Re: what is the real problem?

>> 6. Users need to be able to transcribe addresses that they receive in
>> email, whether in message headers or in a message body, and whether or
>> not their software supports the extensions that enable IMAs, and
>> whether or not the recipient knows the language and script in which 
>> the
>> sender normally writes his name and email address.  This is separate
>> from the need to reply to messages or store received addresses in an
>> address book.
>>
>> (Note: #6 directly implies the need to support multiple versions of a
>> sender address, in order to provide a recipient with an address that 
>> he
>> can transcribe.)
>
> This requirement strikes me as unreasonably broad: it demands not 
> merely
> multiple versions, but as many multiple versions as there are scripts.

not quite - all that is required is that there be one address that is 
transcribable by any potential recipient.  but for me it's an open 
question as to whether a Latin alphabet / ASCII-encoded fallback is 
sufficient, given the absence of those characters on many of the 
world's keyboards.