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Re: [Emailcore] Delivered-To issues

John R Levine <johnl@taugh.com> Fri, 01 January 2021 22:23 UTC

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Date: Fri, 01 Jan 2021 17:23:41 -0500
Message-ID: <4860de0-38f4-3d86-6c55-398f906242e@taugh.com>
From: John R Levine <johnl@taugh.com>
To: emailcore@ietf.org
Cc: Dave Crocker <dcrocker@bbiw.net>
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Subject: Re: [Emailcore] Delivered-To issues
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On Fri, 1 Jan 2021, John Levine wrote:
> In article <def122c9-1eec-8828-6c17-1adb8d4c5ed9@dcrocker.net> you write:
>>      Should the recipient's MUA have access to the /sequence/ of RCPT TO
>>      addresses used to get to them?
>
> If we're documenting existing practice, which I think would be a good idea, yes.

Also remember that it's used to detect mail loops, and if you have a loop 
like A->B->C->A you need the history to see that you're looping.

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly

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