expiry levels

[David Breton]

Hi

I like to expire my incoming mail to a folder that contains a
formatted time.  I use the following

;; Archiving received mail
(setq nnmail-expiry-target 'nnmail-fancy-expiry-target
      nnmail-fancy-expiry-targets
      '(
        ("from" ".*" "nnfolder+archive:archived-mail-%Y-%m")))


the problem is that after a few months, I've got more of those
archived-mail-YYYY-MM folders than I care about.  So I would like to
have a second level of expiry.  Say all mail sent to archive-YYYY-MM
gets sent to archive-YYYY after 3 months.  The idea is to have a
separate folder for the last three months an after that everything
that survived gets sent to the 'year' archive.  Can someone give me
some pointers.

Thanks

-- 
David Breton

Quick brown fox, jump over the lazy dogs.