Can Sieve Do This?

[Kevin Kruzich]

Greetings,

I'd like to create a sieve rule that copies all received messages to a 
folder named INBOX/BACKUP-<username>. This would be set to a limit such 
as size or number of messages in which the first in would be deleted.

Is it possible to do this with the current implementation of sieve? I'm 
using cyrus-imapd-utils-2.2.12-3.RHEL4.1


Cheers,
-kkruzich