[Dovecot] Auto rebuild indexes?

[Willie Gillespie]

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