[EAI] [Technical Errata Reported] RFC6857 (6573)

RFC Errata System <rfc-editor@rfc-editor.org> Wed, 05 May 2021 19:45 UTC

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Subject: [EAI] [Technical Errata Reported] RFC6857 (6573)
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The following errata report has been submitted for RFC6857,
"Post-Delivery Message Downgrading for Internationalized Email Messages".

You may review the report below and at:

Type: Technical
Reported by: Kaspar Etter <me@kasparetter.com>

Section: A

Original Text
   From: =?UTF-8?Q?DISPLAY-LOCAL?=
         =?UTF-8?Q?NON-ASCII-LOCAL=40example=2Ecom?= :;

Corrected Text
   From: =?UTF-8?Q?DISPLAY-LOCAL_?=
         =?UTF-8?Q?NON-ASCII-LOCAL=40example=2Ecom?= :;

Taking the original text from Errata 3955 (https://www.rfc-editor.org/errata/eid3955), the two encoded-words decode to: DISPLAY-LOCALNON-ASCII-LOCAL@example.com :; (According to section 6.2 of RFC 2047, linear whitespace between adjacent encoded-words is ignored.) This is clearly not desirable and thus a space should be encoded at the end of all display names in appendix A.

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RFC6857 (draft-ietf-eai-popimap-downgrade-08)
Title               : Post-Delivery Message Downgrading for Internationalized Email Messages
Publication Date    : March 2013
Author(s)           : K. Fujiwara
Category            : PROPOSED STANDARD
Source              : Email Address Internationalization
Area                : Applications
Stream              : IETF
Verifying Party     : IESG