[Dovecot] 1.0.1: corrupt index on fresh mailbox, ideas?

[Timo Sirainen]

On Mon, 2007-07-09 at 11:45 -0700, Troy Engel wrote:
> A new employee started today, when logging into his new mailbox this 
> morning during a walk-through I got a nasty server error response in 
> Thunderbird - something I never see, DC runs smooth as butter for us. 
> Checking the server log I see this:
> 
> == snip ==
> dovecot: Jul 09 09:38:54 Error: IMAP(xxxxxxx): Maildir 
> /home/x/xxxxxxx/Maildir sync: UIDVALIDITY changed (1183406107 -> 1183999134)

dovecot-uidlist file had UIDVALIDITY 1183406107 (Mon Jul  2 19:55:07 UTC
2007) and index file had UIDVALIDITY 1183999134 (Mon Jul  9 16:38:54 UTC
2007). This also explains the rest of the errors, Dovecot v1.0 doesn't
handle very nicely these UIDVALIDITY changes (v1.1 does better).

For this to happen:

1. The index files have to be created.

2. dovecot-uidlist file has to be recreated without seeing the existing
index.

3. Accessing mailbox again with the new dovecot-uidlist and old indexes
causes this error.

So the real reasons for these could include temporarily using different
index file paths, restoring indexes/uidlists from backups, temporarily
using index files for accessing other mailbox.

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