Re: [EAI] draft-ietf-eai-popimap-downgrade-03.txt

[Frank Ellermann <[e-mail]>]

On 15 November 2011 03:11, Kazunori Fujiwara wrote:

> Please check the draft and diffs at:
>       http://tools.ietf.org/html/draft-ietf-eai-popimap-downgrade-03

Hi, I don't get the idea of mail "from" a group.  You can only send
mail "to" a group, including Reply-To:.  It is just a funny tag for
zero or more recipients.  And the cases "zero" or "more than one" are
not what you want for a Sender: or Resent-Sender:.

Using <address> for *Sender: instead of <address-list> for *From:
does not help with the "zero" or "more than one" cases, because
address = mailbox / group

You specify downgrade algorithms for MAILBOX and GROUP, and that's
enough for the new "groupified" *From: and Sender:.  But IMO you'd
get a similar effect if you add an algorithm for MAILBOXLIST, and
keep the syntax of *From: and *Sender: as it is in RFC 5322.

Presumably this is an old IETF 81 discussion, and I just missed why
the "groupification" hack is better than my frontal KISS approach.

-Frank (will post again if I see another nit)