[Dovecot] Sieve fileinto and year/month folders.

Hi there,

I am trying to move from lmtpd (lmtpd.sf.net) to dovecot sieve.

One thing used by some of powerusers are archiving mail automatically with autocreated folders based on year + month.

Is there any good way to make that with sieve...

One example

require "fileinto";

if address :is ["From", "To"] "dovecot@dovecot.org" { fileinto "INBOX.mls.%Y.%m.dovecot"; }

This will fill any mails into INBOX.mls.2012.03.dovecot uppon receiving...

I don't know if some sieve guru can tell me how to do that... ?

Kind regards,

Xavier