Re: [EAI] double angle brackets

[Shawn Steele <Shawn.Steele at microsoft.com>]

>	* non-EAI, support for multiple "From:": will accept
>	both and probably discard the i18n email address.

That's an interesting assumption.  Presumably I could also reject the entire message since I have no clue how to parse the address.
	
>	* non-EAI, no support for multiple "From:": Will reject
>	either both addresses or the second one.  If one is
>	accepted, probably the first one (which should probably
>	be the ASCII address) will probably be used.  If both
>	are rejected, then nothing much is lost compared to the
>	failed downgrade case -- especially if you remember that
>	an EAI envelope is unlikely to reach a non-EAI system.

Ditto.
	
>	* EAI compliant system: will support multiple "From:"
>	because the spec will require it.  

I still can't tell that they're a pair.  It could be intentionally from 2 different people, one of which has an EAI address, but the other has an ASCII address, and we don't know (or didn't bother to mention) what the EAI address user's downgrade address is.

So an EAI compliant system that "assumed" that "From: Unicode, ASCII" was EAI would not bother replying to the ASCII address, &/or it would 

Besides, if this was reasonable for From, what about To: or CC: or Reply-To:?  Presumably I could mail it to other EAI users as well, so how does a recipient respond?  How would one reliably match up the pairs?

Also, presumably I know my own downgrade address, but am I going to know all of the downgrade addresses for everyone on To: (or hopefully Bcc:) that I'm forwarding a joke to?

I remain unconvinced that this solves enough downgrade problems completely enough to be interesting.

-Shawn