[Dovecot] Data loss from removing dovecot.index* files?

[Timo Sirainen]

On Wed, 2008-09-10 at 10:19 +0800, Patrick Nagel wrote:
> >> I've been rewriting the courier-dovecot-migrate script to handle  
> >> dovecot->courier conversions in addition to courier->dovecot.  One  
> >> issue I've found is that when the courier->dovecot conversion is  
> >> performed a second time (using --overwrite) and the dovecot-uidlist  
> >> file is written again, Dovecot starts generating errors when accessing  
> >> the maildir.  The simple fix is to remove all of the dovecot.index*  
> >> files so they are rebuilt when the maildir is scanned again.  Is it  
> >> safe to do this or is information stored in the index files that can't  
> >> be rebuilt by Dovecot the next time it scans the maildir?
> > 
> > It's safe, but if any IMAP clients had seen the mailbox the first time
> > they may become confused if the message UIDs change (which is also the
> > reason Dovecot starts complaining).
> > 
> 
> Aren't flags only stored in dovecot.index files when there are more than 26 of
> them (and thus can't be stored in the filename)?

Well, yes, but I'm assuming no-one has more than 26 :) Some day I'll
probably make Dovecot force that limit to maildir users.

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