Re: Cancel Message for Internt Mail

"John W. Noerenberg" <jwn2@qualcomm.com> Tue, 13 May 1997 21:03 UTC

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References: Your message of "Mon, 12 May 1997 01:35:07 +0200." <3.0.1.32.19970512013507.006a7028@pop.mindspring.com> <3.0.1.32.19970512013507.006a7028@pop.mindspring.com>
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Date: Tue, 13 May 1997 13:09:59 -0700
To: "Anthony E. Greene" <agreene@nemaine.com>
From: "John W. Noerenberg" <jwn2@qualcomm.com>
Subject: Re: Cancel Message for Internt Mail
Cc: Valdis.Kletnieks@vt.edu, ietf-smtp@imc.org
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At 11:44 AM -0400 5/12/1997, Valdis.Kletnieks@vt.edu wrote:
>***
>*** PGP Signature Status: good
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>
>On Mon, 12 May 1997 01:35:07 +0200, you said:
>> Does anyone know of a discussion on a retraction function for mail
>> analogous to an NNTP cancel message? I have looked through the IMC and IETF
>> sites without success. I saw the draft SMTP extension that allows
>> supersession and expiration, but that's not quite what I'm looking for. I'd
>> like to see a way for the sender to cancel a message before it is read by
>> the recipient.
>>
>> If there isn't such a proposal on the table is this the place to discuss it?
>
>Yes, this would be the place to discuss it.
>
>No, there's no such proposal as far as I am aware.
>
>There are a number of severe problems you need to deal with in any such
>proposal:

Tony, if you have some ideas that can address Valdis' concerns, I'd be very
interested in hearing more.  I have to be honest and say that I think it is
highly unlikely you can guarantee the cancel in the distrbuted environment
of the Internet.  And that is what will be required.

I even think you would be hard pressed to prove that the nntp CANCEL is
100% effective.  By that I mean that no one at any site had read a message
that was also cancelled.

john noerenberg
jwn2@qualcomm.com
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