(1) This version still has some editor's notes. Are these intended
for publication?
(2) In section 1.3:
An "i18mail user" has one or more non-ASCII email addresses. Such a
user may have ASCII addresses too; if the user has more than one
email account and corresponding address, or more than one alias for
the same address, he or she has some method to choose which address
to use on outgoing email. Note that under this definition, it is not
possible to tell from the address that an email sender or recipient
is an i18mail user. There is no such thing as an "i18mail message";
the term applies only to users and their agents and capabilities.
Does the second-to-last sentence refer to an ASCII address, or any
address? The wording implies any address, but if an address is
non-ASCII, surely that is a good sign that the owner of that address
is an i18mail user?
(3) In section 4.3:
the risk should be
minimized by the fact that the selection of submission servers are
presumably under the control of the sender's client and the selection
of potential intermediate relays is under the control of the
administration of the final delivery server.
[snip]
For situations in which a client encounters a server that does not
support UTF8SMTP, there are basically two possibilities:
o Reject the message or generate and send a non-delivery message,
[snip]
o Figure out a way to downgrade the envelope or message body in
I apologize if this has already been discussed, but in light of the
first quoted sentence, the two possible actions can be augmented by
another approach: try an alternate MX host and/or requeue the message
and try later. That is, because the mail path is normally under
administrative control of the end points or their organizations, it
may be reasonable to conclude that UTF8SMTP is normally supported
along this path, and if a system is encountered which doesn't support
it, this may be a temporary failure. Obviously, if this is tried but
persistently fails, one of the other two methods must be used.
(This could also be mentioned in the smtpext document.)
--
Randall Gellens
Opinions are personal; facts are suspect; I speak for myself only
-------------- Randomly-selected tag: ---------------
Truth resides in every human heart, and one has to search for it
there, and to be guided by truth as one sees it. But no one has
a right to coerce others to act according to his own view of the
truth. --Gandhi
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