sieve vs amavis for spam filter rules

[Sruli Saurymper]

Hi,

I created a rule in Amavis for all emails with a score 6.308> should be 
posted in the users Spam folder witht eh Spam Score in the subject, this 
works correctly the downside is I need to set post permissions for each 
users Spam folder, I was wondering if using Sieve would be a better 
option however I can't any docs / howtos on using Sieve in Kolab (i 
found in wiki but that’s from 2.4 or something I guess) using Sieve I 
set a global filter without needing manually to set for each user? if 
yes can someone point me to some docs on how to add a sieve filter in Kolab?


Thanks
Sruli
[Kolab 3.1]