personal spam folder

[Krzysztof Matusik]

Hello all

I'd like to setup kolab (amavis, postfix or cyrus or anything suitable) to 
transfer emails marked as spam by filters to personal folders in each users 
account independently.
How can I do it? Is there a simple way (I couldn't find such googling) ?
Do I need to setup sieve or something? How can I make "spam" folder for each 
account easy/automatically?
How can I set up a rule to clean all spam emails in such folders if older than 
period of time?

Has anyone such mechanism implemented and willing to share please.

regards

Krzysztof