dovecot - Jan 2011 - Auto rebuild indexes?

Here's an easy question for you.  I'm restoring some emails from a 
backup.  Do I need to delete or otherwise manually rebuild the indexes?

dovecot.index.cache
dovecot.index.log
dovecot-uidlist

Or will Dovecot itself detect that something is amiss and handle it on 
first folder access?

Using Maildir with Dovecot 1.2.9

On 14.1.2011, at 1.02, Willie Gillespie wrote:
> Here's an easy question for you.  I'm restoring some emails from a
backup.  Do I need to delete or otherwise manually rebuild the indexes?
No.
> Or will Dovecot itself detect that something is amiss and handle it on
first folder access?
Yep.