Reindl Harald: > i am not sure if my validation is up-to-date in > rejecting "frankkr?t...@example.com" > > AFAIK ??? are only allowed in DOMAIN name (IDN)
RFC5321/22 do not allow non-ASCII in the localpart or domain, or
in any message header. All encodings of non-ASCII in domains and
header values must be done before mail is given to Postfix. In the
case of the localpart or header labels, there is no encoding that
satisfies RFC5321/22.
Wieste
