Martin Gregorie wrote:

> This appears to describe just the display-name. From RFC 5322 it seems
> that the address can only use ASCII characters, and at this point I'm
> only dealing with the address.

Please note

Obsoleted by: 5322                                     PROPOSED STANDARD
Updated by: 5335, 5336                                      Errata Exist

Network Working Group                                 P. Resnick, Editor
Request for Comments: 2822                         QUALCOMM Incorporated
Obsoletes: 822                                                April 2001
Category: Standards Track

https://tools.ietf.org/html/rfc5336
https://tools.ietf.org/html/rfc5335

4.1.  UTF-8 Syntax and Normalization

   UTF-8 characters can be defined in terms of octets using the
   following ABNF [RFC5234], taken from [RFC3629]:

   UTF8-xtra-char  =   UTF8-2 / UTF8-3 / UTF8-4

   UTF8-2          =   %xC2-DF UTF8-tail

   UTF8-3          =   %xE0 %xA0-BF UTF8-tail /
                       %xE1-EC 2(UTF8-tail) /
                       %xED %x80-9F UTF8-tail /
                       %xEE-EF 2(UTF8-tail)

   UTF8-4          =   %xF0 %x90-BF 2( UTF8-tail ) /
                       %xF1-F3 3( UTF8-tail ) /
                       %xF4 %x80-8F 2( UTF8-tail )

   UTF8-tail       =   %x80-BF

   These are normatively defined in [RFC3629], but kept in this document
   for reasons of convenience.

   See [RFC5198] for a discussion of normalization; the use of
   normalization form NFC is RECOMMENDED.


I was wrong about 1990 - you are at state of 2001 :)

Sorry for making fun of it, but it is indeed funny. I knew I had to refresh
my memories, cause didn't have to do with mailing since 4 years when I
changed company.

regards

--- SoupGate-Win32 v1.05