[Dovecot] How to stop POP clients from downloading mail after directory corruption

Transferring my email from a Courier server, as well as some corruption in my dovecot installation caused all POP mails to be downloaded again.

I surmised that the dovecot-uidlist file was not present in the first instance, and was probably out of sync in the second.

Is there a way to do some reindexing and uid-list regeneration that can stop the problem from occurring?

• Frank