>So I thought about punycode RFC3492. I know the RFC might only be for domains, >but I asked >myself, why this would not be applied to a local part as well.
Mailboxes can contain characters not valid in punycode. Mailboxes in regular ASCII mail can contain spaces and ASCII graphics. Mailboxes in EAI mail can include arbitrary UTF-8. You could imagine a punycode-like encoding for mailboxes, or perhaps something more like quoted printable, but punycode or A-labels aren't adequate. Also keep in mind that RFC 5321 says that mailbox names are opaque, so any case folding we do is technically wrong. But in practice everyone expects case folded mailboxes to work, so even mail purists are likely to grumble but admit that a hack like Viktor's optional lower case is OK. R's, John _______________________________________________ dane mailing list [email protected] https://www.ietf.org/mailman/listinfo/dane
