Spamassassin delete/mark header

[Berkel]

I created a mailgroup with several members. For this group, i configured Spamassassin, that it will delete spam, instead of marking it as a ***SPAM*** message. I also configured that the mailgroup isn't using the serverside settings.

The situation now is, that when a spammessage reaches the mailgroup. The mail isn't deleted, but forwarded to the members with the subject marked as ***SPAM***.

Can somebody tell me where this setting is done or how to fix it?

Thanks in advance.