Re: [EAI] double angle brackets

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

How do you tell multiple from meaning EAI apart from non-EAI multiple from?

-----Original Message-----
From: Ernie Dainow [mailto:edainow at ca.afilias.info] 
Sent: Tuesday, September 08,  2009 14:30
To: John C Klensin
Cc: Shawn Steele; ima at ietf.org
Subject: Re: [EAI] double angle brackets



John C Klensin wrote:
> --On Tuesday, September 08, 2009 16:51 +0000 Shawn Steele
> <Shawn.Steele at microsoft.com> wrote:
>
>   
>>> To replace double angle brackets for the Sender, John Klensin
>>> proposed  using multiple From fields. SM amended this with
>>> Reply-To to specify the  preferred address, as in
>>>         From: EAI-addr, ASCII-addr
>>>         Reply-To: EAI-addr
>>> where the EAI-addr gets dropped in Downgrade.
>>>       
>> I'd imagine that "something" isn't going to be happy with 2
>> addresses.
>>     
>
> Right.  In particular, there are a lot of systems that do not
> support multiple-address From:, multiple-address Reply-to:, or
> both.
>
>   
I don't think it's important if a lot of existing systems do not support 
multiple from addresses.  As non-EAI systems they would only receive 
downgraded messages, which have only a single From address and no Reply-To.

EAI systems, which will receive multiple From addresses, would have to 
support it since it would be part of the EAI spec.

    -Ernie Dainow