[Dovecot] Sieve on full mailbox

Hi,

We are using dovecot with "mail_plugins = cmusieve". I have Avelsieve in SquirrelMail for users to interact with it.

Is there any way I can allow users to run their sieve script on an entire mailbox? While the normal case of having messages filtered as they are delivered to the Maildir makes sense it would be useful for a few users to be able to apply their rules to every message on a one-off basis.

If there is a binary which will do this job? I could adapt the SquirrelMail interface to invoke it with appropriate arguments.

Thanks,

Ian