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Re: [Extra] [EXT] Re: Robert Wilton's Discuss on draft-ietf-extra-imap-fetch-preview-09: (with DISCUSS and COMMENT)

Michael Slusarz <michael.slusarz@open-xchange.com> Thu, 24 September 2020 06:30 UTC

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Date: Thu, 24 Sep 2020 00:30:14 -0600
From: Michael Slusarz <michael.slusarz@open-xchange.com>
To: Arnt Gulbrandsen <arnt@gulbrandsen.priv.no>, "Rob Wilton (rwilton)" <rwilton=40cisco.com@dmarc.ietf.org>
Cc: Barry Leiba <barryleiba@computer.org>, extra@ietf.org, Bron Gondwana <brong@fastmailteam.com>, The IESG <iesg@ietf.org>, extra-chairs@ietf.org, draft-ietf-extra-imap-fetch-preview@ietf.org
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Subject: Re: [Extra] [EXT] Re: Robert Wilton's Discuss on draft-ietf-extra-imap-fetch-preview-09: (with DISCUSS and COMMENT)
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The case study we are analysing is expected to be rare.

Real world: a server handling large amounts of incoming mail is going to deal with preview generation at delivery, rather than display. Any delays at delivery are not normally apparent to the end user. For a server supporting this extension, preview data will exist in almost every access, so generation issues will be irrelevant purposes of UX.

If a client is worried about the tiny fraction of requests where a preview can not be generated by the server, that client can have code to fallback to attempting to generating the preview itself (I.e. the current behavior for many clients). The situation of a single email where a preview cannot be generated is going to be interpreted by the end user as an exception... And the lack of preview has no bearing on whether an end user can view the full contents of the message.

michael
On 09/23/2020 2:47 PM Arnt Gulbrandsen <arnt@gulbrandsen.priv.no> wrote:


On Wednesday 23 September 2020 22:18:47 CEST, Rob Wilton (rwilton) wrote:
It states what to do for the case that the server both (i)
cannot generate the preview AND (ii) this is not a transient
error.
IMAP doesn't report transient errors (which is perhaps wrong, but that's
how it is). The server has no way to report transient errors for the other
dozen or more FETCH items. Why makes this one different?

IMO, the document shouldn't mention transient errors at all, since they're
alien to IMAP and orthogonal to this extension.

Arnt

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