Dave Crocker wrote:
This poses a fundamental
barrier for users needing mail addresses to be expressed in a richer set of
I have yet to see this "need" established. Everyone who has supported
internationalised mail addresses has axiomatically assumed such a need,
and has conspicuously failed to provide any more detail, such as any of
Keith Moore's suggestions.
I think the first task in this area should be to investigate the nature
and degree of desire for non-ASCII local parts. This desire needs to
be weighed against the benefits we derive from writing all local parts
in a small, fixed alphabet (ASCII printables).