[Dovecot] Clients and dovecot-uidlist

[Timo Sirainen]

On Fri, 2009-07-31 at 19:27 +0200, Thomas Hummel wrote:
> On Fri, Jul 31, 2009 at 01:22:37PM -0400, Timo Sirainen wrote:
> 
> > Because client thinks UID = message. If a message's UID changes, the
> > client has no idea that it's still the same message.
> 
> Yes but what does and UID has changes from the client pint of view then ? 

If you have two messages with UIDs 3 and 5, then client makes on
difference between:

1) UID 3 and 5 are expunged, two new mails are delivered with UIDs 6 and
7.

2) Server loses dovecot-uidlist and assigns the existing messages UIDs 6
and 7.

The message contents may be different in those cases, but client doesn't
care about that. In both cases it just sees that it used to have UIDs 3
and 5 in its cache, but now server only has UIDs 6 and 7, so it goes and
deletes UIDs 3 and 5 from its cache and downloads the messages with UIDs
6 and 7.

> You mean something like, in its cache, the client has a mapping like 
> 
> slot 1 <-> UID u
> slot 2 <-> UID v
> ...
> 
> and he sees
> 
> slot 1 <-> UID z ?

Maybe. Depends on what you mean by slot.
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