietf] ARC questions John Levine
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Seth Blank
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Douglas Foster
- Re: [dmarc-ietf] ARC questions Murray S. Kucherawy
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Murray S. Kucherawy
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Murray S. Kucherawy
- Re: [dmarc-ietf] ARC questions Alessandro Vesely
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John Levine
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions John R Levine
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Michael Thomas
- Re: [dmarc-ietf] ARC questions Benny Pedersen
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Brandon Long
- Re: [dmarc-ietf] ARC questions Michael Thomas