On Wednesday, June 4, 2014 6:58:43 PM CEST, Viktor Dukhovni wrote:
My impression is that UTF-8 domain names are are an MUA display
format issue.
There was tremedously tedious discussion of the approach you suggest, and
of many others. There was even a set of experimental RFCs issued. In the
end the experimental RFCs were discarded. here's how RFC 6532 sums up the
final message format changes:
The preceding changes mean that the following constructs now allow
UTF-8:
1. Unstructured text, used in header fields like "Subject:" or
"Content-description:".
2. Any construct that uses atoms, including but not limited to the
local parts of addresses and Message-IDs. This includes
addresses in the "for" clauses of "Received:" header fields.
3. Quoted strings.
4. Domains.
6531 references 6532, and the MAIL FROM/RCPT TO syntax allows UTF8. 6855
makes corresponding changes to IMAP (no more mUTF7, hurray), 6856 to POP,
etc.
Arnt