Kmail and filters

[Collins]

Does anyone know how to get  Kmail filters to work properly?  I've got several 
groups identically defined as filters, but only the linux-users filter works.  
It matters not whether I defined thm as <List-id> or <To>, but only the lu 
mail gets filtered to my chosen folder.  Other that the obvious: forget about 
the others, you only need lu <grin>, what am I missing?
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Collins - kmail 3.1 test