On Fri, Feb 3, 2017 at 11:23 AM, Viktor Dukhovni <ietf-dane@xxxxxxxxxxxx> wrote:
> On Feb 3, 2017, at 1:59 PM, Wei Chuang <weihaw@xxxxxxxxxx> wrote:
>
> The document calls for SmtpUtf8Name to use U-labels or NR-LDH ASCII labels
> for domain but not A-labels. We got advice to minimize alternative domain
> forms as some implementations have had bugs doing the transform. We chose
> U-labels to be consistent as the local-part is already UTF8 form and to
> simplify implementations. The document recommends that SmtpUtf8Name only
> be used when the local-part requires UTF8 and otherwise use rfc822Name.
Can you clarify what this means for addresses such as:
U: ietf-dane@духовный.org
Not recommended but supported by SmtpUtf8Name.
A: ietf-dane@xxxxxxxxxxxxxxxxxxxx
Use rfc822Name. This is recommended.
-Wei
The local part is all ASCII, so should the "U" or "A" variant be used?
--
Viktor.
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