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Re: [ietf-smtp] Fwd: New Version Notification for draft-crocker-email-deliveredto-00.txt

John Levine <johnl@taugh.com> Fri, 05 February 2021 21:31 UTC

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From: John Levine <johnl@taugh.com>
To: ietf-smtp@ietf.org
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Subject: Re: [ietf-smtp] Fwd: New Version Notification for draft-crocker-email-deliveredto-00.txt
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In article <468945c6-04f9-12c7-c49c-51badaf04ea2@tana.it> you write:
>When I write a message to user@foà.it (fake user, real domain) the MDA writes
>Delivered-To: user@xn--fo-kia.it.  I see no reason for doing so.

Mine does the same thing. I want to treat A-label and U-label versions
of domain names the same throughout the MTA, so it turns them all into
A-labels on the way in, and only back into U-labels when sending
UTF8SMTP mail. Works fine.

I don't think this is something the draft should address. It's an
implementation detail down in the weeds.

R's,
John

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