imap clients say i have 4K messages but spool has 12894 files

[Brian J. Murrell]

On Tue, 2020-05-26 at 09:33 -0400, Brian J. Murrell wrote:
> Hi.
> 
> Every IMAP client I query my cyrus imapd 2.4.17 server with says I
> have
> ~4K messages in my INBOX.  However when I do a listing of
> /var/spool/imap/b/user/brian/ it shows almost 13K files.
> 
> None of these include messages which have been deleted but not
> expunged.  I manually expunge my mailbox many times per day.
> 
> If I'm understanding mbexamine's output correctly, I have files on
> disk
> that are not being displayed by mbexmine.  My understanding of
> mbexamine's output is that on a line formatted as such:
> 
> 000001> UID:00089183   INT_DATE:[redacted] SENTDATE:[redacted]
> SIZE:1537  
> 
> that the 00089183 is the reference to the file on the spool in
> /var/spool/imap/b/user/brian/89183.
> 
> Is that correct?  If so, I definitely have files on the disk which
> are
> not found in any "000001> UID" line from mbexamine.  ~9600 of them. 
> That seems to make up the difference between what an IMAP client sees
> and how many files are on disk.
> 
> I also have multiple occurrences of the same "000001> UID:" and where
> there are no matching files on the disk.  Should that be possible?
> 
> So how come the huge discrepancies and how do I reconcile them?

No other thoughts on how I can reconcile this gross discrepancy?

Ultimately I have an IMAP spool that is growing without bound due to
messages continuing to live on the spool beyond their life in the index
and getting orphaned.

Cheers,
b.

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