Re: John Cowan on IMAA draft

["Adam M. Costello" <ietf-imaa.amc+0@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

John Cowan <cowan@xxxxxxxxxxxxxxxx> wrote:

> Since local names are under the sole control of a single domain
> (even if people nominate their own local names, it's the domain mail
> administrator who decides whether they work), I think that having an
> ACE prefix is not necessary.

An ACE prefix (or suffix, or infix, etc) is necessary so that
applications know whether to convert ASCII local-parts to non-ASCII for
display.  How else will my mail program know how to display the From
address of incoming mail?

AMC