Re: [ietf-smtp] Variable HELO name, was DSNs

John C Klensin <john-ietf@jck.com> Sun, 26 April 2020 15:07 UTC

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Date: Sun, 26 Apr 2020 11:07:18 -0400
From: John C Klensin <john-ietf@jck.com>
To: Ned Freed <ned.freed@mrochek.com>, Alessandro Vesely <vesely@tana.it>
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Subject: Re: [ietf-smtp] Variable HELO name, was DSNs
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--On Sunday, April 26, 2020 07:20 -0700 Ned Freed
<ned.freed@mrochek.com> wrote:

>...
> There are lots of ways to offer NOTIFY=SUCCESS selectively
> depending on what you're trying to accomplish. Keeping in mind
> that it's a RCPT TO parameter, another possibiity is to only
> allow it on domains within the ADMD.
> 
> Given all the possible uses and ways of authorizing them, it
> is perhaps better to focus on the one problematic case: Relay
> between ADMDs where the server doesn't trust the client.
>...

Exactly.  I was just focusing on what I took to be an argument
that the functionality didn't work because (presumably everyone)
had operational policies against using it.

  john