Re: Review - draft-ietf-imapapnd-appendlimit-extension-05

Hi Alexey/SM,

I have updated the draft with final text as below. I will publish the next version (06) shortly.

1. Introduction

Several IMAP server have limitation for mail upload size which is not
published to the email client.  When email client APPEND a mail with
huge attachments, it fails due to size restriction set by the IMAP
server.  This results in unnecessary resource usage.  Especially in the 
mobile device environment, appending mail with huge attachment consumes
device resources like device battery power and mobile data.

The IMAP APPENDLIMIT extension provides an ability to advertise maximum
upload size allowed by the IMAP server, so that email client knows the
size limitation beforehand. By implementing this extension, IMAP server
side processing of huge attachments above the maximum upload size can
be avoided.


Regards,
Jay
-----Original Message-----
From: Alexey Melnikov [mailto:[email protected]] 
Sent: Monday, November 16, 2015 12:48 PM
To: S Moonesamy; Jayantheesh S B; Naren
Cc: [email protected]
Subject: Re: [imapext] Review - draft-ietf-imapapnd-appendlimit-extension-05

Hi SM,

On 16/11/2015 17:39, S Moonesamy wrote:
> Hi Naren, Jay,
>
> Alexey, thanks for reviewing the proposed text.
>
> At 08:55 16-11-2015, Jayantheesh S B wrote:
>> Kindly share your comments as well.
>>
>> This extension provides server admins with the capability to 
>> configure the maximum append limit size they will be expecting from 
>> the client. IMAP server side processing of huge attachments above the 
>> available limit can be avoided to a great extent, if this extension 
>> is supported by the IMAP client.
>
> I read the text [1] proposed by Jay.  You mentioned that there may be 
> a server-side limit for upload size which is not published to the 
> email client.  The last paragraph quoted above says that server 
> administrator can configure the maximum append limit that he/she is 
> expecting from the IMAP client.  This is already possible.  What you 
> might be trying to say is that the IMAP server can advertise the 
> maximum append size which it will allow for the IMAP client.  Both 
> sides, i.e. the IMAP server and the IMAP client, will have to support 
> this extension for the feature to work.
>
> The paragraph which Naren suggested is about convincing the server 
> side to implement this extension.  It is argued that by supporting 
> this extension, IMAP server side processing of huge attachments can be 
> avoided.
>
> How about the following:
>
>
>   1. Introduction
>
>   Several IMAP server have limitation for mail upload size which is not
>   published to the email client.  When email client APPEND a mail with
>   huge attachments, it fails due to size restriction set by the IMAP
>   server.  This results in unnecessary resource usage.  Especially in the
>   mobile device environment, appending mail with huge attachment consumes
>   device resources like device battery power and mobile data.
>
>   The IMAP APPENDLIMIT extension provides an ability to advertise the 
> maximum
>   upload size allowed by the IMAP server so that an IMAP client 
> supporting
>   this extension knows the size limitation beforehand.  By 
> implementing this
>   extension, IMAP server side processing of huge attachments above the 
> maximum
>   upload size can be avoided.

Yes, I think this read better.

>
> Regards,
> S. Moonesamy
>
> 1. http://www.ietf.org/mail-archive/web/imapext/current/msg05622.html

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