>Any other issues should be brought forward
Section 3 says:
If the local-part contains any non-ASCII characters, it SHOULD be
normalized using the Unicode Normalization Form C from
[Unicode52].
but section 4 says:
Therefor, sending MUAs and MTAs supporting this
specification MUST NOT perform any kind of mapping rules based on the
email address.
Section 3 is wrong -- when RFC5321 says that local parts are opaque,
it means it. RFCs 6530 through 6532 deliberately did not provide any
advice on canonicalizing UTF-8 local parts, and it's inappropriate to
do it here.
R's,
John
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