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Taxonomy of proposals so far
Given the lull in the discussion, it might be a good time to look at
what is in front of us. A few orthogonal and related proposals have
come forth. Some of what appears here has been suggested in off-list
Here is a first cut at a taxonomy of proposals for internationalizing
the mailbox names and their transport. Note that the names appear in
the From, To, Cc, and Received headers (and maybe others).
1. ASCII-encode the names.
2. UTF8-encode the names, protecting the result with an ESTMTP
2.1 If the SMTP server doesn't know the extension, bounce
2.2 If the SMTP server doesn't know the extension, send the
message anyway, but fall back to non-UTF8 names.
2.2.1 Fall back ASCII-encoding the names.
2.2.2 Fall back using a different mailbox name that is
22.214.171.124 Get the second name from headers that are
sent with withe message.
126.96.36.199 Get the second name by querying a server that
is supposed to know about that user.
3. Do nothing.
Before we go into the merits and problems of each of these, or how
they might interact, it would be good to see if this is a
reasonably-complete chart. Changes and additions are welcome.
--Paul Hoffman, Director
--Internet Mail Consortium