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Re: [Extra] In favour of OBJECTID being inculded in IMAP4REV2 - please reply by Friday!

"Bron Gondwana" <brong@fastmailteam.com> Wed, 20 November 2019 07:49 UTC

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Date: Wed, 20 Nov 2019 18:49:34 +1100
From: Bron Gondwana <brong@fastmailteam.com>
To: extra@ietf.org
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Subject: Re: [Extra] In favour of OBJECTID being inculded in IMAP4REV2 - please reply by Friday!
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On Mon, Nov 18, 2019, at 20:50, Bron Gondwana wrote:
> Also - if your server doesn't store a value and doesn't have anywhere to cache it, it can fall back to this algorithm:
> 
>  - MAILBOXID: digest(mboxname,uidvalidity)
 - EMAILID: digest(mboxname,uidvalidity,uid)
 - THREADID: NIL

I was reminded off list that the final text in RFC8474 made it MUST be the same value, so it's not as easy as all that to have the objectid change on MOVE or RENAME and be totally compliant.

Some options:
1) insist on remaining exactly compliant.
2) include RFC8474 naming and behaviour in IMAP4REV2 but weaken the MUSTs around keeping IDs the same.
3) OK, leave OBJECTID as optional and don't include it in IMAP4REV2.

Opinions?

Bron.

--
 Bron Gondwana, CEO, Fastmail Pty Ltd
 brong@fastmailteam.com

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