user rename and uidvalidity value

[Vladimir Klejch]

Hi


partly diskussed in:

https://bugzilla.mozilla.org/show_bug.cgi?id=365651#c4

snip ---

ftp://ftp.rfc-editor.org/in-notes/rfc3501.txt
6.3.5.  RENAME Command
       The value of the highest-used unique identifier of the old mailbox
       name MUST be preserved so that a new mailbox created with the same
       name will not reuse the identifiers of the former incarnation,
       UNLESS the new incarnation has a different unique identifier
       validity value.  See the description of the UID command for more
       detail.


If IMAP server returns same "unique identifier validity value" after 
rename,  IMAP server MUST preserve "highest-used unique identifier".

snip ---




the problem is, where to store the old "highest-used unique identifier" 
for the same mailboxname, if reused  ??

the logical solution is to generate new uidvalidity for renamed mailbox, 
that guarantees, that in case of existing previous mailbox with the same 
name, that the change to other content is recognized ..



 		Cheers
 					Kleo


On Wed, 5 Nov 2014, Hamada, Ondrej wrote:

> Hi,
> Can you please explain to me, why is a new value of uidvalidity generated when a user is renamed in cyrus_imapd?
>
> Rename:
> A001 rename user/a at bbb.c<mailto:user/a at bbb.c>om user/x at bbb.com
>
> Before rename:
> A001 select inbox
> * OK [CLOSED] Ok
> * 3 EXISTS
> * 0 RECENT
> * FLAGS (\Answered \Flagged \Draft \Deleted \Seen)
> * OK [PERMANENTFLAGS (\Answered \Flagged \Draft \Deleted \Seen \*)] Ok
> * OK [UNSEEN 2] Ok
> * OK [UIDVALIDITY 1415092196] Ok
> * OK [UIDNEXT 4] Ok
> * OK [HIGHESTMODSEQ 5] Ok
> * OK [URLMECH INTERNAL] Ok
> A001 OK [READ-WRITE] Completed
>
> After rename:
> A001 select inbox
> * 3 EXISTS
> * 0 RECENT
> * FLAGS (\Answered \Flagged \Draft \Deleted \Seen)
> * OK [PERMANENTFLAGS (\Answered \Flagged \Draft \Deleted \Seen \*)] Ok
> * OK [UNSEEN 2] Ok
> * OK [UIDVALIDITY 1415093437] Ok
> * OK [UIDNEXT 4] Ok
> * OK [HIGHESTMODSEQ 7] Ok
> * OK [URLMECH INTERNAL] Ok
> A001 OK [READ-WRITE] Completed
>
> Thank you in advance,
>
> Ondra
>
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   	~~	~~	~~	~~	~~	~~	~~
Vladimir `KLEO' Klejch     	Kleo'at'netbox.cz
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