Re: Can we back up a bit and ask some basic questions? Analternate model

 > > Scenario 1b:
 > (1a with webmail)
 > > IMAA and UTF8ADDRESSES both require a major upgrade to
 > > the ISP's infrastructure.
 > 
 > IMAA-ACE-* yes, IMAA-UTF8 probably not. It might suffice to add or 
 > change to
 > <meta http-equiv="content-type" content="text/html; charset=utf-8">
 > in the delivered html page.

I'm not sure how IMAA-UTF8 differs from John Klensin's UTF8ADDRESSES
proposal, but this would appear to apply equally to both.  I'm not
sure I believe that it really would be that simple to upgrade web mail
systems to support UTF-8 addresses, but it's an interesting
suggestion.

 > > Scenario 2b: IMAA requires upgrades to the mail clients and, as
 > > currently specified in the draft, an upgrade to the organization's
 > > MTA (though the need to upgrade the MTA might disappear depending on
 > > the design decisions we take in IMAA).  UTF8ADDRESSES requires
 > > upgrades to the clients, the MTA and the ISP's infrastructure.
 > <snip>
 > 
 > IMAA-ACE-opaque requires that.
 > IMAA-ACE-split requires no modification on the server side, just like 
 > 2a.

That's what I intended by saying that the requirement to upgrade the
MTA might disappear depending on the design decisions we make in IMAA
(splitting is an open issue within IMAA).

	-roy