[MlMt] Organisation of smart mailboxes?

[Jan Erik Moström]

I've started to use a number of smart mailboxes and I want to keep most 
of them in a "group" (they belong together but doesn't necessarily have 
a relation to each other).

The natural way would be to put these into a "folder" or something 
similar. And this is also what I do for handling for example mailing 
lists:

smart mailbox for all list mails
     smart mailbox for subject A
     smart mailbox for subject B
     etc

And I can of course create a dummy smart mailbox to contain other smart 
mailboxes:

dummy smart mailbox with no rules
     smart mailbox for task R
     smart mailbox for perston T
     etc

For some reason it bothers me (can't explain why :D) to have a smart 
mailbox without any function other than to contain other smart 
mailboxes. So my question is simply: is there some kind of "folder 
functionality" for organising smart mailboxes?


= jem