The mailing list for listmasters using Sympa

["Lukman" <address@concealed>]

Dear All,

Currently i'm trying to create moderated list with sympa.
It works when it is not mederated (see the log message):
Nov  8 18:46:06 img sympa[642]: Message for all-imd from
address@concealed accepted (1 seconds, 1 sessions), size=1471
Nov  8 18:47:36 img sympa[642]: Processing message for all-imd with
priority 5, <01fc01c2871c$a255ef10$5200a8c0@lukm4n>

but when i change it to moderated list, error occured in sympa log., the
message is "

Nov  8 18:47:36 img sympa[642]: Key bdf5f6ef957cf20734e51836b383d917 for
list all-imd from address@concealed sent to editor
Nov  8 18:48:11 img sympa[642]: Can't open
/var/sympa/spool/msg/sympa.1036756090.6447: Permission denied
Nov  8 18:48:11 img sympa[642]: Moving bad file sympa.1036756090.6447 to
bad/

actually the directory permission on /var/sympa/spool/msg is full
control for sympa and postfix daemon.

is there any one can help me with this problem ??
fyi, my sympa ver is sympa-3.2.1-2mdk.

Thanks and Regards,
Lukman