On Apr 5, 2015, at 6:22 PM, Paul Hoffman <[email protected]> wrote:

> Greetings again. The discussion about exact-match and discovery in 
> draft-ietf-dane-openpgpkey has been useful for finding out what the use cases 
> are, and it's time to settle on a design that works for most people (we're 
> never going to make everyone happy).

How can we possibly do that without real experience in the field?

I know for a fact the case insensitive hashing rules will break Cyrus, where 
foo+Bar@mumble will deliver to mailbox 'inbox.Bar', which is distinct from 
foo+bar@mumble, delivering to 'inbox.bar'.  Folder names are case sensitive, so 
the two addresses are not equivalencies.

Ultimately, I don't see a way out of this other than to make a standard for 
sub-addressing, with a well defined cut-point delimiter.

But that still doesn't change how the LHS has been defined as case-sensitive 
since the dawn of time.  If we are to change this, RFC5322 3.4.1 needs a change 
in its last paragraph.  As things stand, we cannot treat <local-part> as 
case-insensitive in any interpretation of the grammar.

--lyndon

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