On Thu, 11 Dec 2014, Nico Williams wrote:
So maybe we need no canonicalization step at all.
If I say I'm [email protected], and you type [email protected] into your
MUA to send me e-mail, you might not reach me.
That seems fair.
Actually, that is really stupid, seeing that many mobile phones, which
are hard to type on to begin with, auto-capitalize for many reasons. My
phone regularly corrects emails I forward to myself to [email protected].
No currently maintained implementation of email should support that these
two might be different local users.
And allows for aliases of any kind. If I want to
publish SMIMEA RRs for all possible capitalizations of "foo"
@bar.example, well I can, and if I don't want to then I don't have to.
A client can lookup the given name, if NXDOMAIN and not all lowercase,
lowercase it and try again.
And someone should write an RFC updating SMTP to not allow
case-sensitivity for different mailboxes so we can stop coming back to
this whenever anyone wants to do anything with email addresses.
Paul
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