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

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.

Regards,
S. Moonesamy

1. http://www.ietf.org/mail-archive/web/imapext/current/msg05622.html 

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