Charles has kindly pointed me to the migration section of the wiki, apologies for not looking there first.

On Thu, Aug 02, 2007 at 11:02:16AM +0100, Pete McEvoy wrote:

Hi. I've been migrating users from mbox to maildir on a new server running dovecot 1.0 - is there any method I can employ to prevent my pop3 users having to redownload mails after I move them?

Thanks

-- Pete