Splitting maildir

[Richard Riley]

I recently reconfigured my email to use local maildir (making mairix
search possible). I also use nnmbox for system emails. My config looks
something like this:-

,----
| (setq gnus-secondary-select-methods '((nnmbox "private")))
| (setq nnmail-spool-file "/var/spool/mail/shamrock")
| (setq mail-sources
|       '((file :path "/var/spool/mail/shamrock")))
| 
|   (add-to-list 'gnus-secondary-select-methods
|                '(nnmaildir "riley" (directory "~/.Maildir/.riley")))
`----

(I dont know why I need to set mail.sources as well as nnmail-spool-file)

I created a nnmbox group

,----
| nnmbox+private:motorola
`----

I then set my nnmail-split-methods

,----
|  (setq nnmail-split-methods (quote (("nnmbox+private:motorola" 
"Subject:.*Milestone.*"))))
`----

Yet no splitting of new maildir mail occurs.

Opinions/corrections? I guess I am missing some sort of "allow
splitting" toggle?