[Dovecot] Default and per-User sieve script

Hi guys,

is there any way to configure Dovecot to process the default sieve script and, after that, a user specific script?

I have a default script to sort spam into a spam folder but if a user specific script is present, the default script is ignored.

sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_global_path = /usr/local/etc/dovecot/sieve/default.sieve

Regards Patrick