[Tickets #12447] Re: equally adjusted folders have different behaviour when new mail arrives

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Ticket URL: http://bugs.horde.org/ticket/12447
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  Ticket             | 12447
  Updated By         | Michael Slusarz <slusarz at horde.org>
  Summary            | equally adjusted folders have different behaviour when
                     | new mail arrives
  Queue              | IMP
  Version            | Git master
  Type               | Bug
  State              | Feedback
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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Michael Slusarz <slusarz at horde.org> (2013-07-11 10:40) wrote:

Not to mention that ANY other process that touches an IMAP mailbox  
will remove the recent flag.  E.g. ingo filtering using the imap  
backend.

There is no way of reliably detecting "new" mail on a disconnected  
client (even MODSEQ doesn't help us here).  Unless we start doing  
something like keeping track of all UIDs in the mailbox - or at least  
a hash - which would become *very* expensive on large mailboxes.